From 6188f28bf608ddecc2377663b0f2f709440c19ba Mon Sep 17 00:00:00 2001 From: Steve French Date: Tue, 13 Mar 2018 02:29:36 -0500 Subject: Tree connect for SMB3.1.1 must be signed for non-encrypted shares SMB3.1.1 tree connect was only being signed when signing was mandatory but needs to always be signed (for non-guest users). See MS-SMB2 section 3.2.4.1.1 Signed-off-by: Steve French Reviewed-by: Pavel Shilovsky CC: Stable --- fs/cifs/smb2pdu.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'fs/cifs') diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 4b6920de2541..af62c75b17c4 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1305,6 +1305,11 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, iov[1].iov_base = unc_path; iov[1].iov_len = unc_path_len; + /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */ + if ((ses->server->dialect == SMB311_PROT_ID) && + !encryption_required(tcon)) + req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED; + rc = smb2_send_recv(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov); cifs_small_buf_release(req); rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base; -- cgit v1.2.3