This is a note to let you know that I've just added the patch titled
quota: missing lock in dqcache_shrink_scan()
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
quota-missing-lock-in-dqcache_shrink_scan.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From d68aab6b8f572406aa93b45ef6483934dd3b54a6 Mon Sep 17 00:00:00 2001
From: Niu Yawei <[email protected]>
Date: Wed, 4 Jun 2014 12:22:13 +0800
Subject: quota: missing lock in dqcache_shrink_scan()
From: Niu Yawei <[email protected]>
commit d68aab6b8f572406aa93b45ef6483934dd3b54a6 upstream.
Commit 1ab6c4997e04 (fs: convert fs shrinkers to new scan/count API)
accidentally removed locking from quota shrinker. Fix it -
dqcache_shrink_scan() should use dq_list_lock to protect the
scan on free_dquots list.
Fixes: 1ab6c4997e04a00c50c6d786c2f046adc0d1f5de
Signed-off-by: Niu Yawei <[email protected]>
Signed-off-by: Jan Kara <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/quota/dquot.c | 2 ++
1 file changed, 2 insertions(+)
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -702,6 +702,7 @@ dqcache_shrink_scan(struct shrinker *shr
struct dquot *dquot;
unsigned long freed = 0;
+ spin_lock(&dq_list_lock);
head = free_dquots.prev;
while (head != &free_dquots && sc->nr_to_scan) {
dquot = list_entry(head, struct dquot, dq_free);
@@ -713,6 +714,7 @@ dqcache_shrink_scan(struct shrinker *shr
freed++;
head = free_dquots.prev;
}
+ spin_unlock(&dq_list_lock);
return freed;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.14/quota-missing-lock-in-dqcache_shrink_scan.patch
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