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=-20.2 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, USER_AGENT_GIT autolearn=unavailable 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 6F8E5C433F5 for ; Mon, 20 Sep 2021 16:59:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A8E161A54 for ; Mon, 20 Sep 2021 16:59:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245699AbhITRBS (ORCPT ); Mon, 20 Sep 2021 13:01:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:47902 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344211AbhITQ6g (ORCPT ); Mon, 20 Sep 2021 12:58:36 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 60100613AC; Mon, 20 Sep 2021 16:52:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1632156721; bh=nM9KDf4fQgUhc9doufy0Tl3PUKGDHTLP1Ze5aXqipoQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AaQiws+Ufrv17qZuKkh2+gAS7FcbsLETRQZXLMvowYws7FuinX3j/DHQXhaNFBEbp D+xVGUFH+DM6T6FmN5tqpMDAlBhBPJXPpTQzNOviSgylyrscHgPzjnhSQHlDmWzvNl S9veJUYsx3N47jDM/xirjianjRe4Ir0q/0LnIjxA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Marcel Holtmann , Sasha Levin Subject: [PATCH 4.9 055/175] Bluetooth: sco: prevent information leak in sco_conn_defer_accept() Date: Mon, 20 Sep 2021 18:41:44 +0200 Message-Id: <20210920163919.856026712@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210920163918.068823680@linuxfoundation.org> References: <20210920163918.068823680@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: linux-kernel@vger.kernel.org From: Dan Carpenter [ Upstream commit 59da0b38bc2ea570ede23a3332ecb3e7574ce6b2 ] Smatch complains that some of these struct members are not initialized leading to a stack information disclosure: net/bluetooth/sco.c:778 sco_conn_defer_accept() warn: check that 'cp.retrans_effort' doesn't leak information This seems like a valid warning. I've added a default case to fix this issue. Fixes: 2f69a82acf6f ("Bluetooth: Use voice setting in deferred SCO connection request") Signed-off-by: Dan Carpenter Signed-off-by: Marcel Holtmann Signed-off-by: Sasha Levin --- net/bluetooth/sco.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index 95fd7a837dc5..3174eab6eafc 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -763,6 +763,11 @@ static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting) cp.max_latency = cpu_to_le16(0xffff); cp.retrans_effort = 0xff; break; + default: + /* use CVSD settings as fallback */ + cp.max_latency = cpu_to_le16(0xffff); + cp.retrans_effort = 0xff; + break; } hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, -- 2.30.2