From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F65FC47080 for ; Mon, 31 May 2021 14:14:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 330F061370 for ; Mon, 31 May 2021 14:14:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231627AbhEaOP7 (ORCPT ); Mon, 31 May 2021 10:15:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:42684 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233380AbhEaOMa (ORCPT ); Mon, 31 May 2021 10:12:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 49C7A6198B; Mon, 31 May 2021 13:41:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1622468497; bh=nrZZOR0cqqyLdQnJ7LhlM7tt7ZWKwpEgzWUh8sp6Kd0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VFnxNVa5yBHmCAznDJW5NCuRguk6zY5kJoxx8q/0v+8AfYs8Myk1Osc/Fev94Oo7p 2xJPSWk6Ahe6/jtuS6JGrIuRsz/rMsZX4pD8hlv2QdZiIIdYF9Jr+DMicZo3U25a3x 2b/wPkJF0nsvSTEZb6z+jYjwuvrns1Qc6hkCh7Bg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Aurelien Aptel , Steve French Subject: [PATCH 5.4 004/177] cifs: set server->cipher_type to AES-128-CCM for SMB3.0 Date: Mon, 31 May 2021 15:12:41 +0200 Message-Id: <20210531130648.048394727@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210531130647.887605866@linuxfoundation.org> References: <20210531130647.887605866@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Aurelien Aptel commit 6d2fcfe6b517fe7cbf2687adfb0a16cdcd5d9243 upstream. SMB3.0 doesn't have encryption negotiate context but simply uses the SMB2_GLOBAL_CAP_ENCRYPTION flag. When that flag is present in the neg response cifs.ko uses AES-128-CCM which is the only cipher available in this context. cipher_type was set to the server cipher only when parsing encryption negotiate context (SMB3.1.1). For SMB3.0 it was set to 0. This means cipher_type value can be 0 or 1 for AES-128-CCM. Fix this by checking for SMB3.0 and encryption capability and setting cipher_type appropriately. Signed-off-by: Aurelien Aptel Cc: Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/cifs/smb2pdu.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -979,6 +979,13 @@ SMB2_negotiate(const unsigned int xid, s /* Internal types */ server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; + /* + * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context + * Set the cipher type manually. + */ + if (server->dialect == SMB30_PROT_ID && (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) + server->cipher_type = SMB2_ENCRYPTION_AES128_CCM; + security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, (struct smb2_sync_hdr *)rsp); /*