linux-kernel - [PATCH 4.1 265/267] hpfs: kstrdup() out of memory handling

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Date:	Fri, 31 Jul 2015 12:41:56 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Sanidhya Kashyap <sanidhya.gatech@...il.com>,
	Mikulas Patocka <mikulas@...bright.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 4.1 265/267] hpfs: kstrdup() out of memory handling

4.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sanidhya Kashyap <sanidhya.gatech@...il.com>

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@...il.com>
Signed-off-by: Mikulas Patocka <mikulas@...bright.com>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -424,11 +424,14 @@ 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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