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Add ucred pointer to the SysV-related memory structures. This is required

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for racct.

Note that after this commit, ipcs(1) needs to be rebuilt.  Otherwise, it will
fail with "ipcs: sysctlbyname: kern.ipc.msqids: Cannot allocate memory".

Sponsored by:	The FreeBSD Foundation
Reviewed by:	kib (earlier version)
This commit is contained in:
Edward Tomasz Napierala 2011-04-06 16:59:54 +00:00
parent f497cda257
commit 8caddd81e2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=220388
6 changed files with 16 additions and 0 deletions
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5
sys/kern/sysv_msg.c
View File

@ -466,6 +466,9 @@ kern_msgctl(td, msqid, cmd, msqbuf)
}
#endif
crfree(msqkptr->cred);
msqkptr->cred = NULL;
/* Free the message headers */
msghdr = msqkptr->u.msg_first;
while (msghdr != NULL) {
@ -620,6 +623,8 @@ msgget(td, uap)
msqkptr->u.msg_perm.cgid = cred->cr_gid;
msqkptr->u.msg_perm.gid = cred->cr_gid;
msqkptr->u.msg_perm.mode = (msgflg & 0777);
crhold(cred);
msqkptr->cred = cred;
/* Make sure that the returned msqid is unique */
msqkptr->u.msg_perm.seq = (msqkptr->u.msg_perm.seq + 1) & 0x7fff;
msqkptr->u.msg_first = NULL;

4
sys/kern/sysv_sem.c
View File

@ -656,6 +656,8 @@ kern_semctl(struct thread *td, int semid, int semnum, int cmd,
semakptr->u.sem_perm.cuid = cred->cr_uid;
semakptr->u.sem_perm.uid = cred->cr_uid;
semakptr->u.sem_perm.mode = 0;
crfree(semakptr->cred);
semakptr->cred = NULL;
SEMUNDO_LOCK();
semundo_clear(semidx, -1);
SEMUNDO_UNLOCK();
@ -937,6 +939,8 @@ semget(struct thread *td, struct semget_args *uap)
sema[semid].u.sem_perm.cgid = cred->cr_gid;
sema[semid].u.sem_perm.gid = cred->cr_gid;
sema[semid].u.sem_perm.mode = (semflg & 0777) | SEM_ALLOC;
crhold(cred);
sema[semid].cred = cred;
sema[semid].u.sem_perm.seq =
(sema[semid].u.sem_perm.seq + 1) & 0x7fff;
sema[semid].u.sem_nsems = nsems;

4
sys/kern/sysv_shm.c
View File

@ -246,6 +246,8 @@ shm_deallocate_segment(shmseg)
#ifdef MAC
mac_sysvshm_cleanup(shmseg);
#endif
crfree(shmseg->cred);
shmseg->cred = NULL;
}
static int
@ -694,6 +696,8 @@ shmget_allocate_segment(td, uap, mode)
shmseg->u.shm_perm.cgid = shmseg->u.shm_perm.gid = cred->cr_gid;
shmseg->u.shm_perm.mode = (shmseg->u.shm_perm.mode & SHMSEG_WANTED) |
(mode & ACCESSPERMS) | SHMSEG_ALLOCATED;
crhold(cred);
shmseg->cred = cred;
shmseg->u.shm_segsz = uap->size;
shmseg->u.shm_cpid = td->td_proc->p_pid;
shmseg->u.shm_lpid = shmseg->u.shm_nattch = 0;

1
sys/sys/msg.h
View File

@ -160,6 +160,7 @@ struct msqid_kernel {
* Kernel-private components of the message queue.
*/
struct label *label; /* MAC label */
struct ucred *cred; /* creator's credentials */
};
#else /* !_KERNEL */

1
sys/sys/sem.h
View File

@ -126,6 +126,7 @@ extern struct seminfo seminfo;
struct semid_kernel {
struct semid_ds u;
struct label *label; /* MAC framework label */
struct ucred *cred; /* creator's credentials */
};
/* internal "mode" bits */

1
sys/sys/shm.h
View File

@ -124,6 +124,7 @@ struct shmid_kernel {
struct shmid_ds u;
vm_object_t object;
struct label *label; /* MAC label */
struct ucred *cred; /* creator's credendials */
};
extern struct shminfo shminfo;