From: Sanidhya Kashyap <sanidhya.gatech@gmail.com>
Date: Sat, 21 Mar 2015 16:57:50 +0000 (-0400)
Subject: hpfs: kstrdup() out of memory handling
X-Git-Tag: v3.16.35~1643
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5bbb9aca6b4e1f6a2093fb840216e4ba4266e592;p=thirdparty%2Fkernel%2Fstable.git

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>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 7cd00d3a7c9b7..e12a06b300e0a 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -424,11 +424,14 @@ 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;
+
 	sync_filesystem(s);
 
 	*flags |= MS_NOATIME;
-	
+
 	hpfs_lock(s);
 	uid = sbi->sb_uid; gid = sbi->sb_gid;
 	umask = 0777 & ~sbi->sb_mode;