Bug Summary

File:kern/sysv_sem.c
Warning:line 676, column 11
Copies out a struct with uncleared padding (>= 6 bytes)

Annotated Source Code

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clang -cc1 -triple x86_64-unknown-freebsd11.2 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name sysv_sem.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model static -mthread-model posix -mdisable-fp-elim -relaxed-aliasing -masm-verbose -mconstructor-aliases -ffreestanding -mcode-model kernel -target-cpu x86-64 -target-feature -mmx -target-feature -sse -target-feature -aes -target-feature -avx -disable-red-zone -no-implicit-float -dwarf-column-info -debugger-tuning=gdb -nostdsysteminc -nobuiltininc -resource-dir /root/kernel-uninitialized-memory-checker/build/lib/clang/8.0.0 -include /usr/obj/root/freebsd/amd64.amd64/sys/GENERIC/opt_global.h -D _KERNEL -D KLD_MODULE -D KLD_TIED -D HAVE_KERNEL_OPTION_HEADERS -I . -I /root/freebsd/sys -I /root/freebsd/sys/contrib/ck/include -I /usr/obj/root/freebsd/amd64.amd64/sys/GENERIC -D __printf__=__freebsd_kprintf__ -O2 -Wno-pointer-sign -Wno-unknown-pragmas -Wno-error-tautological-compare -Wno-error-empty-body -Wno-error-parentheses-equality -Wno-error-unused-function -Wno-error-pointer-sign -Wno-error-shift-negative-value -Wno-address-of-packed-member -std=iso9899:1999 -fdebug-compilation-dir /usr/obj/root/freebsd/amd64.amd64/sys/GENERIC/modules/root/freebsd/sys/modules/sysvipc/sysvsem -ferror-limit 19 -fmessage-length 0 -fwrapv -stack-protector 1 -fobjc-runtime=gnustep -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-checker alpha.security.KernelMemoryDisclosure -analyzer-disable-checker core,unix,deadcode,nullability -analyzer-output=html -o /root/analyzer/2018-12-28-044519-76292-1 -x c /root/freebsd/sys/kern/sysv_sem.c -faddrsig
1/*-
2 * Implementation of SVID semaphores
3 *
4 * Author: Daniel Boulet
5 *
6 * This software is provided ``AS IS'' without any warranties of any kind.
7 */
8/*-
9 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
10 *
11 * Copyright (c) 2003-2005 McAfee, Inc.
12 * Copyright (c) 2016-2017 Robert N. M. Watson
13 * All rights reserved.
14 *
15 * This software was developed for the FreeBSD Project in part by McAfee
16 * Research, the Security Research Division of McAfee, Inc under DARPA/SPAWAR
17 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS research
18 * program.
19 *
20 * Portions of this software were developed by BAE Systems, the University of
21 * Cambridge Computer Laboratory, and Memorial University under DARPA/AFRL
22 * contract FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent
23 * Computing (TC) research program.
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 * SUCH DAMAGE.
45 */
46
47#include <sys/cdefs.h>
48__FBSDID("$FreeBSD$")__asm__(".ident\t\"" "$FreeBSD$" "\"");
49
50#include "opt_sysvipc.h"
51
52#include <sys/param.h>
53#include <sys/systm.h>
54#include <sys/sysproto.h>
55#include <sys/eventhandler.h>
56#include <sys/kernel.h>
57#include <sys/proc.h>
58#include <sys/lock.h>
59#include <sys/module.h>
60#include <sys/mutex.h>
61#include <sys/racct.h>
62#include <sys/sem.h>
63#include <sys/sx.h>
64#include <sys/syscall.h>
65#include <sys/syscallsubr.h>
66#include <sys/sysent.h>
67#include <sys/sysctl.h>
68#include <sys/uio.h>
69#include <sys/malloc.h>
70#include <sys/jail.h>
71
72#include <security/audit/audit.h>
73#include <security/mac/mac_framework.h>
74
75FEATURE(sysv_sem, "System V semaphores support")static struct sysctl_oid sysctl___kern_features_sysv_sem = { .
oid_parent = ((&(&sysctl___kern_features)->oid_children
)), .oid_children = { ((void *)0) }, .oid_number = ((-1)), .oid_kind
= (2 | 0x00040000 | (0x80000000 | 0x00008000)), .oid_arg1 = (
((int *)((void *)0))), .oid_arg2 = (1), .oid_name = ("sysv_sem"
), .oid_handler = (sysctl_handle_int), .oid_fmt = ("I"), .oid_descr
= "System V semaphores support", .oid_label = ("feature"), }
; __asm__(".globl " "__start_set_sysctl_set"); __asm__(".globl "
"__stop_set_sysctl_set"); static void const * const __set_sysctl_set_sym_sysctl___kern_features_sysv_sem
__attribute__((__section__("set_" "sysctl_set"))) __attribute__
((__used__)) = &(sysctl___kern_features_sysv_sem); _Static_assert
((((0x80000000 | 0x00008000) & 0xf) == 0 || ((0x80000000 |
0x00008000) & 0xf) == 2) && sizeof(int) == sizeof
(*(((int *)((void *)0)))), "compile-time assertion failed");
76
77static MALLOC_DEFINE(M_SEM, "sem", "SVID compatible semaphores")struct malloc_type M_SEM[1] = { { ((void *)0), 877983977, "sem"
, ((void *)0) } }; static struct sysinit M_SEM_init_sys_init =
{ SI_SUB_KMEM, SI_ORDER_THIRD, (sysinit_cfunc_t)(sysinit_nfunc_t
)malloc_init, ((void *)(M_SEM)) }; __asm__(".globl " "__start_set_sysinit_set"
); __asm__(".globl " "__stop_set_sysinit_set"); static void const
* __set_sysinit_set_sym_M_SEM_init_sys_init __attribute__((__section__
("set_" "sysinit_set"))) __attribute__((__used__)) = &(M_SEM_init_sys_init
); static struct sysinit M_SEM_uninit_sys_uninit = { SI_SUB_KMEM
, SI_ORDER_ANY, (sysinit_cfunc_t)(sysinit_nfunc_t)malloc_uninit
, ((void *)(M_SEM)) }; __asm__(".globl " "__start_set_sysuninit_set"
); __asm__(".globl " "__stop_set_sysuninit_set"); static void
const * __set_sysuninit_set_sym_M_SEM_uninit_sys_uninit __attribute__
((__section__("set_" "sysuninit_set"))) __attribute__((__used__
)) = &(M_SEM_uninit_sys_uninit);
78
79#ifdef SEM_DEBUG
80#define DPRINTF(a) printf a
81#else
82#define DPRINTF(a)
83#endif
84
85static int seminit(void);
86static int sysvsem_modload(struct module *, int, void *);
87static int semunload(void);
88static void semexit_myhook(void *arg, struct proc *p);
89static int sysctl_sema(SYSCTL_HANDLER_ARGSstruct sysctl_oid *oidp, void *arg1, intmax_t arg2, struct sysctl_req
*req);
90static int semvalid(int semid, struct prison *rpr,
91 struct semid_kernel *semakptr);
92static void sem_remove(int semidx, struct ucred *cred);
93static struct prison *sem_find_prison(struct ucred *);
94static int sem_prison_cansee(struct prison *, struct semid_kernel *);
95static int sem_prison_check(void *, void *);
96static int sem_prison_set(void *, void *);
97static int sem_prison_get(void *, void *);
98static int sem_prison_remove(void *, void *);
99static void sem_prison_cleanup(struct prison *);
100
101#ifndef _SYS_SYSPROTO_H_
102struct __semctl_args;
103int __semctl(struct thread *td, struct __semctl_args *uap);
104struct semget_args;
105int semget(struct thread *td, struct semget_args *uap);
106struct semop_args;
107int semop(struct thread *td, struct semop_args *uap);
108#endif
109
110static struct sem_undo *semu_alloc(struct thread *td);
111static int semundo_adjust(struct thread *td, struct sem_undo **supptr,
112 int semid, int semseq, int semnum, int adjval);
113static void semundo_clear(int semid, int semnum);
114
115static struct mtx sem_mtx; /* semaphore global lock */
116static struct mtx sem_undo_mtx;
117static int semtot = 0;
118static struct semid_kernel *sema; /* semaphore id pool */
119static struct mtx *sema_mtx; /* semaphore id pool mutexes*/
120static struct sem *sem; /* semaphore pool */
121LIST_HEAD(, sem_undo)struct { struct sem_undo *lh_first; } semu_list; /* list of active undo structures */
122LIST_HEAD(, sem_undo)struct { struct sem_undo *lh_first; } semu_free_list; /* list of free undo structures */
123static int *semu; /* undo structure pool */
124static eventhandler_tag semexit_tag;
125static unsigned sem_prison_slot; /* prison OSD slot */
126
127#define SEMUNDO_MTXsem_undo_mtx sem_undo_mtx
128#define SEMUNDO_LOCK()__mtx_lock_flags(&((((&sem_undo_mtx))))->mtx_lock,
((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (128)); mtx_lock(&SEMUNDO_MTX)__mtx_lock_flags(&((((&sem_undo_mtx))))->mtx_lock,
((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (128));
129#define SEMUNDO_UNLOCK()__mtx_unlock_flags(&((((&sem_undo_mtx))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (129)); mtx_unlock(&SEMUNDO_MTX)__mtx_unlock_flags(&((((&sem_undo_mtx))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (129));
130#define SEMUNDO_LOCKASSERT(how)__mtx_assert(&(((&sem_undo_mtx)))->mtx_lock, (((how
))), ("/root/freebsd/sys/kern/sysv_sem.c"), (130)); mtx_assert(&SEMUNDO_MTX, (how))__mtx_assert(&(((&sem_undo_mtx)))->mtx_lock, (((how
))), ("/root/freebsd/sys/kern/sysv_sem.c"), (130));
131
132struct sem {
133 u_short semval; /* semaphore value */
134 pid_t sempid; /* pid of last operation */
135 u_short semncnt; /* # awaiting semval > cval */
136 u_short semzcnt; /* # awaiting semval = 0 */
137};
138
139/*
140 * Undo structure (one per process)
141 */
142struct sem_undo {
143 LIST_ENTRY(sem_undo)struct { struct sem_undo *le_next; struct sem_undo **le_prev;
} un_next; /* ptr to next active undo structure */
144 struct proc *un_proc; /* owner of this structure */
145 short un_cnt; /* # of active entries */
146 struct undo {
147 short un_adjval; /* adjust on exit values */
148 short un_num; /* semaphore # */
149 int un_id; /* semid */
150 unsigned short un_seq;
151 } un_ent[1]; /* undo entries */
152};
153
154/*
155 * Configuration parameters
156 */
157#ifndef SEMMNI50
158#define SEMMNI50 50 /* # of semaphore identifiers */
159#endif
160#ifndef SEMMNS340
161#define SEMMNS340 340 /* # of semaphores in system */
162#endif
163#ifndef SEMUME50
164#define SEMUME50 50 /* max # of undo entries per process */
165#endif
166#ifndef SEMMNU150
167#define SEMMNU150 150 /* # of undo structures in system */
168#endif
169
170/* shouldn't need tuning */
171#ifndef SEMMSL340
172#define SEMMSL340 SEMMNS340 /* max # of semaphores per id */
173#endif
174#ifndef SEMOPM100
175#define SEMOPM100 100 /* max # of operations per semop call */
176#endif
177
178#define SEMVMX32767 32767 /* semaphore maximum value */
179#define SEMAEM16384 16384 /* adjust on exit max value */
180
181/*
182 * Due to the way semaphore memory is allocated, we have to ensure that
183 * SEMUSZ is properly aligned.
184 */
185
186#define SEM_ALIGN(bytes)(((bytes)+((sizeof(long))-1))&(~((sizeof(long))-1))) roundup2(bytes, sizeof(long))(((bytes)+((sizeof(long))-1))&(~((sizeof(long))-1)))
187
188/* actual size of an undo structure */
189#define SEMUSZ(((__builtin_offsetof(struct sem_undo, un_ent[50]))+((sizeof(
long))-1))&(~((sizeof(long))-1))) SEM_ALIGN(offsetof(struct sem_undo, un_ent[SEMUME]))(((__builtin_offsetof(struct sem_undo, un_ent[50]))+((sizeof(
long))-1))&(~((sizeof(long))-1)))
190
191/*
192 * Macro to find a particular sem_undo vector
193 */
194#define SEMU(ix)((struct sem_undo *)(((intptr_t)semu)+ix * seminfo.semusz)) \
195 ((struct sem_undo *)(((intptr_t)semu)+ix * seminfo.semusz))
196
197/*
198 * semaphore info struct
199 */
200struct seminfo seminfo = {
201 SEMMNI50, /* # of semaphore identifiers */
202 SEMMNS340, /* # of semaphores in system */
203 SEMMNU150, /* # of undo structures in system */
204 SEMMSL340, /* max # of semaphores per id */
205 SEMOPM100, /* max # of operations per semop call */
206 SEMUME50, /* max # of undo entries per process */
207 SEMUSZ(((__builtin_offsetof(struct sem_undo, un_ent[50]))+((sizeof(
long))-1))&(~((sizeof(long))-1))), /* size in bytes of undo structure */
208 SEMVMX32767, /* semaphore maximum value */
209 SEMAEM16384 /* adjust on exit max value */
210};
211
212SYSCTL_INT(_kern_ipc, OID_AUTO, semmni, CTLFLAG_RDTUN, &seminfo.semmni, 0,static struct sysctl_oid sysctl___kern_ipc_semmni = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semmni
), .oid_arg2 = (0), .oid_name = ("semmni"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Number of semaphore identifiers"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semmni __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semmni); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semmni
)), "compile-time assertion failed")
213 "Number of semaphore identifiers")static struct sysctl_oid sysctl___kern_ipc_semmni = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semmni
), .oid_arg2 = (0), .oid_name = ("semmni"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Number of semaphore identifiers"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semmni __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semmni); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semmni
)), "compile-time assertion failed");
214SYSCTL_INT(_kern_ipc, OID_AUTO, semmns, CTLFLAG_RDTUN, &seminfo.semmns, 0,static struct sysctl_oid sysctl___kern_ipc_semmns = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semmns
), .oid_arg2 = (0), .oid_name = ("semmns"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Maximum number of semaphores in the system"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semmns __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semmns); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semmns
)), "compile-time assertion failed")
215 "Maximum number of semaphores in the system")static struct sysctl_oid sysctl___kern_ipc_semmns = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semmns
), .oid_arg2 = (0), .oid_name = ("semmns"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Maximum number of semaphores in the system"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semmns __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semmns); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semmns
)), "compile-time assertion failed");
216SYSCTL_INT(_kern_ipc, OID_AUTO, semmnu, CTLFLAG_RDTUN, &seminfo.semmnu, 0,static struct sysctl_oid sysctl___kern_ipc_semmnu = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semmnu
), .oid_arg2 = (0), .oid_name = ("semmnu"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Maximum number of undo structures in the system"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semmnu __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semmnu); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semmnu
)), "compile-time assertion failed")
217 "Maximum number of undo structures in the system")static struct sysctl_oid sysctl___kern_ipc_semmnu = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semmnu
), .oid_arg2 = (0), .oid_name = ("semmnu"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Maximum number of undo structures in the system"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semmnu __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semmnu); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semmnu
)), "compile-time assertion failed");
218SYSCTL_INT(_kern_ipc, OID_AUTO, semmsl, CTLFLAG_RWTUN, &seminfo.semmsl, 0,static struct sysctl_oid sysctl___kern_ipc_semmsl = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| (((0x80000000|0x40000000)|0x00080000))), .oid_arg1 = (&
seminfo.semmsl), .oid_arg2 = (0), .oid_name = ("semmsl"), .oid_handler
= (sysctl_handle_int), .oid_fmt = ("I"), .oid_descr = "Max semaphores per id"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semmsl __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semmsl); _Static_assert((((((0x80000000
|0x40000000)|0x00080000)) & 0xf) == 0 || ((((0x80000000|0x40000000
)|0x00080000)) & 0xf) == 2) && sizeof(int) == sizeof
(*(&seminfo.semmsl)), "compile-time assertion failed")
219 "Max semaphores per id")static struct sysctl_oid sysctl___kern_ipc_semmsl = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| (((0x80000000|0x40000000)|0x00080000))), .oid_arg1 = (&
seminfo.semmsl), .oid_arg2 = (0), .oid_name = ("semmsl"), .oid_handler
= (sysctl_handle_int), .oid_fmt = ("I"), .oid_descr = "Max semaphores per id"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semmsl __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semmsl); _Static_assert((((((0x80000000
|0x40000000)|0x00080000)) & 0xf) == 0 || ((((0x80000000|0x40000000
)|0x00080000)) & 0xf) == 2) && sizeof(int) == sizeof
(*(&seminfo.semmsl)), "compile-time assertion failed");
220SYSCTL_INT(_kern_ipc, OID_AUTO, semopm, CTLFLAG_RDTUN, &seminfo.semopm, 0,static struct sysctl_oid sysctl___kern_ipc_semopm = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semopm
), .oid_arg2 = (0), .oid_name = ("semopm"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Max operations per semop call"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semopm __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semopm); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semopm
)), "compile-time assertion failed")
221 "Max operations per semop call")static struct sysctl_oid sysctl___kern_ipc_semopm = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semopm
), .oid_arg2 = (0), .oid_name = ("semopm"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Max operations per semop call"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semopm __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semopm); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semopm
)), "compile-time assertion failed");
222SYSCTL_INT(_kern_ipc, OID_AUTO, semume, CTLFLAG_RDTUN, &seminfo.semume, 0,static struct sysctl_oid sysctl___kern_ipc_semume = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semume
), .oid_arg2 = (0), .oid_name = ("semume"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Max undo entries per process"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semume __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semume); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semume
)), "compile-time assertion failed")
223 "Max undo entries per process")static struct sysctl_oid sysctl___kern_ipc_semume = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semume
), .oid_arg2 = (0), .oid_name = ("semume"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Max undo entries per process"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semume __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semume); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semume
)), "compile-time assertion failed");
224SYSCTL_INT(_kern_ipc, OID_AUTO, semusz, CTLFLAG_RDTUN, &seminfo.semusz, 0,static struct sysctl_oid sysctl___kern_ipc_semusz = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semusz
), .oid_arg2 = (0), .oid_name = ("semusz"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Size in bytes of undo structure"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semusz __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semusz); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semusz
)), "compile-time assertion failed")
225 "Size in bytes of undo structure")static struct sysctl_oid sysctl___kern_ipc_semusz = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| ((0x80000000|0x00080000))), .oid_arg1 = (&seminfo.semusz
), .oid_arg2 = (0), .oid_name = ("semusz"), .oid_handler = (sysctl_handle_int
), .oid_fmt = ("I"), .oid_descr = "Size in bytes of undo structure"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semusz __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semusz); _Static_assert(((((0x80000000
|0x00080000)) & 0xf) == 0 || (((0x80000000|0x00080000)) &
0xf) == 2) && sizeof(int) == sizeof(*(&seminfo.semusz
)), "compile-time assertion failed");
226SYSCTL_INT(_kern_ipc, OID_AUTO, semvmx, CTLFLAG_RWTUN, &seminfo.semvmx, 0,static struct sysctl_oid sysctl___kern_ipc_semvmx = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| (((0x80000000|0x40000000)|0x00080000))), .oid_arg1 = (&
seminfo.semvmx), .oid_arg2 = (0), .oid_name = ("semvmx"), .oid_handler
= (sysctl_handle_int), .oid_fmt = ("I"), .oid_descr = "Semaphore maximum value"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semvmx __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semvmx); _Static_assert((((((0x80000000
|0x40000000)|0x00080000)) & 0xf) == 0 || ((((0x80000000|0x40000000
)|0x00080000)) & 0xf) == 2) && sizeof(int) == sizeof
(*(&seminfo.semvmx)), "compile-time assertion failed")
227 "Semaphore maximum value")static struct sysctl_oid sysctl___kern_ipc_semvmx = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| (((0x80000000|0x40000000)|0x00080000))), .oid_arg1 = (&
seminfo.semvmx), .oid_arg2 = (0), .oid_name = ("semvmx"), .oid_handler
= (sysctl_handle_int), .oid_fmt = ("I"), .oid_descr = "Semaphore maximum value"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semvmx __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semvmx); _Static_assert((((((0x80000000
|0x40000000)|0x00080000)) & 0xf) == 0 || ((((0x80000000|0x40000000
)|0x00080000)) & 0xf) == 2) && sizeof(int) == sizeof
(*(&seminfo.semvmx)), "compile-time assertion failed");
228SYSCTL_INT(_kern_ipc, OID_AUTO, semaem, CTLFLAG_RWTUN, &seminfo.semaem, 0,static struct sysctl_oid sysctl___kern_ipc_semaem = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| (((0x80000000|0x40000000)|0x00080000))), .oid_arg1 = (&
seminfo.semaem), .oid_arg2 = (0), .oid_name = ("semaem"), .oid_handler
= (sysctl_handle_int), .oid_fmt = ("I"), .oid_descr = "Adjust on exit max value"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semaem __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semaem); _Static_assert((((((0x80000000
|0x40000000)|0x00080000)) & 0xf) == 0 || ((((0x80000000|0x40000000
)|0x00080000)) & 0xf) == 2) && sizeof(int) == sizeof
(*(&seminfo.semaem)), "compile-time assertion failed")
229 "Adjust on exit max value")static struct sysctl_oid sysctl___kern_ipc_semaem = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = (2 | 0x00040000
| (((0x80000000|0x40000000)|0x00080000))), .oid_arg1 = (&
seminfo.semaem), .oid_arg2 = (0), .oid_name = ("semaem"), .oid_handler
= (sysctl_handle_int), .oid_fmt = ("I"), .oid_descr = "Adjust on exit max value"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_semaem __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_semaem); _Static_assert((((((0x80000000
|0x40000000)|0x00080000)) & 0xf) == 0 || ((((0x80000000|0x40000000
)|0x00080000)) & 0xf) == 2) && sizeof(int) == sizeof
(*(&seminfo.semaem)), "compile-time assertion failed");
230SYSCTL_PROC(_kern_ipc, OID_AUTO, sema,static struct sysctl_oid sysctl___kern_ipc_sema = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = ((5 | 0x80000000
| 0x00040000)), .oid_arg1 = (((void *)0)), .oid_arg2 = (0), .
oid_name = ("sema"), .oid_handler = (sysctl_sema), .oid_fmt =
(""), .oid_descr = "Array of struct semid_kernel for each potential semaphore"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_sema __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_sema); _Static_assert(((5 | 0x80000000
| 0x00040000) & 0xf) != 0, "compile-time assertion failed"
)
231 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE,static struct sysctl_oid sysctl___kern_ipc_sema = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = ((5 | 0x80000000
| 0x00040000)), .oid_arg1 = (((void *)0)), .oid_arg2 = (0), .
oid_name = ("sema"), .oid_handler = (sysctl_sema), .oid_fmt =
(""), .oid_descr = "Array of struct semid_kernel for each potential semaphore"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_sema __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_sema); _Static_assert(((5 | 0x80000000
| 0x00040000) & 0xf) != 0, "compile-time assertion failed"
)
232 NULL, 0, sysctl_sema, "",static struct sysctl_oid sysctl___kern_ipc_sema = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = ((5 | 0x80000000
| 0x00040000)), .oid_arg1 = (((void *)0)), .oid_arg2 = (0), .
oid_name = ("sema"), .oid_handler = (sysctl_sema), .oid_fmt =
(""), .oid_descr = "Array of struct semid_kernel for each potential semaphore"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_sema __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_sema); _Static_assert(((5 | 0x80000000
| 0x00040000) & 0xf) != 0, "compile-time assertion failed"
)
233 "Array of struct semid_kernel for each potential semaphore")static struct sysctl_oid sysctl___kern_ipc_sema = { .oid_parent
= ((&(&sysctl___kern_ipc)->oid_children)), .oid_children
= { ((void *)0) }, .oid_number = ((-1)), .oid_kind = ((5 | 0x80000000
| 0x00040000)), .oid_arg1 = (((void *)0)), .oid_arg2 = (0), .
oid_name = ("sema"), .oid_handler = (sysctl_sema), .oid_fmt =
(""), .oid_descr = "Array of struct semid_kernel for each potential semaphore"
, .oid_label = (((void *)0)), }; __asm__(".globl " "__start_set_sysctl_set"
); __asm__(".globl " "__stop_set_sysctl_set"); static void const
* const __set_sysctl_set_sym_sysctl___kern_ipc_sema __attribute__
((__section__("set_" "sysctl_set"))) __attribute__((__used__)
) = &(sysctl___kern_ipc_sema); _Static_assert(((5 | 0x80000000
| 0x00040000) & 0xf) != 0, "compile-time assertion failed"
);
234
235static struct syscall_helper_data sem_syscalls[] = {
236 SYSCALL_INIT_HELPER(__semctl){ .new_sysent = { .sy_narg = (sizeof(struct __semctl_args ) /
sizeof(register_t)), .sy_call = (sy_call_t *)& sys___semctl
, .sy_auevent = 98, .sy_flags = (0) }, .syscall_no = 510 },
237 SYSCALL_INIT_HELPER(semget){ .new_sysent = { .sy_narg = (sizeof(struct semget_args ) / sizeof
(register_t)), .sy_call = (sy_call_t *)& sys_semget, .sy_auevent
= 109, .sy_flags = (0) }, .syscall_no = 221 },
238 SYSCALL_INIT_HELPER(semop){ .new_sysent = { .sy_narg = (sizeof(struct semop_args ) / sizeof
(register_t)), .sy_call = (sy_call_t *)& sys_semop, .sy_auevent
= 110, .sy_flags = (0) }, .syscall_no = 222 },
239#if defined(COMPAT_FREEBSD41) || defined(COMPAT_FREEBSD51) || \
240 defined(COMPAT_FREEBSD61) || defined(COMPAT_FREEBSD71)
241 SYSCALL_INIT_HELPER(semsys){ .new_sysent = { .sy_narg = (sizeof(struct semsys_args ) / sizeof
(register_t)), .sy_call = (sy_call_t *)& sys_semsys, .sy_auevent
= 63, .sy_flags = (0) }, .syscall_no = 169 },
242 SYSCALL_INIT_HELPER_COMPAT(freebsd7___semctl){ .new_sysent = { .sy_narg = (sizeof(struct freebsd7___semctl_args
) / sizeof(register_t)), .sy_call = (sy_call_t *)& freebsd7___semctl
, .sy_auevent = 98, .sy_flags = (0) }, .syscall_no = 220 },
243#endif
244 SYSCALL_INIT_LAST{ .syscall_no = (-1) }
245};
246
247#ifdef COMPAT_FREEBSD321
248#include <compat/freebsd32/freebsd32.h>
249#include <compat/freebsd32/freebsd32_ipc.h>
250#include <compat/freebsd32/freebsd32_proto.h>
251#include <compat/freebsd32/freebsd32_signal.h>
252#include <compat/freebsd32/freebsd32_syscall.h>
253#include <compat/freebsd32/freebsd32_util.h>
254
255static struct syscall_helper_data sem32_syscalls[] = {
256 SYSCALL32_INIT_HELPER(freebsd32_semctl){ .new_sysent = { .sy_narg = (sizeof(struct freebsd32_semctl_args
) / sizeof(register_t)), .sy_call = (sy_call_t *)& freebsd32_semctl
, .sy_flags = (0) }, .syscall_no = 510 },
257 SYSCALL32_INIT_HELPER_COMPAT(semget){ .new_sysent = { .sy_narg = (sizeof(struct semget_args ) / sizeof
(register_t)), .sy_call = (sy_call_t *)& sys_semget, .sy_flags
= (0) }, .syscall_no = 221 },
258 SYSCALL32_INIT_HELPER_COMPAT(semop){ .new_sysent = { .sy_narg = (sizeof(struct semop_args ) / sizeof
(register_t)), .sy_call = (sy_call_t *)& sys_semop, .sy_flags
= (0) }, .syscall_no = 222 },
259 SYSCALL32_INIT_HELPER(freebsd32_semsys){ .new_sysent = { .sy_narg = (sizeof(struct freebsd32_semsys_args
) / sizeof(register_t)), .sy_call = (sy_call_t *)& freebsd32_semsys
, .sy_flags = (0) }, .syscall_no = 169 },
260#if defined(COMPAT_FREEBSD41) || defined(COMPAT_FREEBSD51) || \
261 defined(COMPAT_FREEBSD61) || defined(COMPAT_FREEBSD71)
262 SYSCALL32_INIT_HELPER(freebsd7_freebsd32_semctl){ .new_sysent = { .sy_narg = (sizeof(struct freebsd7_freebsd32_semctl_args
) / sizeof(register_t)), .sy_call = (sy_call_t *)& freebsd7_freebsd32_semctl
, .sy_flags = (0) }, .syscall_no = 220 },
263#endif
264 SYSCALL_INIT_LAST{ .syscall_no = (-1) }
265};
266#endif
267
268static int
269seminit(void)
270{
271 struct prison *pr;
272 void **rsv;
273 int i, error;
274 osd_method_t methods[PR_MAXMETHOD6] = {
275 [PR_METHOD_CHECK3] = sem_prison_check,
276 [PR_METHOD_SET2] = sem_prison_set,
277 [PR_METHOD_GET1] = sem_prison_get,
278 [PR_METHOD_REMOVE5] = sem_prison_remove,
279 };
280
281 sem = malloc(sizeof(struct sem) * seminfo.semmns, M_SEM, M_WAITOK0x0002);
282 sema = malloc(sizeof(struct semid_kernel) * seminfo.semmni, M_SEM,
283 M_WAITOK0x0002 | M_ZERO0x0100);
284 sema_mtx = malloc(sizeof(struct mtx) * seminfo.semmni, M_SEM,
285 M_WAITOK0x0002 | M_ZERO0x0100);
286 semu = malloc(seminfo.semmnu * seminfo.semusz, M_SEM, M_WAITOK0x0002);
287
288 for (i = 0; i < seminfo.semmni; i++) {
289 sema[i].u.__sem_base = 0;
290 sema[i].u.sem_perm.mode = 0;
291 sema[i].u.sem_perm.seq = 0;
292#ifdef MAC1
293 mac_sysvsem_init(&sema[i]);
294#endif
295 }
296 for (i = 0; i < seminfo.semmni; i++)
297 mtx_init(&sema_mtx[i], "semid", NULL, MTX_DEF)_mtx_init(&(&sema_mtx[i])->mtx_lock, "semid", ((void
*)0), 0x00000000);
298 LIST_INIT(&semu_free_list)do { (((&semu_free_list))->lh_first) = ((void *)0); } while
(0);
299 for (i = 0; i < seminfo.semmnu; i++) {
300 struct sem_undo *suptr = SEMU(i)((struct sem_undo *)(((intptr_t)semu)+i * seminfo.semusz));
301 suptr->un_proc = NULL((void *)0);
302 LIST_INSERT_HEAD(&semu_free_list, suptr, un_next)do { do { if (((((&semu_free_list)))->lh_first) != ((void
*)0) && ((((&semu_free_list)))->lh_first)->
un_next.le_prev != &((((&semu_free_list)))->lh_first
)) panic("Bad list head %p first->prev != head", ((&semu_free_list
))); } while (0); if (((((suptr))->un_next.le_next) = (((&
semu_free_list))->lh_first)) != ((void *)0)) (((&semu_free_list
))->lh_first)->un_next.le_prev = &(((suptr))->un_next
.le_next); (((&semu_free_list))->lh_first) = (suptr); (
suptr)->un_next.le_prev = &(((&semu_free_list))->
lh_first); } while (0);
303 }
304 LIST_INIT(&semu_list)do { (((&semu_list))->lh_first) = ((void *)0); } while
(0);
305 mtx_init(&sem_mtx, "sem", NULL, MTX_DEF)_mtx_init(&(&sem_mtx)->mtx_lock, "sem", ((void *)0
), 0x00000000);
306 mtx_init(&sem_undo_mtx, "semu", NULL, MTX_DEF)_mtx_init(&(&sem_undo_mtx)->mtx_lock, "semu", ((void
*)0), 0x00000000);
307 semexit_tag = EVENTHANDLER_REGISTER(process_exit, semexit_myhook, NULL,eventhandler_register(((void *)0), "process_exit", semexit_myhook
, ((void *)0), 10000)
308 EVENTHANDLER_PRI_ANY)eventhandler_register(((void *)0), "process_exit", semexit_myhook
, ((void *)0), 10000);
309
310 /* Set current prisons according to their allow.sysvipc. */
311 sem_prison_slot = osd_jail_register(NULL, methods)osd_register(1, (((void *)0)), (methods));
312 rsv = osd_reserve(sem_prison_slot);
313 prison_lock(&prison0);
314 (void)osd_jail_set_reserved(&prison0, sem_prison_slot, rsv, &prison0)osd_set_reserved(1, &(&prison0)->pr_osd, (sem_prison_slot
), (rsv), (&prison0));
315 prison_unlock(&prison0);
316 rsv = NULL((void *)0);
317 sx_slock(&allprison_lock)(void)_sx_slock(((&allprison_lock)), 0, ("/root/freebsd/sys/kern/sysv_sem.c"
), (317));
318 TAILQ_FOREACH(pr, &allprison, pr_list)for ((pr) = (((&allprison))->tqh_first); (pr); (pr) = (
((pr))->pr_list.tqe_next)) {
319 if (rsv == NULL((void *)0))
320 rsv = osd_reserve(sem_prison_slot);
321 prison_lock(pr);
322 if ((pr->pr_allow & PR_ALLOW_SYSVIPC0x00000002) && pr->pr_ref > 0) {
323 (void)osd_jail_set_reserved(pr, sem_prison_slot, rsv,osd_set_reserved(1, &(pr)->pr_osd, (sem_prison_slot), (
rsv), (&prison0))
324 &prison0)osd_set_reserved(1, &(pr)->pr_osd, (sem_prison_slot), (
rsv), (&prison0));
325 rsv = NULL((void *)0);
326 }
327 prison_unlock(pr);
328 }
329 if (rsv != NULL((void *)0))
330 osd_free_reserved(rsv);
331 sx_sunlock(&allprison_lock)_sx_sunlock(((&allprison_lock)), ("/root/freebsd/sys/kern/sysv_sem.c"
), (331));
332
333 error = syscall_helper_register(sem_syscalls, SY_THR_STATIC_KLD0);
334 if (error != 0)
335 return (error);
336#ifdef COMPAT_FREEBSD321
337 error = syscall32_helper_register(sem32_syscalls, SY_THR_STATIC_KLD0);
338 if (error != 0)
339 return (error);
340#endif
341 return (0);
342}
343
344static int
345semunload(void)
346{
347 int i;
348
349 /* XXXKIB */
350 if (semtot != 0)
351 return (EBUSY16);
352
353#ifdef COMPAT_FREEBSD321
354 syscall32_helper_unregister(sem32_syscalls);
355#endif
356 syscall_helper_unregister(sem_syscalls);
357 EVENTHANDLER_DEREGISTER(process_exit, semexit_tag)do { struct eventhandler_list *_el; if ((_el = eventhandler_find_list
("process_exit")) != ((void *)0)) eventhandler_deregister(_el
, semexit_tag); } while(0);
358 if (sem_prison_slot != 0)
359 osd_jail_deregister(sem_prison_slot)osd_deregister(1, (sem_prison_slot));
360#ifdef MAC1
361 for (i = 0; i < seminfo.semmni; i++)
362 mac_sysvsem_destroy(&sema[i]);
363#endif
364 free(sem, M_SEM);
365 free(sema, M_SEM);
366 free(semu, M_SEM);
367 for (i = 0; i < seminfo.semmni; i++)
368 mtx_destroy(&sema_mtx[i])_mtx_destroy(&(&sema_mtx[i])->mtx_lock);
369 free(sema_mtx, M_SEM);
370 mtx_destroy(&sem_mtx)_mtx_destroy(&(&sem_mtx)->mtx_lock);
371 mtx_destroy(&sem_undo_mtx)_mtx_destroy(&(&sem_undo_mtx)->mtx_lock);
372 return (0);
373}
374
375static int
376sysvsem_modload(struct module *module, int cmd, void *arg)
377{
378 int error = 0;
379
380 switch (cmd) {
381 case MOD_LOAD:
382 error = seminit();
383 if (error != 0)
384 semunload();
385 break;
386 case MOD_UNLOAD:
387 error = semunload();
388 break;
389 case MOD_SHUTDOWN:
390 break;
391 default:
392 error = EINVAL22;
393 break;
394 }
395 return (error);
396}
397
398static moduledata_t sysvsem_mod = {
399 "sysvsem",
400 &sysvsem_modload,
401 NULL((void *)0)
402};
403
404DECLARE_MODULE(sysvsem, sysvsem_mod, SI_SUB_SYSV_SEM, SI_ORDER_FIRST)static struct mod_depend _sysvsem_depend_on_kernel __attribute__
((__section__(".data"))) = { 1300006, 1300006, 1300006 }; static
struct mod_metadata _mod_metadata_md_sysvsem_on_kernel = { 1
, 1, &_sysvsem_depend_on_kernel, "kernel" }; __asm__(".globl "
"__start_set_modmetadata_set"); __asm__(".globl " "__stop_set_modmetadata_set"
); static void const * const __set_modmetadata_set_sym__mod_metadata_md_sysvsem_on_kernel
__attribute__((__section__("set_" "modmetadata_set"))) __attribute__
((__used__)) = &(_mod_metadata_md_sysvsem_on_kernel); static
struct mod_metadata _mod_metadata_md_sysvsem = { 1, 2, &
sysvsem_mod, "sysvsem" }; __asm__(".globl " "__start_set_modmetadata_set"
); __asm__(".globl " "__stop_set_modmetadata_set"); static void
const * const __set_modmetadata_set_sym__mod_metadata_md_sysvsem
__attribute__((__section__("set_" "modmetadata_set"))) __attribute__
((__used__)) = &(_mod_metadata_md_sysvsem); static struct
sysinit sysvsemmodule_sys_init = { SI_SUB_SYSV_SEM, SI_ORDER_FIRST
, (sysinit_cfunc_t)(sysinit_nfunc_t)module_register_init, ((void
*)(&sysvsem_mod)) }; __asm__(".globl " "__start_set_sysinit_set"
); __asm__(".globl " "__stop_set_sysinit_set"); static void const
* __set_sysinit_set_sym_sysvsemmodule_sys_init __attribute__
((__section__("set_" "sysinit_set"))) __attribute__((__used__
)) = &(sysvsemmodule_sys_init); struct __hack;
405MODULE_VERSION(sysvsem, 1)static struct mod_version _sysvsem_version __attribute__((__section__
(".data"))) = { 1 }; static struct mod_metadata _mod_metadata_sysvsem_version
= { 1, 3, &_sysvsem_version, "sysvsem" }; __asm__(".globl "
"__start_set_modmetadata_set"); __asm__(".globl " "__stop_set_modmetadata_set"
); static void const * const __set_modmetadata_set_sym__mod_metadata_sysvsem_version
__attribute__((__section__("set_" "modmetadata_set"))) __attribute__
((__used__)) = &(_mod_metadata_sysvsem_version);
406
407/*
408 * Allocate a new sem_undo structure for a process
409 * (returns ptr to structure or NULL if no more room)
410 */
411
412static struct sem_undo *
413semu_alloc(struct thread *td)
414{
415 struct sem_undo *suptr;
416
417 SEMUNDO_LOCKASSERT(MA_OWNED)__mtx_assert(&(((&sem_undo_mtx)))->mtx_lock, (((0x00000004
))), ("/root/freebsd/sys/kern/sysv_sem.c"), (417));;
418 if ((suptr = LIST_FIRST(&semu_free_list)((&semu_free_list)->lh_first)) == NULL((void *)0))
419 return (NULL((void *)0));
420 LIST_REMOVE(suptr, un_next)do { ; ; do { if ((((suptr))->un_next.le_next) != ((void *
)0) && (((suptr))->un_next.le_next)->un_next.le_prev
!= &((suptr)->un_next.le_next)) panic("Bad link elm %p next->prev != elm"
, (suptr)); } while (0); do { if (*(suptr)->un_next.le_prev
!= (suptr)) panic("Bad link elm %p prev->next != elm", (suptr
)); } while (0); if ((((suptr))->un_next.le_next) != ((void
*)0)) (((suptr))->un_next.le_next)->un_next.le_prev = (
suptr)->un_next.le_prev; *(suptr)->un_next.le_prev = ((
(suptr))->un_next.le_next); ; ; } while (0);
421 LIST_INSERT_HEAD(&semu_list, suptr, un_next)do { do { if (((((&semu_list)))->lh_first) != ((void *
)0) && ((((&semu_list)))->lh_first)->un_next
.le_prev != &((((&semu_list)))->lh_first)) panic("Bad list head %p first->prev != head"
, ((&semu_list))); } while (0); if (((((suptr))->un_next
.le_next) = (((&semu_list))->lh_first)) != ((void *)0)
) (((&semu_list))->lh_first)->un_next.le_prev = &
(((suptr))->un_next.le_next); (((&semu_list))->lh_first
) = (suptr); (suptr)->un_next.le_prev = &(((&semu_list
))->lh_first); } while (0);
422 suptr->un_cnt = 0;
423 suptr->un_proc = td->td_proc;
424 return (suptr);
425}
426
427static int
428semu_try_free(struct sem_undo *suptr)
429{
430
431 SEMUNDO_LOCKASSERT(MA_OWNED)__mtx_assert(&(((&sem_undo_mtx)))->mtx_lock, (((0x00000004
))), ("/root/freebsd/sys/kern/sysv_sem.c"), (431));;
432
433 if (suptr->un_cnt != 0)
434 return (0);
435 LIST_REMOVE(suptr, un_next)do { ; ; do { if ((((suptr))->un_next.le_next) != ((void *
)0) && (((suptr))->un_next.le_next)->un_next.le_prev
!= &((suptr)->un_next.le_next)) panic("Bad link elm %p next->prev != elm"
, (suptr)); } while (0); do { if (*(suptr)->un_next.le_prev
!= (suptr)) panic("Bad link elm %p prev->next != elm", (suptr
)); } while (0); if ((((suptr))->un_next.le_next) != ((void
*)0)) (((suptr))->un_next.le_next)->un_next.le_prev = (
suptr)->un_next.le_prev; *(suptr)->un_next.le_prev = ((
(suptr))->un_next.le_next); ; ; } while (0);
436 LIST_INSERT_HEAD(&semu_free_list, suptr, un_next)do { do { if (((((&semu_free_list)))->lh_first) != ((void
*)0) && ((((&semu_free_list)))->lh_first)->
un_next.le_prev != &((((&semu_free_list)))->lh_first
)) panic("Bad list head %p first->prev != head", ((&semu_free_list
))); } while (0); if (((((suptr))->un_next.le_next) = (((&
semu_free_list))->lh_first)) != ((void *)0)) (((&semu_free_list
))->lh_first)->un_next.le_prev = &(((suptr))->un_next
.le_next); (((&semu_free_list))->lh_first) = (suptr); (
suptr)->un_next.le_prev = &(((&semu_free_list))->
lh_first); } while (0);
437 return (1);
438}
439
440/*
441 * Adjust a particular entry for a particular proc
442 */
443
444static int
445semundo_adjust(struct thread *td, struct sem_undo **supptr, int semid,
446 int semseq, int semnum, int adjval)
447{
448 struct proc *p = td->td_proc;
449 struct sem_undo *suptr;
450 struct undo *sunptr;
451 int i;
452
453 SEMUNDO_LOCKASSERT(MA_OWNED)__mtx_assert(&(((&sem_undo_mtx)))->mtx_lock, (((0x00000004
))), ("/root/freebsd/sys/kern/sysv_sem.c"), (453));;
454 /* Look for and remember the sem_undo if the caller doesn't provide
455 it */
456
457 suptr = *supptr;
458 if (suptr == NULL((void *)0)) {
459 LIST_FOREACH(suptr, &semu_list, un_next)for ((suptr) = (((&semu_list))->lh_first); (suptr); (suptr
) = (((suptr))->un_next.le_next)) {
460 if (suptr->un_proc == p) {
461 *supptr = suptr;
462 break;
463 }
464 }
465 if (suptr == NULL((void *)0)) {
466 if (adjval == 0)
467 return(0);
468 suptr = semu_alloc(td);
469 if (suptr == NULL((void *)0))
470 return (ENOSPC28);
471 *supptr = suptr;
472 }
473 }
474
475 /*
476 * Look for the requested entry and adjust it (delete if adjval becomes
477 * 0).
478 */
479 sunptr = &suptr->un_ent[0];
480 for (i = 0; i < suptr->un_cnt; i++, sunptr++) {
481 if (sunptr->un_id != semid || sunptr->un_num != semnum)
482 continue;
483 if (adjval != 0) {
484 adjval += sunptr->un_adjval;
485 if (adjval > seminfo.semaem || adjval < -seminfo.semaem)
486 return (ERANGE34);
487 }
488 sunptr->un_adjval = adjval;
489 if (sunptr->un_adjval == 0) {
490 suptr->un_cnt--;
491 if (i < suptr->un_cnt)
492 suptr->un_ent[i] =
493 suptr->un_ent[suptr->un_cnt];
494 if (suptr->un_cnt == 0)
495 semu_try_free(suptr);
496 }
497 return (0);
498 }
499
500 /* Didn't find the right entry - create it */
501 if (adjval == 0)
502 return (0);
503 if (adjval > seminfo.semaem || adjval < -seminfo.semaem)
504 return (ERANGE34);
505 if (suptr->un_cnt != seminfo.semume) {
506 sunptr = &suptr->un_ent[suptr->un_cnt];
507 suptr->un_cnt++;
508 sunptr->un_adjval = adjval;
509 sunptr->un_id = semid;
510 sunptr->un_num = semnum;
511 sunptr->un_seq = semseq;
512 } else
513 return (EINVAL22);
514 return (0);
515}
516
517static void
518semundo_clear(int semid, int semnum)
519{
520 struct sem_undo *suptr, *suptr1;
521 struct undo *sunptr;
522 int i;
523
524 SEMUNDO_LOCKASSERT(MA_OWNED)__mtx_assert(&(((&sem_undo_mtx)))->mtx_lock, (((0x00000004
))), ("/root/freebsd/sys/kern/sysv_sem.c"), (524));;
525 LIST_FOREACH_SAFE(suptr, &semu_list, un_next, suptr1)for ((suptr) = (((&semu_list))->lh_first); (suptr) &&
((suptr1) = (((suptr))->un_next.le_next), 1); (suptr) = (
suptr1)) {
526 sunptr = &suptr->un_ent[0];
527 for (i = 0; i < suptr->un_cnt; i++, sunptr++) {
528 if (sunptr->un_id != semid)
529 continue;
530 if (semnum == -1 || sunptr->un_num == semnum) {
531 suptr->un_cnt--;
532 if (i < suptr->un_cnt) {
533 suptr->un_ent[i] =
534 suptr->un_ent[suptr->un_cnt];
535 continue;
536 }
537 semu_try_free(suptr);
538 }
539 if (semnum != -1)
540 break;
541 }
542 }
543}
544
545static int
546semvalid(int semid, struct prison *rpr, struct semid_kernel *semakptr)
547{
548
549 return ((semakptr->u.sem_perm.mode & SEM_ALLOC01000) == 0 ||
550 semakptr->u.sem_perm.seq != IPCID_TO_SEQ(semid)(((semid) >> 16) & 0xffff) ||
551 sem_prison_cansee(rpr, semakptr) ? EINVAL22 : 0);
552}
553
554static void
555sem_remove(int semidx, struct ucred *cred)
556{
557 struct semid_kernel *semakptr;
558 int i;
559
560 KASSERT(semidx >= 0 && semidx < seminfo.semmni,do { if (__builtin_expect((!(semidx >= 0 && semidx
< seminfo.semmni)), 0)) panic ("semidx out of bounds"); }
while (0)
561 ("semidx out of bounds"))do { if (__builtin_expect((!(semidx >= 0 && semidx
< seminfo.semmni)), 0)) panic ("semidx out of bounds"); }
while (0);
562 semakptr = &sema[semidx];
563 semakptr->u.sem_perm.cuid = cred ? cred->cr_uid : 0;
564 semakptr->u.sem_perm.uid = cred ? cred->cr_uid : 0;
565 semakptr->u.sem_perm.mode = 0;
566 racct_sub_cred(semakptr->cred, RACCT_NSEM15, semakptr->u.sem_nsems);
567 crfree(semakptr->cred);
568 semakptr->cred = NULL((void *)0);
569 SEMUNDO_LOCK()__mtx_lock_flags(&((((&sem_undo_mtx))))->mtx_lock,
((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (569));;
570 semundo_clear(semidx, -1);
571 SEMUNDO_UNLOCK()__mtx_unlock_flags(&((((&sem_undo_mtx))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (571));;
572#ifdef MAC1
573 mac_sysvsem_cleanup(semakptr);
574#endif
575 wakeup(semakptr);
576 for (i = 0; i < seminfo.semmni; i++) {
577 if ((sema[i].u.sem_perm.mode & SEM_ALLOC01000) &&
578 sema[i].u.__sem_base > semakptr->u.__sem_base)
579 mtx_lock_flags(&sema_mtx[i], LOP_DUPOK)__mtx_lock_flags(&(((&sema_mtx[i])))->mtx_lock, ((
0x00000010)), ("/root/freebsd/sys/kern/sysv_sem.c"), (579));
580 }
581 for (i = semakptr->u.__sem_base - sem; i < semtot; i++)
582 sem[i] = sem[i + semakptr->u.sem_nsems];
583 for (i = 0; i < seminfo.semmni; i++) {
584 if ((sema[i].u.sem_perm.mode & SEM_ALLOC01000) &&
585 sema[i].u.__sem_base > semakptr->u.__sem_base) {
586 sema[i].u.__sem_base -= semakptr->u.sem_nsems;
587 mtx_unlock(&sema_mtx[i])__mtx_unlock_flags(&((((&sema_mtx[i]))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (587));
588 }
589 }
590 semtot -= semakptr->u.sem_nsems;
591}
592
593static struct prison *
594sem_find_prison(struct ucred *cred)
595{
596 struct prison *pr, *rpr;
597
598 pr = cred->cr_prison;
599 prison_lock(pr);
600 rpr = osd_jail_get(pr, sem_prison_slot)osd_get(1, &(pr)->pr_osd, (sem_prison_slot));
601 prison_unlock(pr);
602 return rpr;
603}
604
605static int
606sem_prison_cansee(struct prison *rpr, struct semid_kernel *semakptr)
607{
608
609 if (semakptr->cred == NULL((void *)0) ||
610 !(rpr == semakptr->cred->cr_prison ||
611 prison_ischild(rpr, semakptr->cred->cr_prison)))
612 return (EINVAL22);
613 return (0);
614}
615
616/*
617 * Note that the user-mode half of this passes a union, not a pointer.
618 */
619#ifndef _SYS_SYSPROTO_H_
620struct __semctl_args {
621 int semid;
622 int semnum;
623 int cmd;
624 union semun *arg;
625};
626#endif
627int
628sys___semctl(struct thread *td, struct __semctl_args *uap)
629{
630 struct semid_ds dsbuf;
631 union semun arg, semun;
632 register_t rval;
633 int error;
634
635 switch (uap->cmd) {
1
Control jumps to 'case 2:' at line 638
→
636 case SEM_STAT10:
637 case IPC_SET1:
638 case IPC_STAT2:
639 case GETALL6:
640 case SETVAL8:
641 case SETALL9:
642 error = copyin(uap->arg, &arg, sizeof(arg));
643 if (error)
2
←
Assuming 'error' is 0
→
3
←
Taking false branch
→
644 return (error);
645 break;
4
←
 Execution continues on line 648
→
646 }
647
648 switch (uap->cmd) {
5
←
Control jumps to 'case 2:' at line 650
→
649 case SEM_STAT10:
650 case IPC_STAT2:
651 semun.buf = &dsbuf;
652 break;
6
←
 Execution continues on line 668
→
653 case IPC_SET1:
654 error = copyin(arg.buf, &dsbuf, sizeof(dsbuf));
655 if (error)
656 return (error);
657 semun.buf = &dsbuf;
658 break;
659 case GETALL6:
660 case SETALL9:
661 semun.array = arg.array;
662 break;
663 case SETVAL8:
664 semun.val = arg.val;
665 break;
666 }
667
668 error = kern_semctl(td, uap->semid, uap->semnum, uap->cmd, &semun,
669 &rval);
670 if (error)
7
←
Assuming 'error' is 0
→
8
←
Taking false branch
→
671 return (error);
672
673 switch (uap->cmd) {
9
←
Control jumps to 'case 2:' at line 675
→
674 case SEM_STAT10:
675 case IPC_STAT2:
676 error = copyout(&dsbuf, arg.buf, sizeof(dsbuf));
10
←
Copies out a struct with uncleared padding (>= 6 bytes)
677 break;
678 }
679
680 if (error == 0)
681 td->td_retvaltd_uretoff.tdu_retval[0] = rval;
682 return (error);
683}
684
685int
686kern_semctl(struct thread *td, int semid, int semnum, int cmd,
687 union semun *arg, register_t *rval)
688{
689 u_short *array;
690 struct ucred *cred = td->td_ucred;
691 int i, error;
692 struct prison *rpr;
693 struct semid_ds *sbuf;
694 struct semid_kernel *semakptr;
695 struct mtx *sema_mtxp;
696 u_short usval, count;
697 int semidx;
698
699 DPRINTF(("call to semctl(%d, %d, %d, 0x%p)\n",
700 semid, semnum, cmd, arg));
701
702 AUDIT_ARG_SVIPC_CMD(cmd)do { if ((__builtin_expect((((__curthread()))->td_pflags &
0x01000000), 0))) audit_arg_svipc_cmd((cmd)); } while (0);
703 AUDIT_ARG_SVIPC_ID(semid)do { if ((__builtin_expect((((__curthread()))->td_pflags &
0x01000000), 0))) audit_arg_svipc_id((semid)); } while (0);
704
705 rpr = sem_find_prison(td->td_ucred);
706 if (sem == NULL((void *)0))
707 return (ENOSYS78);
708
709 array = NULL((void *)0);
710
711 switch(cmd) {
712 case SEM_STAT10:
713 /*
714 * For this command we assume semid is an array index
715 * rather than an IPC id.
716 */
717 if (semid < 0 || semid >= seminfo.semmni)
718 return (EINVAL22);
719 semakptr = &sema[semid];
720 sema_mtxp = &sema_mtx[semid];
721 mtx_lock(sema_mtxp)__mtx_lock_flags(&((((sema_mtxp))))->mtx_lock, ((0)), (
"/root/freebsd/sys/kern/sysv_sem.c"), (721));
722 if ((semakptr->u.sem_perm.mode & SEM_ALLOC01000) == 0) {
723 error = EINVAL22;
724 goto done2;
725 }
726 if ((error = sem_prison_cansee(rpr, semakptr)))
727 goto done2;
728 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_R000400)))
729 goto done2;
730#ifdef MAC1
731 error = mac_sysvsem_check_semctl(cred, semakptr, cmd);
732 if (error != 0)
733 goto done2;
734#endif
735 bcopy(&semakptr->u, arg->buf, sizeof(struct semid_ds))__builtin_memmove((arg->buf), (&semakptr->u), (sizeof
(struct semid_ds)));
736 if (cred->cr_prison != semakptr->cred->cr_prison)
737 arg->buf->sem_perm.key = IPC_PRIVATE(key_t)0;
738 *rval = IXSEQ_TO_IPCID(semid, semakptr->u.sem_perm)(((semakptr->u.sem_perm.seq) << 16) | (semid & 0xffff
));
739 mtx_unlock(sema_mtxp)__mtx_unlock_flags(&((((sema_mtxp))))->mtx_lock, ((0))
, ("/root/freebsd/sys/kern/sysv_sem.c"), (739));
740 return (0);
741 }
742
743 semidx = IPCID_TO_IX(semid)((semid) & 0xffff);
744 if (semidx < 0 || semidx >= seminfo.semmni)
745 return (EINVAL22);
746
747 semakptr = &sema[semidx];
748 sema_mtxp = &sema_mtx[semidx];
749 if (cmd == IPC_RMID0)
750 mtx_lock(&sem_mtx)__mtx_lock_flags(&((((&sem_mtx))))->mtx_lock, ((0)
), ("/root/freebsd/sys/kern/sysv_sem.c"), (750));
751 mtx_lock(sema_mtxp)__mtx_lock_flags(&((((sema_mtxp))))->mtx_lock, ((0)), (
"/root/freebsd/sys/kern/sysv_sem.c"), (751));
752
753#ifdef MAC1
754 error = mac_sysvsem_check_semctl(cred, semakptr, cmd);
755 if (error != 0)
756 goto done2;
757#endif
758
759 error = 0;
760 *rval = 0;
761
762 switch (cmd) {
763 case IPC_RMID0:
764 if ((error = semvalid(semid, rpr, semakptr)) != 0)
765 goto done2;
766 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_M010000)))
767 goto done2;
768 sem_remove(semidx, cred);
769 break;
770
771 case IPC_SET1:
772 AUDIT_ARG_SVIPC_PERM(&arg->buf->sem_perm)do { if ((__builtin_expect((((__curthread()))->td_pflags &
0x01000000), 0))) audit_arg_svipc_perm((&arg->buf->
sem_perm)); } while (0);
773 if ((error = semvalid(semid, rpr, semakptr)) != 0)
774 goto done2;
775 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_M010000)))
776 goto done2;
777 sbuf = arg->buf;
778 semakptr->u.sem_perm.uid = sbuf->sem_perm.uid;
779 semakptr->u.sem_perm.gid = sbuf->sem_perm.gid;
780 semakptr->u.sem_perm.mode = (semakptr->u.sem_perm.mode &
781 ~0777) | (sbuf->sem_perm.mode & 0777);
782 semakptr->u.sem_ctime = time_second;
783 break;
784
785 case IPC_STAT2:
786 if ((error = semvalid(semid, rpr, semakptr)) != 0)
787 goto done2;
788 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_R000400)))
789 goto done2;
790 bcopy(&semakptr->u, arg->buf, sizeof(struct semid_ds))__builtin_memmove((arg->buf), (&semakptr->u), (sizeof
(struct semid_ds)));
791 if (cred->cr_prison != semakptr->cred->cr_prison)
792 arg->buf->sem_perm.key = IPC_PRIVATE(key_t)0;
793 break;
794
795 case GETNCNT3:
796 if ((error = semvalid(semid, rpr, semakptr)) != 0)
797 goto done2;
798 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_R000400)))
799 goto done2;
800 if (semnum < 0 || semnum >= semakptr->u.sem_nsems) {
801 error = EINVAL22;
802 goto done2;
803 }
804 *rval = semakptr->u.__sem_base[semnum].semncnt;
805 break;
806
807 case GETPID4:
808 if ((error = semvalid(semid, rpr, semakptr)) != 0)
809 goto done2;
810 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_R000400)))
811 goto done2;
812 if (semnum < 0 || semnum >= semakptr->u.sem_nsems) {
813 error = EINVAL22;
814 goto done2;
815 }
816 *rval = semakptr->u.__sem_base[semnum].sempid;
817 break;
818
819 case GETVAL5:
820 if ((error = semvalid(semid, rpr, semakptr)) != 0)
821 goto done2;
822 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_R000400)))
823 goto done2;
824 if (semnum < 0 || semnum >= semakptr->u.sem_nsems) {
825 error = EINVAL22;
826 goto done2;
827 }
828 *rval = semakptr->u.__sem_base[semnum].semval;
829 break;
830
831 case GETALL6:
832 /*
833 * Unfortunately, callers of this function don't know
834 * in advance how many semaphores are in this set.
835 * While we could just allocate the maximum size array
836 * and pass the actual size back to the caller, that
837 * won't work for SETALL since we can't copyin() more
838 * data than the user specified as we may return a
839 * spurious EFAULT.
840 *
841 * Note that the number of semaphores in a set is
842 * fixed for the life of that set. The only way that
843 * the 'count' could change while are blocked in
844 * malloc() is if this semaphore set were destroyed
845 * and a new one created with the same index.
846 * However, semvalid() will catch that due to the
847 * sequence number unless exactly 0x8000 (or a
848 * multiple thereof) semaphore sets for the same index
849 * are created and destroyed while we are in malloc!
850 *
851 */
852 count = semakptr->u.sem_nsems;
853 mtx_unlock(sema_mtxp)__mtx_unlock_flags(&((((sema_mtxp))))->mtx_lock, ((0))
, ("/root/freebsd/sys/kern/sysv_sem.c"), (853));
854 array = malloc(sizeof(*array) * count, M_TEMP, M_WAITOK0x0002);
855 mtx_lock(sema_mtxp)__mtx_lock_flags(&((((sema_mtxp))))->mtx_lock, ((0)), (
"/root/freebsd/sys/kern/sysv_sem.c"), (855));
856 if ((error = semvalid(semid, rpr, semakptr)) != 0)
857 goto done2;
858 KASSERT(count == semakptr->u.sem_nsems, ("nsems changed"))do { if (__builtin_expect((!(count == semakptr->u.sem_nsems
)), 0)) panic ("nsems changed"); } while (0);
859 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_R000400)))
860 goto done2;
861 for (i = 0; i < semakptr->u.sem_nsems; i++)
862 array[i] = semakptr->u.__sem_base[i].semval;
863 mtx_unlock(sema_mtxp)__mtx_unlock_flags(&((((sema_mtxp))))->mtx_lock, ((0))
, ("/root/freebsd/sys/kern/sysv_sem.c"), (863));
864 error = copyout(array, arg->array, count * sizeof(*array));
865 mtx_lock(sema_mtxp)__mtx_lock_flags(&((((sema_mtxp))))->mtx_lock, ((0)), (
"/root/freebsd/sys/kern/sysv_sem.c"), (865));
866 break;
867
868 case GETZCNT7:
869 if ((error = semvalid(semid, rpr, semakptr)) != 0)
870 goto done2;
871 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_R000400)))
872 goto done2;
873 if (semnum < 0 || semnum >= semakptr->u.sem_nsems) {
874 error = EINVAL22;
875 goto done2;
876 }
877 *rval = semakptr->u.__sem_base[semnum].semzcnt;
878 break;
879
880 case SETVAL8:
881 if ((error = semvalid(semid, rpr, semakptr)) != 0)
882 goto done2;
883 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_W000200)))
884 goto done2;
885 if (semnum < 0 || semnum >= semakptr->u.sem_nsems) {
886 error = EINVAL22;
887 goto done2;
888 }
889 if (arg->val < 0 || arg->val > seminfo.semvmx) {
890 error = ERANGE34;
891 goto done2;
892 }
893 semakptr->u.__sem_base[semnum].semval = arg->val;
894 SEMUNDO_LOCK()__mtx_lock_flags(&((((&sem_undo_mtx))))->mtx_lock,
((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (894));;
895 semundo_clear(semidx, semnum);
896 SEMUNDO_UNLOCK()__mtx_unlock_flags(&((((&sem_undo_mtx))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (896));;
897 wakeup(semakptr);
898 break;
899
900 case SETALL9:
901 /*
902 * See comment on GETALL for why 'count' shouldn't change
903 * and why we require a userland buffer.
904 */
905 count = semakptr->u.sem_nsems;
906 mtx_unlock(sema_mtxp)__mtx_unlock_flags(&((((sema_mtxp))))->mtx_lock, ((0))
, ("/root/freebsd/sys/kern/sysv_sem.c"), (906));
907 array = malloc(sizeof(*array) * count, M_TEMP, M_WAITOK0x0002);
908 error = copyin(arg->array, array, count * sizeof(*array));
909 mtx_lock(sema_mtxp)__mtx_lock_flags(&((((sema_mtxp))))->mtx_lock, ((0)), (
"/root/freebsd/sys/kern/sysv_sem.c"), (909));
910 if (error)
911 break;
912 if ((error = semvalid(semid, rpr, semakptr)) != 0)
913 goto done2;
914 KASSERT(count == semakptr->u.sem_nsems, ("nsems changed"))do { if (__builtin_expect((!(count == semakptr->u.sem_nsems
)), 0)) panic ("nsems changed"); } while (0);
915 if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_W000200)))
916 goto done2;
917 for (i = 0; i < semakptr->u.sem_nsems; i++) {
918 usval = array[i];
919 if (usval > seminfo.semvmx) {
920 error = ERANGE34;
921 break;
922 }
923 semakptr->u.__sem_base[i].semval = usval;
924 }
925 SEMUNDO_LOCK()__mtx_lock_flags(&((((&sem_undo_mtx))))->mtx_lock,
((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (925));;
926 semundo_clear(semidx, -1);
927 SEMUNDO_UNLOCK()__mtx_unlock_flags(&((((&sem_undo_mtx))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (927));;
928 wakeup(semakptr);
929 break;
930
931 default:
932 error = EINVAL22;
933 break;
934 }
935
936done2:
937 mtx_unlock(sema_mtxp)__mtx_unlock_flags(&((((sema_mtxp))))->mtx_lock, ((0))
, ("/root/freebsd/sys/kern/sysv_sem.c"), (937));
938 if (cmd == IPC_RMID0)
939 mtx_unlock(&sem_mtx)__mtx_unlock_flags(&((((&sem_mtx))))->mtx_lock, ((
0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (939));
940 if (array != NULL((void *)0))
941 free(array, M_TEMP);
942 return(error);
943}
944
945#ifndef _SYS_SYSPROTO_H_
946struct semget_args {
947 key_t key;
948 int nsems;
949 int semflg;
950};
951#endif
952int
953sys_semget(struct thread *td, struct semget_args *uap)
954{
955 int semid, error = 0;
956 int key = uap->key;
957 int nsems = uap->nsems;
958 int semflg = uap->semflg;
959 struct ucred *cred = td->td_ucred;
960
961 DPRINTF(("semget(0x%x, %d, 0%o)\n", key, nsems, semflg));
962
963 AUDIT_ARG_VALUE(semflg)do { if ((__builtin_expect((((__curthread()))->td_pflags &
0x01000000), 0))) audit_arg_value((semflg)); } while (0);
964
965 if (sem_find_prison(cred) == NULL((void *)0))
966 return (ENOSYS78);
967
968 mtx_lock(&sem_mtx)__mtx_lock_flags(&((((&sem_mtx))))->mtx_lock, ((0)
), ("/root/freebsd/sys/kern/sysv_sem.c"), (968));
969 if (key != IPC_PRIVATE(key_t)0) {
970 for (semid = 0; semid < seminfo.semmni; semid++) {
971 if ((sema[semid].u.sem_perm.mode & SEM_ALLOC01000) &&
972 sema[semid].cred != NULL((void *)0) &&
973 sema[semid].cred->cr_prison == cred->cr_prison &&
974 sema[semid].u.sem_perm.key == key)
975 break;
976 }
977 if (semid < seminfo.semmni) {
978 AUDIT_ARG_SVIPC_ID(semid)do { if ((__builtin_expect((((__curthread()))->td_pflags &
0x01000000), 0))) audit_arg_svipc_id((semid)); } while (0);
979 DPRINTF(("found public key\n"));
980 if ((semflg & IPC_CREAT001000) && (semflg & IPC_EXCL002000)) {
981 DPRINTF(("not exclusive\n"));
982 error = EEXIST17;
983 goto done2;
984 }
985 if ((error = ipcperm(td, &sema[semid].u.sem_perm,
986 semflg & 0700))) {
987 goto done2;
988 }
989 if (nsems > 0 && sema[semid].u.sem_nsems < nsems) {
990 DPRINTF(("too small\n"));
991 error = EINVAL22;
992 goto done2;
993 }
994#ifdef MAC1
995 error = mac_sysvsem_check_semget(cred, &sema[semid]);
996 if (error != 0)
997 goto done2;
998#endif
999 goto found;
1000 }
1001 }
1002
1003 DPRINTF(("need to allocate the semid_kernel\n"));
1004 if (key == IPC_PRIVATE(key_t)0 || (semflg & IPC_CREAT001000)) {
1005 if (nsems <= 0 || nsems > seminfo.semmsl) {
1006 DPRINTF(("nsems out of range (0<%d<=%d)\n", nsems,
1007 seminfo.semmsl));
1008 error = EINVAL22;
1009 goto done2;
1010 }
1011 if (nsems > seminfo.semmns - semtot) {
1012 DPRINTF((
1013 "not enough semaphores left (need %d, got %d)\n",
1014 nsems, seminfo.semmns - semtot));
1015 error = ENOSPC28;
1016 goto done2;
1017 }
1018 for (semid = 0; semid < seminfo.semmni; semid++) {
1019 if ((sema[semid].u.sem_perm.mode & SEM_ALLOC01000) == 0)
1020 break;
1021 }
1022 if (semid == seminfo.semmni) {
1023 DPRINTF(("no more semid_kernel's available\n"));
1024 error = ENOSPC28;
1025 goto done2;
1026 }
1027#ifdef RACCT1
1028 if (racct_enable) {
1029 PROC_LOCK(td->td_proc)__mtx_lock_flags(&((((&(td->td_proc)->p_mtx))))
->mtx_lock, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (
1029));
1030 error = racct_add(td->td_proc, RACCT_NSEM15, nsems);
1031 PROC_UNLOCK(td->td_proc)__mtx_unlock_flags(&((((&(td->td_proc)->p_mtx))
))->mtx_lock, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c")
, (1031));
1032 if (error != 0) {
1033 error = ENOSPC28;
1034 goto done2;
1035 }
1036 }
1037#endif
1038 DPRINTF(("semid %d is available\n", semid));
1039 mtx_lock(&sema_mtx[semid])__mtx_lock_flags(&((((&sema_mtx[semid]))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1039));
1040 KASSERT((sema[semid].u.sem_perm.mode & SEM_ALLOC) == 0,do { if (__builtin_expect((!((sema[semid].u.sem_perm.mode &
01000) == 0)), 0)) panic ("Lost semaphore %d", semid); } while
(0)
1041 ("Lost semaphore %d", semid))do { if (__builtin_expect((!((sema[semid].u.sem_perm.mode &
01000) == 0)), 0)) panic ("Lost semaphore %d", semid); } while
(0);
1042 sema[semid].u.sem_perm.key = key;
1043 sema[semid].u.sem_perm.cuid = cred->cr_uid;
1044 sema[semid].u.sem_perm.uid = cred->cr_uid;
1045 sema[semid].u.sem_perm.cgid = cred->cr_gidcr_groups[0];
1046 sema[semid].u.sem_perm.gid = cred->cr_gidcr_groups[0];
1047 sema[semid].u.sem_perm.mode = (semflg & 0777) | SEM_ALLOC01000;
1048 sema[semid].cred = crhold(cred);
1049 sema[semid].u.sem_perm.seq =
1050 (sema[semid].u.sem_perm.seq + 1) & 0x7fff;
1051 sema[semid].u.sem_nsems = nsems;
1052 sema[semid].u.sem_otime = 0;
1053 sema[semid].u.sem_ctime = time_second;
1054 sema[semid].u.__sem_base = &sem[semtot];
1055 semtot += nsems;
1056 bzero(sema[semid].u.__sem_base,__builtin_memset((sema[semid].u.__sem_base), 0, (sizeof(sema[
semid].u.__sem_base[0])*nsems))
1057 sizeof(sema[semid].u.__sem_base[0])*nsems)__builtin_memset((sema[semid].u.__sem_base), 0, (sizeof(sema[
semid].u.__sem_base[0])*nsems));
1058#ifdef MAC1
1059 mac_sysvsem_create(cred, &sema[semid]);
1060#endif
1061 mtx_unlock(&sema_mtx[semid])__mtx_unlock_flags(&((((&sema_mtx[semid]))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1061));
1062 DPRINTF(("sembase = %p, next = %p\n",
1063 sema[semid].u.__sem_base, &sem[semtot]));
1064 } else {
1065 DPRINTF(("didn't find it and wasn't asked to create it\n"));
1066 error = ENOENT2;
1067 goto done2;
1068 }
1069
1070found:
1071 td->td_retvaltd_uretoff.tdu_retval[0] = IXSEQ_TO_IPCID(semid, sema[semid].u.sem_perm)(((sema[semid].u.sem_perm.seq) << 16) | (semid & 0xffff
));
1072done2:
1073 mtx_unlock(&sem_mtx)__mtx_unlock_flags(&((((&sem_mtx))))->mtx_lock, ((
0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1073));
1074 return (error);
1075}
1076
1077#ifndef _SYS_SYSPROTO_H_
1078struct semop_args {
1079 int semid;
1080 struct sembuf *sops;
1081 size_t nsops;
1082};
1083#endif
1084int
1085sys_semop(struct thread *td, struct semop_args *uap)
1086{
1087#define SMALL_SOPS8 8
1088 struct sembuf small_sops[SMALL_SOPS8];
1089 int semid = uap->semid;
1090 size_t nsops = uap->nsops;
1091 struct prison *rpr;
1092 struct sembuf *sops;
1093 struct semid_kernel *semakptr;
1094 struct sembuf *sopptr = NULL((void *)0);
1095 struct sem *semptr = NULL((void *)0);
1096 struct sem_undo *suptr;
1097 struct mtx *sema_mtxp;
1098 size_t i, j, k;
1099 int error;
1100 int do_wakeup, do_undos;
1101 unsigned short seq;
1102
1103#ifdef SEM_DEBUG
1104 sops = NULL((void *)0);
1105#endif
1106 DPRINTF(("call to semop(%d, %p, %u)\n", semid, sops, nsops));
1107
1108 AUDIT_ARG_SVIPC_ID(semid)do { if ((__builtin_expect((((__curthread()))->td_pflags &
0x01000000), 0))) audit_arg_svipc_id((semid)); } while (0);
1109
1110 rpr = sem_find_prison(td->td_ucred);
1111 if (sem == NULL((void *)0))
1112 return (ENOSYS78);
1113
1114 semid = IPCID_TO_IX(semid)((semid) & 0xffff); /* Convert back to zero origin */
1115
1116 if (semid < 0 || semid >= seminfo.semmni)
1117 return (EINVAL22);
1118
1119 /* Allocate memory for sem_ops */
1120 if (nsops <= SMALL_SOPS8)
1121 sops = small_sops;
1122 else if (nsops > seminfo.semopm) {
1123 DPRINTF(("too many sops (max=%d, nsops=%d)\n", seminfo.semopm,
1124 nsops));
1125 return (E2BIG7);
1126 } else {
1127#ifdef RACCT1
1128 if (racct_enable) {
1129 PROC_LOCK(td->td_proc)__mtx_lock_flags(&((((&(td->td_proc)->p_mtx))))
->mtx_lock, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (
1129));
1130 if (nsops >
1131 racct_get_available(td->td_proc, RACCT_NSEMOP16)) {
1132 PROC_UNLOCK(td->td_proc)__mtx_unlock_flags(&((((&(td->td_proc)->p_mtx))
))->mtx_lock, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c")
, (1132));
1133 return (E2BIG7);
1134 }
1135 PROC_UNLOCK(td->td_proc)__mtx_unlock_flags(&((((&(td->td_proc)->p_mtx))
))->mtx_lock, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c")
, (1135));
1136 }
1137#endif
1138
1139 sops = malloc(nsops * sizeof(*sops), M_TEMP, M_WAITOK0x0002);
1140 }
1141 if ((error = copyin(uap->sops, sops, nsops * sizeof(sops[0]))) != 0) {
1142 DPRINTF(("error = %d from copyin(%p, %p, %d)\n", error,
1143 uap->sops, sops, nsops * sizeof(sops[0])));
1144 if (sops != small_sops)
1145 free(sops, M_SEM);
1146 return (error);
1147 }
1148
1149 semakptr = &sema[semid];
1150 sema_mtxp = &sema_mtx[semid];
1151 mtx_lock(sema_mtxp)__mtx_lock_flags(&((((sema_mtxp))))->mtx_lock, ((0)), (
"/root/freebsd/sys/kern/sysv_sem.c"), (1151));
1152 if ((semakptr->u.sem_perm.mode & SEM_ALLOC01000) == 0) {
1153 error = EINVAL22;
1154 goto done2;
1155 }
1156 seq = semakptr->u.sem_perm.seq;
1157 if (seq != IPCID_TO_SEQ(uap->semid)(((uap->semid) >> 16) & 0xffff)) {
1158 error = EINVAL22;
1159 goto done2;
1160 }
1161 if ((error = sem_prison_cansee(rpr, semakptr)) != 0)
1162 goto done2;
1163 /*
1164 * Initial pass through sops to see what permissions are needed.
1165 * Also perform any checks that don't need repeating on each
1166 * attempt to satisfy the request vector.
1167 */
1168 j = 0; /* permission needed */
1169 do_undos = 0;
1170 for (i = 0; i < nsops; i++) {
1171 sopptr = &sops[i];
1172 if (sopptr->sem_num >= semakptr->u.sem_nsems) {
1173 error = EFBIG27;
1174 goto done2;
1175 }
1176 if (sopptr->sem_flg & SEM_UNDO010000 && sopptr->sem_op != 0)
1177 do_undos = 1;
1178 j |= (sopptr->sem_op == 0) ? SEM_R000400 : SEM_A000200;
1179 }
1180
1181 if ((error = ipcperm(td, &semakptr->u.sem_perm, j))) {
1182 DPRINTF(("error = %d from ipaccess\n", error));
1183 goto done2;
1184 }
1185#ifdef MAC1
1186 error = mac_sysvsem_check_semop(td->td_ucred, semakptr, j);
1187 if (error != 0)
1188 goto done2;
1189#endif
1190
1191 /*
1192 * Loop trying to satisfy the vector of requests.
1193 * If we reach a point where we must wait, any requests already
1194 * performed are rolled back and we go to sleep until some other
1195 * process wakes us up. At this point, we start all over again.
1196 *
1197 * This ensures that from the perspective of other tasks, a set
1198 * of requests is atomic (never partially satisfied).
1199 */
1200 for (;;) {
1201 do_wakeup = 0;
1202 error = 0; /* error return if necessary */
1203
1204 for (i = 0; i < nsops; i++) {
1205 sopptr = &sops[i];
1206 semptr = &semakptr->u.__sem_base[sopptr->sem_num];
1207
1208 DPRINTF((
1209 "semop: semakptr=%p, __sem_base=%p, "
1210 "semptr=%p, sem[%d]=%d : op=%d, flag=%s\n",
1211 semakptr, semakptr->u.__sem_base, semptr,
1212 sopptr->sem_num, semptr->semval, sopptr->sem_op,
1213 (sopptr->sem_flg & IPC_NOWAIT) ?
1214 "nowait" : "wait"));
1215
1216 if (sopptr->sem_op < 0) {
1217 if (semptr->semval + sopptr->sem_op < 0) {
1218 DPRINTF(("semop: can't do it now\n"));
1219 break;
1220 } else {
1221 semptr->semval += sopptr->sem_op;
1222 if (semptr->semval == 0 &&
1223 semptr->semzcnt > 0)
1224 do_wakeup = 1;
1225 }
1226 } else if (sopptr->sem_op == 0) {
1227 if (semptr->semval != 0) {
1228 DPRINTF(("semop: not zero now\n"));
1229 break;
1230 }
1231 } else if (semptr->semval + sopptr->sem_op >
1232 seminfo.semvmx) {
1233 error = ERANGE34;
1234 break;
1235 } else {
1236 if (semptr->semncnt > 0)
1237 do_wakeup = 1;
1238 semptr->semval += sopptr->sem_op;
1239 }
1240 }
1241
1242 /*
1243 * Did we get through the entire vector?
1244 */
1245 if (i >= nsops)
1246 goto done;
1247
1248 /*
1249 * No ... rollback anything that we've already done
1250 */
1251 DPRINTF(("semop: rollback 0 through %d\n", i-1));
1252 for (j = 0; j < i; j++)
1253 semakptr->u.__sem_base[sops[j].sem_num].semval -=
1254 sops[j].sem_op;
1255
1256 /* If we detected an error, return it */
1257 if (error != 0)
1258 goto done2;
1259
1260 /*
1261 * If the request that we couldn't satisfy has the
1262 * NOWAIT flag set then return with EAGAIN.
1263 */
1264 if (sopptr->sem_flg & IPC_NOWAIT004000) {
1265 error = EAGAIN35;
1266 goto done2;
1267 }
1268
1269 if (sopptr->sem_op == 0)
1270 semptr->semzcnt++;
1271 else
1272 semptr->semncnt++;
1273
1274 DPRINTF(("semop: good night!\n"));
1275 error = msleep(semakptr, sema_mtxp, (PZERO - 4) | PCATCH,_sleep((semakptr), &(sema_mtxp)->lock_object, ((((80) +
20) - 4) | 0x100), ("semwait"), tick_sbt * (0), 0, 0x0100)
1276 "semwait", 0)_sleep((semakptr), &(sema_mtxp)->lock_object, ((((80) +
20) - 4) | 0x100), ("semwait"), tick_sbt * (0), 0, 0x0100);
1277 DPRINTF(("semop: good morning (error=%d)!\n", error));
1278 /* return code is checked below, after sem[nz]cnt-- */
1279
1280 /*
1281 * Make sure that the semaphore still exists
1282 */
1283 seq = semakptr->u.sem_perm.seq;
1284 if ((semakptr->u.sem_perm.mode & SEM_ALLOC01000) == 0 ||
1285 seq != IPCID_TO_SEQ(uap->semid)(((uap->semid) >> 16) & 0xffff)) {
1286 error = EIDRM82;
1287 goto done2;
1288 }
1289
1290 /*
1291 * Renew the semaphore's pointer after wakeup since
1292 * during msleep __sem_base may have been modified and semptr
1293 * is not valid any more
1294 */
1295 semptr = &semakptr->u.__sem_base[sopptr->sem_num];
1296
1297 /*
1298 * The semaphore is still alive. Readjust the count of
1299 * waiting processes.
1300 */
1301 if (sopptr->sem_op == 0)
1302 semptr->semzcnt--;
1303 else
1304 semptr->semncnt--;
1305
1306 /*
1307 * Is it really morning, or was our sleep interrupted?
1308 * (Delayed check of msleep() return code because we
1309 * need to decrement sem[nz]cnt either way.)
1310 */
1311 if (error != 0) {
1312 error = EINTR4;
1313 goto done2;
1314 }
1315 DPRINTF(("semop: good morning!\n"));
1316 }
1317
1318done:
1319 /*
1320 * Process any SEM_UNDO requests.
1321 */
1322 if (do_undos) {
1323 SEMUNDO_LOCK()__mtx_lock_flags(&((((&sem_undo_mtx))))->mtx_lock,
((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1323));;
1324 suptr = NULL((void *)0);
1325 for (i = 0; i < nsops; i++) {
1326 /*
1327 * We only need to deal with SEM_UNDO's for non-zero
1328 * op's.
1329 */
1330 int adjval;
1331
1332 if ((sops[i].sem_flg & SEM_UNDO010000) == 0)
1333 continue;
1334 adjval = sops[i].sem_op;
1335 if (adjval == 0)
1336 continue;
1337 error = semundo_adjust(td, &suptr, semid, seq,
1338 sops[i].sem_num, -adjval);
1339 if (error == 0)
1340 continue;
1341
1342 /*
1343 * Oh-Oh! We ran out of either sem_undo's or undo's.
1344 * Rollback the adjustments to this point and then
1345 * rollback the semaphore ups and down so we can return
1346 * with an error with all structures restored. We
1347 * rollback the undo's in the exact reverse order that
1348 * we applied them. This guarantees that we won't run
1349 * out of space as we roll things back out.
1350 */
1351 for (j = 0; j < i; j++) {
1352 k = i - j - 1;
1353 if ((sops[k].sem_flg & SEM_UNDO010000) == 0)
1354 continue;
1355 adjval = sops[k].sem_op;
1356 if (adjval == 0)
1357 continue;
1358 if (semundo_adjust(td, &suptr, semid, seq,
1359 sops[k].sem_num, adjval) != 0)
1360 panic("semop - can't undo undos");
1361 }
1362
1363 for (j = 0; j < nsops; j++)
1364 semakptr->u.__sem_base[sops[j].sem_num].semval -=
1365 sops[j].sem_op;
1366
1367 DPRINTF(("error = %d from semundo_adjust\n", error));
1368 SEMUNDO_UNLOCK()__mtx_unlock_flags(&((((&sem_undo_mtx))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1368));;
1369 goto done2;
1370 } /* loop through the sops */
1371 SEMUNDO_UNLOCK()__mtx_unlock_flags(&((((&sem_undo_mtx))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1371));;
1372 } /* if (do_undos) */
1373
1374 /* We're definitely done - set the sempid's and time */
1375 for (i = 0; i < nsops; i++) {
1376 sopptr = &sops[i];
1377 semptr = &semakptr->u.__sem_base[sopptr->sem_num];
1378 semptr->sempid = td->td_proc->p_pid;
1379 }
1380 semakptr->u.sem_otime = time_second;
1381
1382 /*
1383 * Do a wakeup if any semaphore was up'd whilst something was
1384 * sleeping on it.
1385 */
1386 if (do_wakeup) {
1387 DPRINTF(("semop: doing wakeup\n"));
1388 wakeup(semakptr);
1389 DPRINTF(("semop: back from wakeup\n"));
1390 }
1391 DPRINTF(("semop: done\n"));
1392 td->td_retvaltd_uretoff.tdu_retval[0] = 0;
1393done2:
1394 mtx_unlock(sema_mtxp)__mtx_unlock_flags(&((((sema_mtxp))))->mtx_lock, ((0))
, ("/root/freebsd/sys/kern/sysv_sem.c"), (1394));
1395 if (sops != small_sops)
1396 free(sops, M_SEM);
1397 return (error);
1398}
1399
1400/*
1401 * Go through the undo structures for this process and apply the adjustments to
1402 * semaphores.
1403 */
1404static void
1405semexit_myhook(void *arg, struct proc *p)
1406{
1407 struct sem_undo *suptr;
1408 struct semid_kernel *semakptr;
1409 struct mtx *sema_mtxp;
1410 int semid, semnum, adjval, ix;
1411 unsigned short seq;
1412
1413 /*
1414 * Go through the chain of undo vectors looking for one
1415 * associated with this process.
1416 */
1417 if (LIST_EMPTY(&semu_list)((&semu_list)->lh_first == ((void *)0)))
1418 return;
1419 SEMUNDO_LOCK()__mtx_lock_flags(&((((&sem_undo_mtx))))->mtx_lock,
((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1419));;
1420 LIST_FOREACH(suptr, &semu_list, un_next)for ((suptr) = (((&semu_list))->lh_first); (suptr); (suptr
) = (((suptr))->un_next.le_next)) {
1421 if (suptr->un_proc == p)
1422 break;
1423 }
1424 if (suptr == NULL((void *)0)) {
1425 SEMUNDO_UNLOCK()__mtx_unlock_flags(&((((&sem_undo_mtx))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1425));;
1426 return;
1427 }
1428 LIST_REMOVE(suptr, un_next)do { ; ; do { if ((((suptr))->un_next.le_next) != ((void *
)0) && (((suptr))->un_next.le_next)->un_next.le_prev
!= &((suptr)->un_next.le_next)) panic("Bad link elm %p next->prev != elm"
, (suptr)); } while (0); do { if (*(suptr)->un_next.le_prev
!= (suptr)) panic("Bad link elm %p prev->next != elm", (suptr
)); } while (0); if ((((suptr))->un_next.le_next) != ((void
*)0)) (((suptr))->un_next.le_next)->un_next.le_prev = (
suptr)->un_next.le_prev; *(suptr)->un_next.le_prev = ((
(suptr))->un_next.le_next); ; ; } while (0);
1429
1430 DPRINTF(("proc @%p has undo structure with %d entries\n", p,
1431 suptr->un_cnt));
1432
1433 /*
1434 * If there are any active undo elements then process them.
1435 */
1436 if (suptr->un_cnt > 0) {
1437 SEMUNDO_UNLOCK()__mtx_unlock_flags(&((((&sem_undo_mtx))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1437));;
1438 for (ix = 0; ix < suptr->un_cnt; ix++) {
1439 semid = suptr->un_ent[ix].un_id;
1440 semnum = suptr->un_ent[ix].un_num;
1441 adjval = suptr->un_ent[ix].un_adjval;
1442 seq = suptr->un_ent[ix].un_seq;
1443 semakptr = &sema[semid];
1444 sema_mtxp = &sema_mtx[semid];
1445
1446 mtx_lock(sema_mtxp)__mtx_lock_flags(&((((sema_mtxp))))->mtx_lock, ((0)), (
"/root/freebsd/sys/kern/sysv_sem.c"), (1446));
1447 if ((semakptr->u.sem_perm.mode & SEM_ALLOC01000) == 0 ||
1448 (semakptr->u.sem_perm.seq != seq)) {
1449 mtx_unlock(sema_mtxp)__mtx_unlock_flags(&((((sema_mtxp))))->mtx_lock, ((0))
, ("/root/freebsd/sys/kern/sysv_sem.c"), (1449));
1450 continue;
1451 }
1452 if (semnum >= semakptr->u.sem_nsems)
1453 panic("semexit - semnum out of range");
1454
1455 DPRINTF((
1456 "semexit: %p id=%d num=%d(adj=%d) ; sem=%d\n",
1457 suptr->un_proc, suptr->un_ent[ix].un_id,
1458 suptr->un_ent[ix].un_num,
1459 suptr->un_ent[ix].un_adjval,
1460 semakptr->u.__sem_base[semnum].semval));
1461
1462 if (adjval < 0 && semakptr->u.__sem_base[semnum].semval <
1463 -adjval)
1464 semakptr->u.__sem_base[semnum].semval = 0;
1465 else
1466 semakptr->u.__sem_base[semnum].semval += adjval;
1467
1468 wakeup(semakptr);
1469 DPRINTF(("semexit: back from wakeup\n"));
1470 mtx_unlock(sema_mtxp)__mtx_unlock_flags(&((((sema_mtxp))))->mtx_lock, ((0))
, ("/root/freebsd/sys/kern/sysv_sem.c"), (1470));
1471 }
1472 SEMUNDO_LOCK()__mtx_lock_flags(&((((&sem_undo_mtx))))->mtx_lock,
((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1472));;
1473 }
1474
1475 /*
1476 * Deallocate the undo vector.
1477 */
1478 DPRINTF(("removing vector\n"));
1479 suptr->un_proc = NULL((void *)0);
1480 suptr->un_cnt = 0;
1481 LIST_INSERT_HEAD(&semu_free_list, suptr, un_next)do { do { if (((((&semu_free_list)))->lh_first) != ((void
*)0) && ((((&semu_free_list)))->lh_first)->
un_next.le_prev != &((((&semu_free_list)))->lh_first
)) panic("Bad list head %p first->prev != head", ((&semu_free_list
))); } while (0); if (((((suptr))->un_next.le_next) = (((&
semu_free_list))->lh_first)) != ((void *)0)) (((&semu_free_list
))->lh_first)->un_next.le_prev = &(((suptr))->un_next
.le_next); (((&semu_free_list))->lh_first) = (suptr); (
suptr)->un_next.le_prev = &(((&semu_free_list))->
lh_first); } while (0);
1482 SEMUNDO_UNLOCK()__mtx_unlock_flags(&((((&sem_undo_mtx))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1482));;
1483}
1484
1485static int
1486sysctl_sema(SYSCTL_HANDLER_ARGSstruct sysctl_oid *oidp, void *arg1, intmax_t arg2, struct sysctl_req
*req)
1487{
1488 struct prison *pr, *rpr;
1489 struct semid_kernel tsemak;
1490#ifdef COMPAT_FREEBSD321
1491 struct semid_kernel32 tsemak32;
1492#endif
1493 void *outaddr;
1494 size_t outsize;
1495 int error, i;
1496
1497 pr = req->td->td_ucred->cr_prison;
1498 rpr = sem_find_prison(req->td->td_ucred);
1499 error = 0;
1500 for (i = 0; i < seminfo.semmni; i++) {
1501 mtx_lock(&sema_mtx[i])__mtx_lock_flags(&((((&sema_mtx[i]))))->mtx_lock, (
(0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1501));
1502 if ((sema[i].u.sem_perm.mode & SEM_ALLOC01000) == 0 ||
1503 rpr == NULL((void *)0) || sem_prison_cansee(rpr, &sema[i]) != 0)
1504 bzero(&tsemak, sizeof(tsemak))__builtin_memset((&tsemak), 0, (sizeof(tsemak)));
1505 else {
1506 tsemak = sema[i];
1507 if (tsemak.cred->cr_prison != pr)
1508 tsemak.u.sem_perm.key = IPC_PRIVATE(key_t)0;
1509 }
1510 mtx_unlock(&sema_mtx[i])__mtx_unlock_flags(&((((&sema_mtx[i]))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1510));
1511#ifdef COMPAT_FREEBSD321
1512 if (SV_CURPROC_FLAG(SV_ILP32)((((__curthread())->td_proc))->p_sysent->sv_flags &
(0x000100))) {
1513 bzero(&tsemak32, sizeof(tsemak32))__builtin_memset((&tsemak32), 0, (sizeof(tsemak32)));
1514 freebsd32_ipcperm_out(&tsemak.u.sem_perm,
1515 &tsemak32.u.sem_perm);
1516 /* Don't copy u.__sem_base */
1517 CP(tsemak, tsemak32, u.sem_nsems)do { (tsemak32).u.sem_nsems = (tsemak).u.sem_nsems; } while (
0);
1518 CP(tsemak, tsemak32, u.sem_otime)do { (tsemak32).u.sem_otime = (tsemak).u.sem_otime; } while (
0);
1519 CP(tsemak, tsemak32, u.sem_ctime)do { (tsemak32).u.sem_ctime = (tsemak).u.sem_ctime; } while (
0);
1520 /* Don't copy label or cred */
1521 outaddr = &tsemak32;
1522 outsize = sizeof(tsemak32);
1523 } else
1524#endif
1525 {
1526 tsemak.u.__sem_base = NULL((void *)0);
1527 tsemak.label = NULL((void *)0);
1528 tsemak.cred = NULL((void *)0);
1529 outaddr = &tsemak;
1530 outsize = sizeof(tsemak);
1531 }
1532 error = SYSCTL_OUT(req, outaddr, outsize)(req->oldfunc)(req, outaddr, outsize);
1533 if (error != 0)
1534 break;
1535 }
1536 return (error);
1537}
1538
1539static int
1540sem_prison_check(void *obj, void *data)
1541{
1542 struct prison *pr = obj;
1543 struct prison *prpr;
1544 struct vfsoptlist *opts = data;
1545 int error, jsys;
1546
1547 /*
1548 * sysvsem is a jailsys integer.
1549 * It must be "disable" if the parent jail is disabled.
1550 */
1551 error = vfs_copyopt(opts, "sysvsem", &jsys, sizeof(jsys));
1552 if (error != ENOENT2) {
1553 if (error != 0)
1554 return (error);
1555 switch (jsys) {
1556 case JAIL_SYS_DISABLE0:
1557 break;
1558 case JAIL_SYS_NEW1:
1559 case JAIL_SYS_INHERIT2:
1560 prison_lock(pr->pr_parent);
1561 prpr = osd_jail_get(pr->pr_parent, sem_prison_slot)osd_get(1, &(pr->pr_parent)->pr_osd, (sem_prison_slot
));
1562 prison_unlock(pr->pr_parent);
1563 if (prpr == NULL((void *)0))
1564 return (EPERM1);
1565 break;
1566 default:
1567 return (EINVAL22);
1568 }
1569 }
1570
1571 return (0);
1572}
1573
1574static int
1575sem_prison_set(void *obj, void *data)
1576{
1577 struct prison *pr = obj;
1578 struct prison *tpr, *orpr, *nrpr, *trpr;
1579 struct vfsoptlist *opts = data;
1580 void *rsv;
1581 int jsys, descend;
1582
1583 /*
1584 * sysvsem controls which jail is the root of the associated sems (this
1585 * jail or same as the parent), or if the feature is available at all.
1586 */
1587 if (vfs_copyopt(opts, "sysvsem", &jsys, sizeof(jsys)) == ENOENT2)
1588 jsys = vfs_flagopt(opts, "allow.sysvipc", NULL((void *)0), 0)
1589 ? JAIL_SYS_INHERIT2
1590 : vfs_flagopt(opts, "allow.nosysvipc", NULL((void *)0), 0)
1591 ? JAIL_SYS_DISABLE0
1592 : -1;
1593 if (jsys == JAIL_SYS_DISABLE0) {
1594 prison_lock(pr);
1595 orpr = osd_jail_get(pr, sem_prison_slot)osd_get(1, &(pr)->pr_osd, (sem_prison_slot));
1596 if (orpr != NULL((void *)0))
1597 osd_jail_del(pr, sem_prison_slot)osd_del(1, &(pr)->pr_osd, (sem_prison_slot));
1598 prison_unlock(pr);
1599 if (orpr != NULL((void *)0)) {
1600 if (orpr == pr)
1601 sem_prison_cleanup(pr);
1602 /* Disable all child jails as well. */
1603 FOREACH_PRISON_DESCENDANT(pr, tpr, descend)for ((tpr) = (pr), (descend) = 1; ((tpr) = (((descend) &&
!((&(tpr)->pr_children)->lh_first == ((void *)0)))
? ((&(tpr)->pr_children)->lh_first) : ((tpr) == (pr
) ? ((void *)0) : (((descend) = ((tpr)->pr_sibling.le_next
) != ((void *)0)) ? ((tpr)->pr_sibling.le_next) : (tpr)->
pr_parent))));) if (!(descend)) ; else {
1604 prison_lock(tpr);
1605 trpr = osd_jail_get(tpr, sem_prison_slot)osd_get(1, &(tpr)->pr_osd, (sem_prison_slot));
1606 if (trpr != NULL((void *)0)) {
1607 osd_jail_del(tpr, sem_prison_slot)osd_del(1, &(tpr)->pr_osd, (sem_prison_slot));
1608 prison_unlock(tpr);
1609 if (trpr == tpr)
1610 sem_prison_cleanup(tpr);
1611 } else {
1612 prison_unlock(tpr);
1613 descend = 0;
1614 }
1615 }
1616 }
1617 } else if (jsys != -1) {
1618 if (jsys == JAIL_SYS_NEW1)
1619 nrpr = pr;
1620 else {
1621 prison_lock(pr->pr_parent);
1622 nrpr = osd_jail_get(pr->pr_parent, sem_prison_slot)osd_get(1, &(pr->pr_parent)->pr_osd, (sem_prison_slot
));
1623 prison_unlock(pr->pr_parent);
1624 }
1625 rsv = osd_reserve(sem_prison_slot);
1626 prison_lock(pr);
1627 orpr = osd_jail_get(pr, sem_prison_slot)osd_get(1, &(pr)->pr_osd, (sem_prison_slot));
1628 if (orpr != nrpr)
1629 (void)osd_jail_set_reserved(pr, sem_prison_slot, rsv,osd_set_reserved(1, &(pr)->pr_osd, (sem_prison_slot), (
rsv), (nrpr))
1630 nrpr)osd_set_reserved(1, &(pr)->pr_osd, (sem_prison_slot), (
rsv), (nrpr));
1631 else
1632 osd_free_reserved(rsv);
1633 prison_unlock(pr);
1634 if (orpr != nrpr) {
1635 if (orpr == pr)
1636 sem_prison_cleanup(pr);
1637 if (orpr != NULL((void *)0)) {
1638 /* Change child jails matching the old root, */
1639 FOREACH_PRISON_DESCENDANT(pr, tpr, descend)for ((tpr) = (pr), (descend) = 1; ((tpr) = (((descend) &&
!((&(tpr)->pr_children)->lh_first == ((void *)0)))
? ((&(tpr)->pr_children)->lh_first) : ((tpr) == (pr
) ? ((void *)0) : (((descend) = ((tpr)->pr_sibling.le_next
) != ((void *)0)) ? ((tpr)->pr_sibling.le_next) : (tpr)->
pr_parent))));) if (!(descend)) ; else {
1640 prison_lock(tpr);
1641 trpr = osd_jail_get(tpr,osd_get(1, &(tpr)->pr_osd, (sem_prison_slot))
1642 sem_prison_slot)osd_get(1, &(tpr)->pr_osd, (sem_prison_slot));
1643 if (trpr == orpr) {
1644 (void)osd_jail_set(tpr,osd_set(1, &(tpr)->pr_osd, (sem_prison_slot), (nrpr))
1645 sem_prison_slot, nrpr)osd_set(1, &(tpr)->pr_osd, (sem_prison_slot), (nrpr));
1646 prison_unlock(tpr);
1647 if (trpr == tpr)
1648 sem_prison_cleanup(tpr);
1649 } else {
1650 prison_unlock(tpr);
1651 descend = 0;
1652 }
1653 }
1654 }
1655 }
1656 }
1657
1658 return (0);
1659}
1660
1661static int
1662sem_prison_get(void *obj, void *data)
1663{
1664 struct prison *pr = obj;
1665 struct prison *rpr;
1666 struct vfsoptlist *opts = data;
1667 int error, jsys;
1668
1669 /* Set sysvsem based on the jail's root prison. */
1670 prison_lock(pr);
1671 rpr = osd_jail_get(pr, sem_prison_slot)osd_get(1, &(pr)->pr_osd, (sem_prison_slot));
1672 prison_unlock(pr);
1673 jsys = rpr == NULL((void *)0) ? JAIL_SYS_DISABLE0
1674 : rpr == pr ? JAIL_SYS_NEW1 : JAIL_SYS_INHERIT2;
1675 error = vfs_setopt(opts, "sysvsem", &jsys, sizeof(jsys));
1676 if (error == ENOENT2)
1677 error = 0;
1678 return (error);
1679}
1680
1681static int
1682sem_prison_remove(void *obj, void *data __unused__attribute__((__unused__)))
1683{
1684 struct prison *pr = obj;
1685 struct prison *rpr;
1686
1687 prison_lock(pr);
1688 rpr = osd_jail_get(pr, sem_prison_slot)osd_get(1, &(pr)->pr_osd, (sem_prison_slot));
1689 prison_unlock(pr);
1690 if (rpr == pr)
1691 sem_prison_cleanup(pr);
1692 return (0);
1693}
1694
1695static void
1696sem_prison_cleanup(struct prison *pr)
1697{
1698 int i;
1699
1700 /* Remove any sems that belong to this jail. */
1701 mtx_lock(&sem_mtx)__mtx_lock_flags(&((((&sem_mtx))))->mtx_lock, ((0)
), ("/root/freebsd/sys/kern/sysv_sem.c"), (1701));
1702 for (i = 0; i < seminfo.semmni; i++) {
1703 if ((sema[i].u.sem_perm.mode & SEM_ALLOC01000) &&
1704 sema[i].cred != NULL((void *)0) && sema[i].cred->cr_prison == pr) {
1705 mtx_lock(&sema_mtx[i])__mtx_lock_flags(&((((&sema_mtx[i]))))->mtx_lock, (
(0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1705));
1706 sem_remove(i, NULL((void *)0));
1707 mtx_unlock(&sema_mtx[i])__mtx_unlock_flags(&((((&sema_mtx[i]))))->mtx_lock
, ((0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1707));
1708 }
1709 }
1710 mtx_unlock(&sem_mtx)__mtx_unlock_flags(&((((&sem_mtx))))->mtx_lock, ((
0)), ("/root/freebsd/sys/kern/sysv_sem.c"), (1710));
1711}
1712
1713SYSCTL_JAIL_PARAM_SYS_NODE(sysvsem, CTLFLAG_RW, "SYSV semaphores")struct sysctl_oid sysctl___security_jail_param_sysvsem = { .oid_parent
= ((&(&sysctl___security_jail_param)->oid_children
)), .oid_children = { ((void *)0) }, .oid_number = ((-1)), .oid_kind
= (1|(0)), .oid_arg1 = (((void *)0)), .oid_arg2 = (0), .oid_name
= ("sysvsem"), .oid_handler = (0), .oid_fmt = ("N"), .oid_descr
= "SYSV semaphores", .oid_label = (((void *)0)), }; __asm__(
".globl " "__start_set_sysctl_set"); __asm__(".globl " "__stop_set_sysctl_set"
); static void const * const __set_sysctl_set_sym_sysctl___security_jail_param_sysvsem
__attribute__((__section__("set_" "sysctl_set"))) __attribute__
((__used__)) = &(sysctl___security_jail_param_sysvsem); _Static_assert
(((0) & 0xf) == 0 || ((0) & 0xf) == 1, "compile-time assertion failed"
); static struct sysctl_oid sysctl___security_jail_param_sysvsem_
= { .oid_parent = ((&(&sysctl___security_jail_param_sysvsem
)->oid_children)), .oid_children = { ((void *)0) }, .oid_number
= ((-1)), .oid_kind = (((2 | ((0x80000000|0x40000000))) | 0x00040000
)), .oid_arg1 = (((void *)0)), .oid_arg2 = (0), .oid_name = (
""), .oid_handler = (sysctl_jail_param), .oid_fmt = ("E,jailsys"
), .oid_descr = "SYSV semaphores", .oid_label = (((void *)0))
, }; __asm__(".globl " "__start_set_sysctl_set"); __asm__(".globl "
"__stop_set_sysctl_set"); static void const * const __set_sysctl_set_sym_sysctl___security_jail_param_sysvsem_
__attribute__((__section__("set_" "sysctl_set"))) __attribute__
((__used__)) = &(sysctl___security_jail_param_sysvsem_); _Static_assert
((((2 | ((0x80000000|0x40000000))) | 0x00040000) & 0xf) !=
0, "compile-time assertion failed");
1714
1715#if defined(COMPAT_FREEBSD41) || defined(COMPAT_FREEBSD51) || \
1716 defined(COMPAT_FREEBSD61) || defined(COMPAT_FREEBSD71)
1717
1718/* XXX casting to (sy_call_t *) is bogus, as usual. */
1719static sy_call_t *semcalls[] = {
1720 (sy_call_t *)freebsd7___semctl, (sy_call_t *)sys_semget,
1721 (sy_call_t *)sys_semop
1722};
1723
1724/*
1725 * Entry point for all SEM calls.
1726 */
1727int
1728sys_semsys(td, uap)
1729 struct thread *td;
1730 /* XXX actually varargs. */
1731 struct semsys_args /* {
1732 int which;
1733 int a2;
1734 int a3;
1735 int a4;
1736 int a5;
1737 } */ *uap;
1738{
1739 int error;
1740
1741 AUDIT_ARG_SVIPC_WHICH(uap->which)do { if ((__builtin_expect((((__curthread()))->td_pflags &
0x01000000), 0))) audit_arg_svipc_which((uap->which)); } while
(0);
1742 if (uap->which < 0 || uap->which >= nitems(semcalls)(sizeof((semcalls)) / sizeof((semcalls)[0])))
1743 return (EINVAL22);
1744 error = (*semcalls[uap->which])(td, &uap->a2);
1745 return (error);
1746}
1747
1748#ifndef CP
1749#define CP(src, dst, fld)do { (dst).fld = (src).fld; } while (0) do { (dst).fld = (src).fld; } while (0)
1750#endif
1751
1752#ifndef _SYS_SYSPROTO_H_
1753struct freebsd7___semctl_args {
1754 int semid;
1755 int semnum;
1756 int cmd;
1757 union semun_old *arg;
1758};
1759#endif
1760int
1761freebsd7___semctl(struct thread *td, struct freebsd7___semctl_args *uap)
1762{
1763 struct semid_ds_old dsold;
1764 struct semid_ds dsbuf;
1765 union semun_old arg;
1766 union semun semun;
1767 register_t rval;
1768 int error;
1769
1770 switch (uap->cmd) {
1771 case SEM_STAT10:
1772 case IPC_SET1:
1773 case IPC_STAT2:
1774 case GETALL6:
1775 case SETVAL8:
1776 case SETALL9:
1777 error = copyin(uap->arg, &arg, sizeof(arg));
1778 if (error)
1779 return (error);
1780 break;
1781 }
1782
1783 switch (uap->cmd) {
1784 case SEM_STAT10:
1785 case IPC_STAT2:
1786 semun.buf = &dsbuf;
1787 break;
1788 case IPC_SET1:
1789 error = copyin(arg.buf, &dsold, sizeof(dsold));
1790 if (error)
1791 return (error);
1792 ipcperm_old2new(&dsold.sem_perm, &dsbuf.sem_perm);
1793 CP(dsold, dsbuf, __sem_base)do { (dsbuf).__sem_base = (dsold).__sem_base; } while (0);
1794 CP(dsold, dsbuf, sem_nsems)do { (dsbuf).sem_nsems = (dsold).sem_nsems; } while (0);
1795 CP(dsold, dsbuf, sem_otime)do { (dsbuf).sem_otime = (dsold).sem_otime; } while (0);
1796 CP(dsold, dsbuf, sem_ctime)do { (dsbuf).sem_ctime = (dsold).sem_ctime; } while (0);
1797 semun.buf = &dsbuf;
1798 break;
1799 case GETALL6:
1800 case SETALL9:
1801 semun.array = arg.array;
1802 break;
1803 case SETVAL8:
1804 semun.val = arg.val;
1805 break;
1806 }
1807
1808 error = kern_semctl(td, uap->semid, uap->semnum, uap->cmd, &semun,
1809 &rval);
1810 if (error)
1811 return (error);
1812
1813 switch (uap->cmd) {
1814 case SEM_STAT10:
1815 case IPC_STAT2:
1816 bzero(&dsold, sizeof(dsold))__builtin_memset((&dsold), 0, (sizeof(dsold)));
1817 ipcperm_new2old(&dsbuf.sem_perm, &dsold.sem_perm);
1818 CP(dsbuf, dsold, __sem_base)do { (dsold).__sem_base = (dsbuf).__sem_base; } while (0);
1819 CP(dsbuf, dsold, sem_nsems)do { (dsold).sem_nsems = (dsbuf).sem_nsems; } while (0);
1820 CP(dsbuf, dsold, sem_otime)do { (dsold).sem_otime = (dsbuf).sem_otime; } while (0);
1821 CP(dsbuf, dsold, sem_ctime)do { (dsold).sem_ctime = (dsbuf).sem_ctime; } while (0);
1822 error = copyout(&dsold, arg.buf, sizeof(dsold));
1823 break;
1824 }
1825
1826 if (error == 0)
1827 td->td_retvaltd_uretoff.tdu_retval[0] = rval;
1828 return (error);
1829}
1830
1831#endif /* COMPAT_FREEBSD{4,5,6,7} */
1832
1833#ifdef COMPAT_FREEBSD321
1834
1835int
1836freebsd32_semsys(struct thread *td, struct freebsd32_semsys_args *uap)
1837{
1838
1839#if defined(COMPAT_FREEBSD41) || defined(COMPAT_FREEBSD51) || \
1840 defined(COMPAT_FREEBSD61) || defined(COMPAT_FREEBSD71)
1841 AUDIT_ARG_SVIPC_WHICH(uap->which)do { if ((__builtin_expect((((__curthread()))->td_pflags &
0x01000000), 0))) audit_arg_svipc_which((uap->which)); } while
(0);
1842 switch (uap->which) {
1843 case 0:
1844 return (freebsd7_freebsd32_semctl(td,
1845 (struct freebsd7_freebsd32_semctl_args *)&uap->a2));
1846 default:
1847 return (sys_semsys(td, (struct semsys_args *)uap));
1848 }
1849#else
1850 return (nosys(td, NULL((void *)0)));
1851#endif
1852}
1853
1854#if defined(COMPAT_FREEBSD41) || defined(COMPAT_FREEBSD51) || \
1855 defined(COMPAT_FREEBSD61) || defined(COMPAT_FREEBSD71)
1856int
1857freebsd7_freebsd32_semctl(struct thread *td,
1858 struct freebsd7_freebsd32_semctl_args *uap)
1859{
1860 struct semid_ds32_old dsbuf32;
1861 struct semid_ds dsbuf;
1862 union semun semun;
1863 union semun32 arg;
1864 register_t rval;
1865 int error;
1866
1867 switch (uap->cmd) {
1868 case SEM_STAT10:
1869 case IPC_SET1:
1870 case IPC_STAT2:
1871 case GETALL6:
1872 case SETVAL8:
1873 case SETALL9:
1874 error = copyin(uap->arg, &arg, sizeof(arg));
1875 if (error)
1876 return (error);
1877 break;
1878 }
1879
1880 switch (uap->cmd) {
1881 case SEM_STAT10:
1882 case IPC_STAT2:
1883 semun.buf = &dsbuf;
1884 break;
1885 case IPC_SET1:
1886 error = copyin(PTRIN(arg.buf)(void *)(uintptr_t) (arg.buf), &dsbuf32, sizeof(dsbuf32));
1887 if (error)
1888 return (error);
1889 freebsd32_ipcperm_old_in(&dsbuf32.sem_perm, &dsbuf.sem_perm);
1890 PTRIN_CP(dsbuf32, dsbuf, __sem_base)do { (dsbuf).__sem_base = (void *)(uintptr_t) ((dsbuf32).__sem_base
); } while (0);
1891 CP(dsbuf32, dsbuf, sem_nsems)do { (dsbuf).sem_nsems = (dsbuf32).sem_nsems; } while (0);
1892 CP(dsbuf32, dsbuf, sem_otime)do { (dsbuf).sem_otime = (dsbuf32).sem_otime; } while (0);
1893 CP(dsbuf32, dsbuf, sem_ctime)do { (dsbuf).sem_ctime = (dsbuf32).sem_ctime; } while (0);
1894 semun.buf = &dsbuf;
1895 break;
1896 case GETALL6:
1897 case SETALL9:
1898 semun.array = PTRIN(arg.array)(void *)(uintptr_t) (arg.array);
1899 break;
1900 case SETVAL8:
1901 semun.val = arg.val;
1902 break;
1903 }
1904
1905 error = kern_semctl(td, uap->semid, uap->semnum, uap->cmd, &semun,
1906 &rval);
1907 if (error)
1908 return (error);
1909
1910 switch (uap->cmd) {
1911 case SEM_STAT10:
1912 case IPC_STAT2:
1913 bzero(&dsbuf32, sizeof(dsbuf32))__builtin_memset((&dsbuf32), 0, (sizeof(dsbuf32)));
1914 freebsd32_ipcperm_old_out(&dsbuf.sem_perm, &dsbuf32.sem_perm);
1915 PTROUT_CP(dsbuf, dsbuf32, __sem_base)do { (dsbuf32).__sem_base = (u_int32_t)(uintptr_t) ((dsbuf).__sem_base
); } while (0);
1916 CP(dsbuf, dsbuf32, sem_nsems)do { (dsbuf32).sem_nsems = (dsbuf).sem_nsems; } while (0);
1917 CP(dsbuf, dsbuf32, sem_otime)do { (dsbuf32).sem_otime = (dsbuf).sem_otime; } while (0);
1918 CP(dsbuf, dsbuf32, sem_ctime)do { (dsbuf32).sem_ctime = (dsbuf).sem_ctime; } while (0);
1919 error = copyout(&dsbuf32, PTRIN(arg.buf)(void *)(uintptr_t) (arg.buf), sizeof(dsbuf32));
1920 break;
1921 }
1922
1923 if (error == 0)
1924 td->td_retvaltd_uretoff.tdu_retval[0] = rval;
1925 return (error);
1926}
1927#endif
1928
1929int
1930freebsd32_semctl(struct thread *td, struct freebsd32_semctl_args *uap)
1931{
1932 struct semid_ds32 dsbuf32;
1933 struct semid_ds dsbuf;
1934 union semun semun;
1935 union semun32 arg;
1936 register_t rval;
1937 int error;
1938
1939 switch (uap->cmd) {
1940 case SEM_STAT10:
1941 case IPC_SET1:
1942 case IPC_STAT2:
1943 case GETALL6:
1944 case SETVAL8:
1945 case SETALL9:
1946 error = copyin(uap->arg, &arg, sizeof(arg));
1947 if (error)
1948 return (error);
1949 break;
1950 }
1951
1952 switch (uap->cmd) {
1953 case SEM_STAT10:
1954 case IPC_STAT2:
1955 semun.buf = &dsbuf;
1956 break;
1957 case IPC_SET1:
1958 error = copyin(PTRIN(arg.buf)(void *)(uintptr_t) (arg.buf), &dsbuf32, sizeof(dsbuf32));
1959 if (error)
1960 return (error);
1961 freebsd32_ipcperm_in(&dsbuf32.sem_perm, &dsbuf.sem_perm);
1962 PTRIN_CP(dsbuf32, dsbuf, __sem_base)do { (dsbuf).__sem_base = (void *)(uintptr_t) ((dsbuf32).__sem_base
); } while (0);
1963 CP(dsbuf32, dsbuf, sem_nsems)do { (dsbuf).sem_nsems = (dsbuf32).sem_nsems; } while (0);
1964 CP(dsbuf32, dsbuf, sem_otime)do { (dsbuf).sem_otime = (dsbuf32).sem_otime; } while (0);
1965 CP(dsbuf32, dsbuf, sem_ctime)do { (dsbuf).sem_ctime = (dsbuf32).sem_ctime; } while (0);
1966 semun.buf = &dsbuf;
1967 break;
1968 case GETALL6:
1969 case SETALL9:
1970 semun.array = PTRIN(arg.array)(void *)(uintptr_t) (arg.array);
1971 break;
1972 case SETVAL8:
1973 semun.val = arg.val;
1974 break;
1975 }
1976
1977 error = kern_semctl(td, uap->semid, uap->semnum, uap->cmd, &semun,
1978 &rval);
1979 if (error)
1980 return (error);
1981
1982 switch (uap->cmd) {
1983 case SEM_STAT10:
1984 case IPC_STAT2:
1985 bzero(&dsbuf32, sizeof(dsbuf32))__builtin_memset((&dsbuf32), 0, (sizeof(dsbuf32)));
1986 freebsd32_ipcperm_out(&dsbuf.sem_perm, &dsbuf32.sem_perm);
1987 PTROUT_CP(dsbuf, dsbuf32, __sem_base)do { (dsbuf32).__sem_base = (u_int32_t)(uintptr_t) ((dsbuf).__sem_base
); } while (0);
1988 CP(dsbuf, dsbuf32, sem_nsems)do { (dsbuf32).sem_nsems = (dsbuf).sem_nsems; } while (0);
1989 CP(dsbuf, dsbuf32, sem_otime)do { (dsbuf32).sem_otime = (dsbuf).sem_otime; } while (0);
1990 CP(dsbuf, dsbuf32, sem_ctime)do { (dsbuf32).sem_ctime = (dsbuf).sem_ctime; } while (0);
1991 error = copyout(&dsbuf32, PTRIN(arg.buf)(void *)(uintptr_t) (arg.buf), sizeof(dsbuf32));
1992 break;
1993 }
1994
1995 if (error == 0)
1996 td->td_retvaltd_uretoff.tdu_retval[0] = rval;
1997 return (error);
1998}
1999
2000#endif /* COMPAT_FREEBSD32 */