From patchwork Mon Aug 8 08:26:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alicia Boya Garcia X-Patchwork-Id: 12938577 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 5CBADC00140 for ; Mon, 8 Aug 2022 08:26:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242177AbiHHI0m (ORCPT ); Mon, 8 Aug 2022 04:26:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234579AbiHHI0k (ORCPT ); Mon, 8 Aug 2022 04:26:40 -0400 Received: from mail-ej1-x630.google.com (mail-ej1-x630.google.com [IPv6:2a00:1450:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2182A13E38 for ; Mon, 8 Aug 2022 01:26:39 -0700 (PDT) Received: by mail-ej1-x630.google.com with SMTP id y13so15144563ejp.13 for ; Mon, 08 Aug 2022 01:26:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=edMOfYMdCtvC4J7YTp5fJyrkommSuPuxjJ8I4P+ayLA=; b=nj5/f48qEO/rM1DfEMGdZYKEBEsVLdCmGNAx1yZvOgjD8bfurkO8rmDl1g/f/zCsqU 60yYhDWxxU+CkuC9lsaj0LV5dBdkCRyevD1n3AtRp5jnmJej3zmmRJLny3GR8zIToGbs WDgP4HECMwucZCcPBPwIE7y/dW4BBUl1xEqGjXfJEY3uqWrcr9D1I97qBMOQ1Lsm8bcB /kohG9bVVwZ1a64nnrrQaPFrxJ6XCIdhFmEd98QaHYO8zDUzstiqiHprDyZb48FBe9ph stxdNHkCuLeF/rA2VXPZHq0YhZug5CG2j9I6+IxC5/OtAntWDcO1Mc1GBbQtGfgBJwLy QEBw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=edMOfYMdCtvC4J7YTp5fJyrkommSuPuxjJ8I4P+ayLA=; b=sTZ0lGPs3i/kqGFHA8FIQLUCaYLl40wZZoSqOv7ICLbsM0MV01SHN+YiF+MByZ6JSb px98oiDxe202v53HKa+XYwbN9YMaVfDfYWwdeKqywg1x9mys541wGOtwnGKL5LMgJn4b 21GANJZsnArQ4+MYrEpdUEgsQsHRFPmP+ZdH2vr3JULVMw+6brhCLooJACdvShfXmf+W emn2lrrIJ77o18j38L/ZqKnFMPepQNT8H1E3AUXdjQCZQ3q7LhCiHqw8t7l3551xzQb2 m0CjwbuIc3QMLKUjocOUidnPH6pqGGU9ctJp9+BDKS2RZiae4lf+FESDyOhqjXt1R68W y9BA== X-Gm-Message-State: ACgBeo0ly0SDeUc5sb6jhRSxoayKl27pd9kovMSxQHThCz8SuHdLFAx7 AHLW2SqqlkMdRTlAUCv4wemR7lvjOWYiwHZC X-Google-Smtp-Source: AA6agR5q5yEJo3DcXO8FTxx1Vdsoe4n7FyqQhSag9lGMIPwOiqXfEbS4z6TYc9XzvVjw6DMJ8+Gyjw== X-Received: by 2002:a17:907:6e1e:b0:730:a923:421d with SMTP id sd30-20020a1709076e1e00b00730a923421dmr13186650ejc.118.1659947198283; Mon, 08 Aug 2022 01:26:38 -0700 (PDT) Received: from cati.. (5.186.100.144.dhcp.fibianet.dk. [5.186.100.144]) by smtp.gmail.com with ESMTPSA id ky6-20020a170907778600b007307d099ed7sm4716228ejc.121.2022.08.08.01.26.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Aug 2022 01:26:37 -0700 (PDT) From: Alicia Boya Garcia To: linux-bluetooth@vger.kernel.org Cc: Alicia Boya Garcia Subject: [PATCH BlueZ 1/1] client: Fix uninitialized read in attribute handle Date: Mon, 8 Aug 2022 10:26:25 +0200 Message-Id: <20220808082624.146995-2-ntrrgc@gmail.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220808082624.146995-1-ntrrgc@gmail.com> References: <20220808082624.146995-1-ntrrgc@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org When services, characteristics and descriptors were parsed from DBus proxies the client code was calling the print code without initializing the `handle` field, which the print functions use. This resulted in semi-random or zero handles in all attributes when using gatt.list-attributes in bluetoothctl, depending on compilation flags. This patch fixes the problem by parsing the handle from the DBus proxy path. --- client/gatt.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/client/gatt.c b/client/gatt.c index 4c1efaf75..07a024605 100644 --- a/client/gatt.c +++ b/client/gatt.c @@ -158,6 +158,15 @@ static void print_inc_service(struct service *service, const char *description) service->uuid, text); } +static uint16_t handle_from_path(const char *path) +{ + const char *number = path + strlen(path) - 4; + if (number < path) + return 0; + + return (uint16_t) strtol(number, NULL, 16); +} + static void print_service_proxy(GDBusProxy *proxy, const char *description) { struct service service; @@ -179,6 +188,7 @@ static void print_service_proxy(GDBusProxy *proxy, const char *description) service.path = (char *) g_dbus_proxy_get_path(proxy); service.uuid = (char *) uuid; service.primary = primary; + service.handle = handle_from_path(service.path); print_service(&service, description); } @@ -261,6 +271,7 @@ static void print_characteristic(GDBusProxy *proxy, const char *description) memset(&chrc, 0, sizeof(chrc)); chrc.path = (char *) g_dbus_proxy_get_path(proxy); chrc.uuid = (char *) uuid; + chrc.handle = handle_from_path(chrc.path); print_chrc(&chrc, description); } @@ -355,6 +366,7 @@ static void print_descriptor(GDBusProxy *proxy, const char *description) memset(&desc, 0, sizeof(desc)); desc.path = (char *) g_dbus_proxy_get_path(proxy); desc.uuid = (char *) uuid; + desc.handle = handle_from_path(desc.path); print_desc(&desc, description); }