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author | rwatson <rwatson@FreeBSD.org> | 2005-01-22 19:04:17 +0000 |
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committer | rwatson <rwatson@FreeBSD.org> | 2005-01-22 19:04:17 +0000 |
commit | 1215571a8784433c8e5680a8bc5697f81df699c2 (patch) | |
tree | c25e2cff456d58c728f4c56a2b4b9282cab0b6a2 /sys | |
parent | a9307575e8a271668fbfd1b33c2d7cf5e33afd89 (diff) | |
download | FreeBSD-src-1215571a8784433c8e5680a8bc5697f81df699c2.zip FreeBSD-src-1215571a8784433c8e5680a8bc5697f81df699c2.tar.gz |
Invoke label initialization, creation, cleanup, and tear-down MAC
Framework entry points for System V IPC semaphores.
Submitted by: Dandekar Hrishikesh <rishi_dandekar at sbcglobal dot net>
Obtained from: TrustedBSD Project
Sponsored by: DARPA, SPAWAR, McAfee Research
Diffstat (limited to 'sys')
-rw-r--r-- | sys/kern/sysv_sem.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/sys/kern/sysv_sem.c b/sys/kern/sysv_sem.c index d7754c0..0adcaa3 100644 --- a/sys/kern/sysv_sem.c +++ b/sys/kern/sysv_sem.c @@ -5,11 +5,42 @@ * * This software is provided ``AS IS'' without any warranties of any kind. */ +/*- + * Copyright (c) 2003-2005 McAfee, Inc. + * All rights reserved. + * + * This software was developed for the FreeBSD Project in part by McAfee + * Research, the Security Research Division of McAfee, Inc under DARPA/SPAWAR + * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS research + * program. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include "opt_sysvipc.h" +#include "opt_mac.h" #include <sys/param.h> #include <sys/systm.h> @@ -26,6 +57,7 @@ __FBSDID("$FreeBSD$"); #include <sys/sysctl.h> #include <sys/malloc.h> #include <sys/jail.h> +#include <sys/mac.h> static MALLOC_DEFINE(M_SEM, "sem", "SVID compatible semaphores"); @@ -34,6 +66,11 @@ static MALLOC_DEFINE(M_SEM, "sem", "SVID compatible semaphores"); #else #define DPRINTF(a) #endif +#ifdef MAC_DEBUG +#define MPRINTF(a) printf a +#else +#define MPRINTF(a) +#endif static void seminit(void); static int sysvsem_modload(struct module *, int, void *); @@ -200,6 +237,9 @@ seminit(void) sema[i].u.sem_base = 0; sema[i].u.sem_perm.mode = 0; sema[i].u.sem_perm.seq = 0; +#ifdef MAC + mac_init_sysv_sema(&sema[i]); +#endif } for (i = 0; i < seminfo.semmni; i++) mtx_init(&sema_mtx[i], "semid", NULL, MTX_DEF); @@ -222,6 +262,10 @@ semunload(void) return (EBUSY); EVENTHANDLER_DEREGISTER(process_exit, semexit_tag); +#ifdef MAC + for (i = 0; i < seminfo.semmni; i++) + mac_destroy_sysv_sema(&sema[i]); +#endif free(sem, M_SEM); free(sema, M_SEM); free(semu, M_SEM); @@ -536,6 +580,14 @@ __semctl(td, uap) } if ((error = ipcperm(td, &semakptr->u.sem_perm, IPC_R))) goto done2; +#ifdef MAC + error = mac_check_sysv_semctl(cred, semakptr, cmd); + if (error != 0) { + MPRINTF(("mac_check_sysv_semctl returned %d\n", + error)); + goto done2; + } +#endif mtx_unlock(sema_mtxp); error = copyout(&semakptr->u, real_arg.buf, sizeof(struct semid_ds)); @@ -551,6 +603,16 @@ __semctl(td, uap) semakptr = &sema[semid]; sema_mtxp = &sema_mtx[semid]; +#ifdef MAC + mtx_lock(sema_mtxp); + error = mac_check_sysv_semctl(cred, semakptr, cmd); + if (error != 0) { + MPRINTF(("mac_check_sysv_semctl returned %d\n", error)); + mtx_unlock(sema_mtxp); + return (error); + } + mtx_unlock(sema_mtxp); +#endif error = 0; rval = 0; @@ -573,6 +635,9 @@ __semctl(td, uap) sema[i].u.sem_base -= semakptr->u.sem_nsems; } semakptr->u.sem_perm.mode = 0; +#ifdef MAC + mac_cleanup_sysv_sema(semakptr); +#endif SEMUNDO_LOCK(); semundo_clear(semid, -1); SEMUNDO_UNLOCK(); @@ -804,6 +869,14 @@ semget(td, uap) error = EEXIST; goto done2; } +#ifdef MAC + error = mac_check_sysv_semget(cred, &sema[semid]); + if (error != 0) { + MPRINTF(("mac_check_sysv_semget returned %d\n", + error)); + goto done2; + } +#endif goto found; } } @@ -848,6 +921,9 @@ semget(td, uap) semtot += nsems; bzero(sema[semid].u.sem_base, sizeof(sema[semid].u.sem_base[0])*nsems); +#ifdef MAC + mac_create_sysv_sema(cred, &sema[semid]); +#endif DPRINTF(("sembase = 0x%x, next = 0x%x\n", sema[semid].u.sem_base, &sem[semtot])); } else { @@ -954,6 +1030,13 @@ semop(td, uap) DPRINTF(("error = %d from ipaccess\n", error)); goto done2; } +#ifdef MAC + error = mac_check_sysv_semop(td->td_ucred, semakptr, j); + if (error != 0) { + MPRINTF(("mac_check_sysv_semop returned %d\n", error)); + goto done2; + } +#endif /* * Loop trying to satisfy the vector of requests. |