ovl: add NULL check in ovl_alloc_inode

This was detected by fault injection test Signed-off-by: Hirofumi Nakagawa <[email protected]> Fixes: 13cf199 ("ovl: allocate an ovl_inode struct") Cc: <[email protected]> # v4.13
vieko · Oct 19, 2017 · b3885bd · b3885bd
1 parent 33d930e
commit b3885bd
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
@@ -174,6 +174,9 @@ static struct inode *ovl_alloc_inode(struct super_block *sb)
 {
 	struct ovl_inode *oi = kmem_cache_alloc(ovl_inode_cachep, GFP_KERNEL);
 
+	if (!oi)
+		return NULL;
+
 	oi->cache = NULL;
 	oi->redirect = NULL;
 	oi->version = 0;