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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4854C77B73 for ; Mon, 22 May 2023 19:22:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234385AbjEVTWF (ORCPT ); Mon, 22 May 2023 15:22:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234432AbjEVTWF (ORCPT ); Mon, 22 May 2023 15:22:05 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 52E88DC for ; Mon, 22 May 2023 12:22:04 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id E336162844 for ; Mon, 22 May 2023 19:22:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 456C1C433EF; Mon, 22 May 2023 19:22:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684783323; bh=GxD2ID5KVjq+cl2uQ1Hw2o5l7NRbIEZADlSPJtVSHac=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nyKv110frojzncjTkEaCplsOwuURQnaVvwTrLknllcwfJQzC9SaH3oHZv7vizNbp7 R2qKWevKZdMnIZwYjw+p3URluauROghE6wzdObaogWA9yZx2RkAcL8bqyGomFvK7I5 iPePUfGY6BZvXuJb/lupFzog4+mgQbKj0PMrb0lQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chih-Yen Chang , Namjae Jeon , Steve French Subject: [PATCH 5.15 186/203] ksmbd: allocate one more byte for implied bcc[0] Date: Mon, 22 May 2023 20:10:10 +0100 Message-Id: <20230522190400.163664397@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230522190354.935300867@linuxfoundation.org> References: <20230522190354.935300867@linuxfoundation.org> User-Agent: quilt/0.67 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: Chih-Yen Chang commit 443d61d1fa9faa60ef925513d83742902390100f upstream. ksmbd_smb2_check_message allows client to return one byte more, so we need to allocate additional memory in ksmbd_conn_handler_loop to avoid out-of-bound access. Cc: stable@vger.kernel.org Signed-off-by: Chih-Yen Chang Acked-by: Namjae Jeon Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/ksmbd/connection.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/fs/ksmbd/connection.c +++ b/fs/ksmbd/connection.c @@ -320,7 +320,8 @@ int ksmbd_conn_handler_loop(void *p) break; /* 4 for rfc1002 length field */ - size = pdu_size + 4; + /* 1 for implied bcc[0] */ + size = pdu_size + 4 + 1; conn->request_buf = kvmalloc(size, GFP_KERNEL); if (!conn->request_buf) break;