From: Hirofumi Nakagawa <nklabs@gmail.com>
Date: Mon, 25 Sep 2017 18:09:53 +0000 (+0900)
Subject: ovl: add NULL check in ovl_alloc_inode
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b3885bd6edb41b91a0e3976469f72ae31bfb8d95;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

ovl: add NULL check in ovl_alloc_inode

This was detected by fault injection test

Signed-off-by: Hirofumi Nakagawa <nklabs@gmail.com>
Fixes: 13cf199d0088 ("ovl: allocate an ovl_inode struct")
Cc: <stable@vger.kernel.org> # v4.13
---

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 092d150643c1..f5738e96a052 100644
--- 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;