Patch "Fix SMB3.1.1 guest authentication to Samba" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

Fix SMB3.1.1 guest authentication to Samba

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
fix-smb3.1.1-guest-authentication-to-samba.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Steve French <[email protected]>
Date: Mon, 18 Sep 2017 18:18:45 -0500
Subject: Fix SMB3.1.1 guest authentication to Samba

From: Steve French <[email protected]>

commit 23586b66d84ba3184b8820277f3fc42761640f87 upstream.

Samba rejects SMB3.1.1 dialect (vers=3.1.1) negotiate requests from the kernel client due to the two byte pad at the end of the negotiate contexts.

---
 fs/cifs/smb2pdu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -366,7 +366,7 @@ assemble_neg_contexts(struct smb2_negoti
 	build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
 	req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
 	req->NegotiateContextCount = cpu_to_le16(2);
-	inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
+	inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context)
 			+ sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
 }
 #else

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/cifs-release-cifs-root_cred-after-exit_cifs.patch queue-4.9/smb3-warn-user-if-trying-to-sign-connection-that-authenticated-as-guest.patch queue-4.9/smb3-don-t-ignore-o_sync-o_dsync-and-o_direct-flags.patch queue-4.9/fix-smb3.1.1-guest-authentication-to-samba.patch queue-4.9/cifs-release-auth_key.response-for-reconnect.patch queue-4.9/smb-validate-negotiate-to-protect-against-downgrade-even-if-signing-off.patch