[CIFS] Return better error when server requires signing but client forbids
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 2459ef0..3d41916 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -11,7 +11,8 @@
leak that causes cifsd not to stop and rmmod to fail to cleanup
cifs_request_buffers pool. Fix problem with POSIX Open/Mkdir on
bigendian architectures. Fix possible memory corruption when
-EAGAIN returned on kern_recvmsg.
+EAGAIN returned on kern_recvmsg. Return better error if server
+requires packet signing but client has disabled it.
Version 1.50
------------
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index d22af63..2b2d4fe 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -663,10 +663,12 @@
/* MUST_SIGN already includes the MAY_SIGN FLAG
so if this is zero it means that signing is disabled */
cFYI(1, ("Signing disabled"));
- if (server->secMode & SECMODE_SIGN_REQUIRED)
+ if (server->secMode & SECMODE_SIGN_REQUIRED) {
cERROR(1, ("Server requires "
"packet signing to be enabled in "
"/proc/fs/cifs/SecurityFlags."));
+ rc = -EOPNOTSUPP;
+ }
server->secMode &=
~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
} else if ((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {