[PATCH] cifs: make sure we ignore the credentials= and cred= options

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Older mount.cifs programs passed this on to the kernel after parsing
the file. Make sure the kernel ignores that option.

Should fix:

    https://bugzilla.kernel.org/show_bug.cgi?id=43195

Cc: Sachin Prabhu <sprabhu@xxxxxxxxxx>
Reported-by: Ronald <ronald645@xxxxxxxxx>
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/cifs/connect.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index a75902b..5dcc551 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -215,6 +215,8 @@ static const match_table_t cifs_mount_option_tokens = {
 
 	{ Opt_ignore, "cred" },
 	{ Opt_ignore, "credentials" },
+	{ Opt_ignore, "cred=%s" },
+	{ Opt_ignore, "credentials=%s" },
 	{ Opt_ignore, "guest" },
 	{ Opt_ignore, "rw" },
 	{ Opt_ignore, "ro" },
-- 
1.7.7.6

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