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| author | Jiri Slaby <jslaby@suse.cz> | 2010-03-10 15:23:05 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 15:52:39 -0800 |
| commit | f1eb1332b8f07e937add24c6fd2ac40b8737a2f4 (patch) | |
| tree | 43bfaac596ae20dcab088b870406e58a2bb4b78a /ipc/shm.c | |
| parent | d6db2ade10852b7c665b361239c3411abaa880b5 (diff) | |
| download | lwn-f1eb1332b8f07e937add24c6fd2ac40b8737a2f4.tar.gz lwn-f1eb1332b8f07e937add24c6fd2ac40b8737a2f4.zip | |
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>
Diffstat (limited to 'ipc/shm.c')
| -rw-r--r-- | ipc/shm.c | 3 |
1 files changed, 1 insertions, 2 deletions
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; } |