This is a note to let you know that I've just added the patch titled

quota: Check for register_shrinker() failure.

to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: quota-check-for-register_shrinker-failure.patch and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Thu Feb 1 14:48:12 CET 2018

From: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp Date: Wed, 29 Nov 2017 22:34:50 +0900 Subject: quota: Check for register_shrinker() failure.

From: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp

[ Upstream commit 88bc0ede8d35edc969350852894dc864a2dc1859 ]

register_shrinker() might return -ENOMEM error since Linux 3.12. Call panic() as with other failure checks in this function if register_shrinker() failed.

Fixes: 1d3d4437eae1 ("vmscan: per-node deferred work") Signed-off-by: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp Cc: Jan Kara jack@suse.com Cc: Michal Hocko mhocko@suse.com Reviewed-by: Michal Hocko mhocko@suse.com Signed-off-by: Jan Kara jack@suse.cz Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/quota/dquot.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -2730,7 +2730,8 @@ static int __init dquot_init(void) printk("Dquot-cache hash table entries: %ld (order %ld, %ld bytes)\n", nr_hash, order, (PAGE_SIZE << order));

- register_shrinker(&dqcache_shrinker); + if (register_shrinker(&dqcache_shrinker)) + panic("Cannot register dquot shrinker");

return 0; }

Patches currently in stable-queue which might be from penguin-kernel@I-love.SAKURA.ne.jp are

queue-3.18/quota-check-for-register_shrinker-failure.patch