From 2bd50fb3d4d31f5168ecea221f291534cd0a96e9 Mon Sep 17 00:00:00 2001
From: Taesoo Kim <tsgatesv@gmail.com>
Date: Sat, 21 Mar 2015 19:08:30 -0400
Subject: [PATCH] cifs: potential memory leaks when parsing mnt opts

For example, when mount opt is redundently specified
(e.g., "user=A,user=B,user=C"), kernel kept allocating new key/val
with kstrdup() and overwrite previous ptr (to be freed).

Althouhg mount.cifs in userspace performs a bit of sanitization
(e.g., forcing one user option), current implementation is not
robust. Other options such as iocharset and domainanme are similarly
vulnerable.

Signed-off-by: Taesoo Kim <tsgatesv@gmail.com>
Signed-off-by: Steve French <smfrench@gmail.com>
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