diff options
Diffstat (limited to 'sys/security/mac/mac_posix_sem.c')
| -rw-r--r-- | sys/security/mac/mac_posix_sem.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/sys/security/mac/mac_posix_sem.c b/sys/security/mac/mac_posix_sem.c new file mode 100644 index 0000000..7304bb25 --- /dev/null +++ b/sys/security/mac/mac_posix_sem.c @@ -0,0 +1,181 @@ +/*- + * Copyright (c) 2003-2005 SPARTA, Inc. + * All rights reserved. + * + * This software was developed for the FreeBSD Project in part by Network + * Associates Laboratories, the Security Research Division of Network + * Associates, 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_mac.h" +#include "opt_posix.h" + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/mac.h> +#include <sys/module.h> +#include <sys/systm.h> +#include <sys/sysctl.h> + +#include <posix4/ksem.h> + +#include <sys/mac_policy.h> + +#include <security/mac/mac_internal.h> + +static int mac_enforce_posix_sem = 1; +SYSCTL_INT(_security_mac, OID_AUTO, enforce_posix_sem, CTLFLAG_RW, + &mac_enforce_posix_sem, 0, "Enforce MAC policy on global POSIX semaphores"); +TUNABLE_INT("security.mac.enforce_posix_sem", &mac_enforce_posix_sem); + +#ifdef MAC_DEBUG +static unsigned int nmacposixsems; +SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, posix_sems, CTLFLAG_RD, + &nmacposixsems, 0, "number of posix global semaphores inuse"); +#endif + +static struct label * +mac_posix_sem_label_alloc(void) +{ + struct label *label; + + label = mac_labelzone_alloc(M_WAITOK); + MAC_PERFORM(init_posix_sem_label, label); + MAC_DEBUG_COUNTER_INC(&nmacposixsems); + return (label); +} + +void +mac_init_posix_sem(struct ksem *ksemptr) +{ + + ksemptr->ks_label = mac_posix_sem_label_alloc(); +} + +static void +mac_posix_sem_label_free(struct label *label) +{ + + MAC_PERFORM(destroy_posix_sem_label, label); + MAC_DEBUG_COUNTER_DEC(&nmacposixsems); +} + +void +mac_destroy_posix_sem(struct ksem *ksemptr) +{ + + mac_posix_sem_label_free(ksemptr->ks_label); + ksemptr->ks_label = NULL; +} + +void +mac_create_posix_sem(struct ucred *cred, struct ksem *ksemptr) +{ + + MAC_PERFORM(create_posix_sem, cred, ksemptr, ksemptr->ks_label); +} + +int +mac_check_posix_sem_destroy(struct ucred *cred, struct ksem *ksemptr) +{ + int error; + + if (!mac_enforce_posix_sem) + return (0); + + MAC_CHECK(check_posix_sem_destroy, cred, ksemptr, ksemptr->ks_label); + + return(error); +} + +int +mac_check_posix_sem_open(struct ucred *cred, struct ksem *ksemptr) +{ + int error; + + if (!mac_enforce_posix_sem) + return (0); + + MAC_CHECK(check_posix_sem_open, cred, ksemptr, ksemptr->ks_label); + + return(error); +} + +int +mac_check_posix_sem_getvalue(struct ucred *cred, struct ksem *ksemptr) +{ + int error; + + if (!mac_enforce_posix_sem) + return (0); + + MAC_CHECK(check_posix_sem_getvalue, cred, ksemptr, + ksemptr->ks_label); + + return(error); +} + +int +mac_check_posix_sem_post(struct ucred *cred, struct ksem *ksemptr) +{ + int error; + + if (!mac_enforce_posix_sem) + return (0); + + MAC_CHECK(check_posix_sem_post, cred, ksemptr, ksemptr->ks_label); + + return(error); +} + +int +mac_check_posix_sem_unlink(struct ucred *cred, struct ksem *ksemptr) +{ + int error; + + if (!mac_enforce_posix_sem) + return (0); + + MAC_CHECK(check_posix_sem_unlink, cred, ksemptr, ksemptr->ks_label); + + return(error); +} + +int +mac_check_posix_sem_wait(struct ucred *cred, struct ksem *ksemptr) +{ + int error; + + if (!mac_enforce_posix_sem) + return (0); + + MAC_CHECK(check_posix_sem_wait, cred, ksemptr, ksemptr->ks_label); + + return(error); +} |
