From f1eb1332b8f07e937add24c6fd2ac40b8737a2f4 Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jslaby@suse.cz>
Date: Wed, 10 Mar 2010 15:23:05 -0800
Subject: [PATCH] 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>
---
ipc/mqueue.c | 2 +-
ipc/shm.c | 3 +--
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index b6cb06451f4be..e4e3f04803ca9 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 23256b8558193..1a314c89f93cf 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;
}
--
GitLab