[048/126] cifs: Allow passwords which begin with a delimitor

From: Steven Rostedt
Date: Tue May 07 2013 - 00:01:01 EST


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

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

From: Sachin Prabhu <sprabhu@xxxxxxxxxx>

[ Upstream commit c369c9a4a7c82d33329d869cbaf93304cc7a0c40 ]

Fixes a regression in cifs_parse_mount_options where a password
which begins with a delimitor is parsed incorrectly as being a blank
password.

Signed-off-by: Sachin Prabhu <sprabhu@xxxxxxxxxx>
Acked-by: Jeff Layton <jlayton@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Steve French <sfrench@xxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
fs/cifs/connect.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index b39bb4a..487db09 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1489,14 +1489,24 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
}
break;
case Opt_blank_pass:
- vol->password = NULL;
- break;
- case Opt_pass:
/* passwords have to be handled differently
* to allow the character used for deliminator
* to be passed within them
*/

+ /*
+ * Check if this is a case where the password
+ * starts with a delimiter
+ */
+ tmp_end = strchr(data, '=');
+ tmp_end++;
+ if (!(tmp_end < end && tmp_end[1] == delim)) {
+ /* No it is not. Set the password to NULL */
+ vol->password = NULL;
+ break;
+ }
+ /* Yes it is. Drop down to Opt_pass below.*/
+ case Opt_pass:
/* Obtain the value string */
value = strchr(data, '=');
value++;
--
1.7.10.4


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