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From: Mikulas Patocka <mikulas@twibright.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH] hpfs: kstrdup() out of memory handling
Date: Sun, 28 Jun 2015 15:20:47 +0200 (CEST)
Message-ID: <alpine.DEB.2.00.1506281519220.29365@leontynka> (raw)

From: Sanidhya Kashyap <sanidhya.gatech@gmail.com>
Date: Sat, 21 Mar 2015 12:57:50 -0400

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>
Cc: stable@vger.kernel.org

---
 fs/hpfs/super.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Index: linux-2.6/fs/hpfs/super.c
===================================================================
--- linux-2.6.orig/fs/hpfs/super.c	2015-06-28 14:43:48.000000000 +0200
+++ linux-2.6/fs/hpfs/super.c	2015-06-28 14:45:11.000000000 +0200
@@ -459,11 +459,14 @@ static int hpfs_remount_fs(struct super_
 	int o;
 	struct hpfs_sb_info *sbi = hpfs_sb(s);
 	char *new_opts = kstrdup(data, GFP_KERNEL);
-	
+
+	if (!new_opts)
+		return -ENOMEM;
+
 	sync_filesystem(s);
 
 	*flags |= MS_NOATIME;
-	
+
 	hpfs_lock(s);
 	uid = sbi->sb_uid; gid = sbi->sb_gid;
 	umask = 0777 & ~sbi->sb_mode;

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