From: Sanidhya Kashyap <sanidhya.gatech@gmail.com>
Date: Thu, 16 Apr 2015 19:48:26 +0000 (-0700)
Subject: affs: kstrdup() memory handling
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c8f33d0bec999a4f2b5c3f9380361b88ce6f6ab0;p=linux-beck.git

affs: kstrdup() memory handling

There is a possibility of kstrdup() failure upon memory pressure.
Therefore, returning ENOMEM even for new_opts.

[akpm@linux-foundation.org: cleanup]
Signed-off-by: Sanidhya Kashyap <sanidhya.gatech@gmail.com>
Cc: Taesoo kim <taesoo@gatech.edu>
Cc: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/affs/super.c b/fs/affs/super.c
index 6819d0426af5..3f89c9e05b40 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -521,10 +521,14 @@ affs_remount(struct super_block *sb, int *flags, char *data)
 	int			 root_block;
 	unsigned long		 mount_flags;
 	int			 res = 0;
-	char			*new_opts = kstrdup(data, GFP_KERNEL);
+	char			*new_opts;
 	char			 volume[32];
 	char			*prefix = NULL;
 
+	new_opts = kstrdup(data, GFP_KERNEL);
+	if (!new_opts)
+		return -ENOMEM;
+
 	pr_debug("%s(flags=0x%x,opts=\"%s\")\n", __func__, *flags, data);
 
 	sync_filesystem(sb);