Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d68aab6b authored by Niu Yawei's avatar Niu Yawei Committed by Jan Kara
Browse files

quota: missing lock in dqcache_shrink_scan() 



Commit 1ab6c499 (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.

CC: stable@vger.kernel.org
Fixes: 1ab6c499
Signed-off-by: default avatarNiu Yawei <yawei.niu@intel.com>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 1795cd9b

fs/quota/dquot.c

+2 −0
Original line number Diff line number Diff line
@@ -702,6 +702,7 @@ dqcache_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) 
	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 *shrink, struct shrink_control *sc) 
		freed++;

		head = free_dquots.prev;

	}

	spin_unlock(&dq_list_lock);

	return freed;

}