From 0a4cdc47f96f44c55cfa5a80ff383db2304dd734 Mon Sep 17 00:00:00 2001
From: Sanidhya Kashyap <sanidhya.gatech@gmail.com>
Date: Sat, 21 Mar 2015 12:57:50 -0400
Subject: [PATCH] hpfs: kstrdup() out of memory handling

commit ce657611baf902f14ae559ce4e0787ead6712067 upstream.

There is a possibility of nothing being allocated to the new_opts in
case of memory pressure, therefore return ENOMEM for such case.

Signed-off-by: Sanidhya Kashyap <sanidhya.gatech@gmail.com>
Signed-off-by: Mikulas Patocka <mikulas@twibright.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[lizf: Backported to 3.4: adjust context]
Signed-off-by: Zefan Li <lizefan@huawei.com>
---
 fs/hpfs/super.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 0bf578dbfce7f..0b990b288aff9 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -385,9 +385,13 @@ static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
 	int o;
 	struct hpfs_sb_info *sbi = hpfs_sb(s);
 	char *new_opts = kstrdup(data, GFP_KERNEL);
-	
+
+
+	if (!new_opts)
+		return -ENOMEM;
+
 	*flags |= MS_NOATIME;
-	
+
 	hpfs_lock(s);
 	lock_super(s);
 	uid = sbi->sb_uid; gid = sbi->sb_gid;
-- 
2.47.2