gfs2: Fix memory leak when gfs2meta's fs_context is freed

gfs2 and gfs2meta share an ->init_fs_context function which allocates an
args structure stored in fc->fs_private. gfs2 registers a ->free
function to free this memory when the fs_context is cleaned up, but
there was not one registered for gfs2meta, causing a leak.

Register a ->free function for gfs2meta. The existing gfs2_fc_free
function does what we need.

Reported-by: syzbot+c2fdfd2b783754878fb6@syzkaller.appspotmail.com
Fixes: c15b787566a5 ("gfs2: Convert gfs2 to fs_context")
Signed-off-by: Andrew Price <anprice@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 681b44682b0db6a6016303ec515c291720e6ff32..dc61af2c4d5ec6dda669b70de1f5aa6ce6b8507d 100644 (file)
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1600,6 +1600,7 @@ static int gfs2_meta_get_tree(struct fs_context *fc)
 }
 
 static const struct fs_context_operations gfs2_meta_context_ops = {
+       .free        = gfs2_fc_free,
        .get_tree    = gfs2_meta_get_tree,
 };