[34-longterm 142/179] cifs: check for NULL session password

[Paul Gortmaker]

From: Jeff Layton <jlayton@xxxxxxxxxx>

                   -------------------
    This is a commit scheduled for the next v2.6.34 longterm release.
    http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git
    If you see a problem with using this for longterm, please comment.
                   -------------------

commit 24e6cf92fde1f140d8eb0bf7cd24c2c78149b6b2 upstream.

It's possible for a cifsSesInfo struct to have a NULL password, so we
need to check for that prior to running strncmp on it.

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Steve French <sfrench@xxxxxxxxxx>
Signed-off-by: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
---
 fs/cifs/connect.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 0fbc8d2..f31ad2d 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1609,6 +1609,7 @@ cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
 				    MAX_USERNAME_SIZE))
 				continue;
 			if (strlen(vol->username) != 0 &&
+			    ses->password != NULL &&
 			    strncmp(ses->password,
 				    vol->password ? vol->password : "",
 				    MAX_PASSWORD_SIZE))
-- 
1.7.9.6

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