Commit c36b97e9 authored Oct 29, 2015 by Bob Peterson

GFS2: Protect freeing directory hash table with i_lock spin_lock



This patch changes function gfs2_dir_hash_inval so it uses the
i_lock spin_lock to protect the in-core hash table, i_hash_cache.
This will prevent double-frees due to a race between gfs2_evict_inode
and inode invalidation.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>

parent f3dd1649

fs/gfs2/dir.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -388,8 +388,13 @@ static __be64 gfs2_dir_get_hash_table(struct gfs2_inode ip)
		*/
		void gfs2_dir_hash_inval(struct gfs2_inode *ip)
		{
		__be64 *hc = ip->i_hash_cache;
		__be64 *hc;

		spin_lock(&ip->i_inode.i_lock);
		hc = ip->i_hash_cache;
		ip->i_hash_cache = NULL;
		spin_unlock(&ip->i_inode.i_lock);

		kvfree(hc);
		}

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