diff options
author | Eric W. Biederman <ebiederm@xmission.com> | 2018-03-22 20:52:43 -0500 |
---|---|---|
committer | Eric W. Biederman <ebiederm@xmission.com> | 2018-03-22 21:07:51 -0500 |
commit | aefad9593ec5ad4aae5346253a8b646364cd7317 (patch) | |
tree | 98f72912460afef0280f96f14880a8219c615f65 /ipc/sem.c | |
parent | dd206bec9a446884805370b1c16c1d7a97036777 (diff) | |
download | linux-stable-aefad9593ec5ad4aae5346253a8b646364cd7317.tar.gz linux-stable-aefad9593ec5ad4aae5346253a8b646364cd7317.tar.bz2 linux-stable-aefad9593ec5ad4aae5346253a8b646364cd7317.zip |
sem/security: Pass kern_ipc_perm not sem_array into the sem security hooks
All of the implementations of security hooks that take sem_array only
access sem_perm the struct kern_ipc_perm member. This means the
dependencies of the sem security hooks can be simplified by passing
the kern_ipc_perm member of sem_array.
Making this change will allow struct sem and struct sem_array
to become private to ipc/sem.c.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'ipc/sem.c')
-rw-r--r-- | ipc/sem.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/ipc/sem.c b/ipc/sem.c index a4af04979fd2..01f5c63670ae 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -265,7 +265,7 @@ static void sem_rcu_free(struct rcu_head *head) struct kern_ipc_perm *p = container_of(head, struct kern_ipc_perm, rcu); struct sem_array *sma = container_of(p, struct sem_array, sem_perm); - security_sem_free(sma); + security_sem_free(&sma->sem_perm); kvfree(sma); } @@ -495,7 +495,7 @@ static int newary(struct ipc_namespace *ns, struct ipc_params *params) sma->sem_perm.key = key; sma->sem_perm.security = NULL; - retval = security_sem_alloc(sma); + retval = security_sem_alloc(&sma->sem_perm); if (retval) { kvfree(sma); return retval; @@ -535,10 +535,7 @@ static int newary(struct ipc_namespace *ns, struct ipc_params *params) */ static inline int sem_security(struct kern_ipc_perm *ipcp, int semflg) { - struct sem_array *sma; - - sma = container_of(ipcp, struct sem_array, sem_perm); - return security_sem_associate(sma, semflg); + return security_sem_associate(ipcp, semflg); } /* @@ -1209,7 +1206,7 @@ static int semctl_stat(struct ipc_namespace *ns, int semid, if (ipcperms(ns, &sma->sem_perm, S_IRUGO)) goto out_unlock; - err = security_sem_semctl(sma, cmd); + err = security_sem_semctl(&sma->sem_perm, cmd); if (err) goto out_unlock; @@ -1300,7 +1297,7 @@ static int semctl_setval(struct ipc_namespace *ns, int semid, int semnum, return -EACCES; } - err = security_sem_semctl(sma, SETVAL); + err = security_sem_semctl(&sma->sem_perm, SETVAL); if (err) { rcu_read_unlock(); return -EACCES; @@ -1354,7 +1351,7 @@ static int semctl_main(struct ipc_namespace *ns, int semid, int semnum, if (ipcperms(ns, &sma->sem_perm, cmd == SETALL ? S_IWUGO : S_IRUGO)) goto out_rcu_wakeup; - err = security_sem_semctl(sma, cmd); + err = security_sem_semctl(&sma->sem_perm, cmd); if (err) goto out_rcu_wakeup; @@ -1545,7 +1542,7 @@ static int semctl_down(struct ipc_namespace *ns, int semid, sma = container_of(ipcp, struct sem_array, sem_perm); - err = security_sem_semctl(sma, cmd); + err = security_sem_semctl(&sma->sem_perm, cmd); if (err) goto out_unlock1; @@ -1962,7 +1959,7 @@ static long do_semtimedop(int semid, struct sembuf __user *tsops, goto out_free; } - error = security_sem_semop(sma, sops, nsops, alter); + error = security_sem_semop(&sma->sem_perm, sops, nsops, alter); if (error) { rcu_read_unlock(); goto out_free; |