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authorJiri Slaby <jslaby@suse.cz>2010-03-10 15:23:05 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-12 15:52:39 -0800
commitf1eb1332b8f07e937add24c6fd2ac40b8737a2f4 (patch)
tree43bfaac596ae20dcab088b870406e58a2bb4b78a
parentd6db2ade10852b7c665b361239c3411abaa880b5 (diff)
downloadlinux-stericsson-f1eb1332b8f07e937add24c6fd2ac40b8737a2f4.tar.gz
ipc: use rlimit helpers
Make sure compiler won't do weird things with limits. E.g. fetching them twice may return 2 different values after writable limits are implemented. I.e. either use rlimit helpers added in 3e10e716abf3c71bdb5d86b8f507f9e72236c9cd ("resource: add helpers for fetching rlimits") or ACCESS_ONCE if not applicable. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--ipc/mqueue.c2
-rw-r--r--ipc/shm.c3
2 files changed, 2 insertions, 3 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index b6cb06451f4b..e4e3f04803ca 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -155,7 +155,7 @@ static struct inode *mqueue_get_inode(struct super_block *sb,
spin_lock(&mq_lock);
if (u->mq_bytes + mq_bytes < u->mq_bytes ||
u->mq_bytes + mq_bytes >
- p->signal->rlim[RLIMIT_MSGQUEUE].rlim_cur) {
+ task_rlimit(p, RLIMIT_MSGQUEUE)) {
spin_unlock(&mq_lock);
kfree(info->messages);
goto out_inode;
diff --git a/ipc/shm.c b/ipc/shm.c
index 23256b855819..1a314c89f93c 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -764,8 +764,7 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
if (euid != shp->shm_perm.uid &&
euid != shp->shm_perm.cuid)
goto out_unlock;
- if (cmd == SHM_LOCK &&
- !current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur)
+ if (cmd == SHM_LOCK && !rlimit(RLIMIT_MEMLOCK))
goto out_unlock;
}