Subject: + ipcshm-shorten-critical-region-for-shmat-fix.patch added to -mm tree
To: sasha.levin@xxxxxxxxxx,manfred@xxxxxxxxxxxxxxxx,riel@xxxxxxxxxx,sedat.dilek@xxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 05 Aug 2013 14:57:45 -0700
The patch titled
Subject: ipc,shm: dont leave do_shmat with rcu lock held
has been added to the -mm tree. Its filename is
ipcshm-shorten-critical-region-for-shmat-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ipcshm-shorten-critical-region-for-shmat-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ipcshm-shorten-critical-region-for-shmat-fix.patch
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------------------------------------------------------
From: Sasha Levin <sasha.levin@xxxxxxxxxx>
Subject: ipc,shm: dont leave do_shmat with rcu lock held
Commit "ipc,shm: shorten critical region for shmat" had an issue that allowed
us to exit do_shmat() without releasing the rcu lock that was taken previously
in the function.
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
Cc: Sedat Dilek <sedat.dilek@xxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
ipc/shm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN ipc/shm.c~ipcshm-shorten-critical-region-for-shmat-fix ipc/shm.c
--- a/ipc/shm.c~ipcshm-shorten-critical-region-for-shmat-fix
+++ a/ipc/shm.c
@@ -1093,7 +1093,7 @@ long do_shmat(int shmid, char __user *sh
shp = shm_obtain_object_check(ns, shmid);
if (IS_ERR(shp)) {
err = PTR_ERR(shp);
- goto out;
+ goto out_unlock;
}
err = -EACCES;
_
Patches currently in -mm which might be from sasha.levin@xxxxxxxxxx are
watchdog-trigger-all-cpu-backtrace-when-locked-up-and-going-to-panic.patch
ipcshm-shorten-critical-region-for-shmat-fix.patch
linux-next.patch
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