From patchwork Thu Jul 4 09:07:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Smirnov X-Patchwork-Id: 810066 Received: from mx01.omp.ru (mx01.omp.ru [90.154.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E16CE1A4F2B for ; Thu, 4 Jul 2024 09:08:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.154.21.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720084110; cv=none; b=X7djPY3oJhVUoqVT+Ngmkz9QLpjZcFoMta6Nx1MhE69OUAxvDfzNGk6qnE4kyhVKbn/oGi+KZG/j7odP3CoBJUpBQ5xeVp0xjglD0zRKp4NIsOGT721X7dSRU1bvDBvdX/5o4GxS9WipPEMknwOtzgN7d9II9qMw7bsj0DJ1wUM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720084110; c=relaxed/simple; bh=xmE/3st/WNbHueSfgiZvWHYu5FfznyOA/5J+X25kIHM=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=hUH9JV1APp7MWrF6zNKSOHzi5K2QWcY/JVhwd9RppsAXG5uP9H9yJzbGMWCjJQzUOYF4XXReO9pq/CV/2TnU0hSULvxp5Kf1LYaL/OANyPgWLRUbGw1nPZxLKjL4r2P5s8OQEyQDTW0z44AOmP+6u+bZ7MIS46X4nV+Y9UwqvoY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=omp.ru; spf=pass smtp.mailfrom=omp.ru; arc=none smtp.client-ip=90.154.21.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=omp.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=omp.ru Received: from localhost.localdomain (217.23.187.157) by msexch01.omp.ru (10.188.4.12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.1258.12; Thu, 4 Jul 2024 12:08:17 +0300 From: Roman Smirnov To: CC: Roman Smirnov Subject: [PATCH BlueZ v2 1/3] shared/vcp: prevent dereferencing of NULL pointers Date: Thu, 4 Jul 2024 12:07:52 +0300 Message-ID: <20240704090756.31351-2-r.smirnov@omp.ru> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240704090756.31351-1-r.smirnov@omp.ru> References: <20240704090756.31351-1-r.smirnov@omp.ru> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: msexch01.omp.ru (10.188.4.12) To msexch01.omp.ru (10.188.4.12) X-KSE-ServerInfo: msexch01.omp.ru, 9 X-KSE-AntiSpam-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 6.1.0, Database issued on: 07/04/2024 08:52:56 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 59 X-KSE-AntiSpam-Info: Lua profiles 186322 [Jul 04 2024] X-KSE-AntiSpam-Info: Version: 6.1.0.4 X-KSE-AntiSpam-Info: Envelope from: r.smirnov@omp.ru X-KSE-AntiSpam-Info: LuaCore: 21 0.3.21 ebee5449fc125b2da45f1a6a6bc2c5c0c3ad0e05 X-KSE-AntiSpam-Info: {rep_avail} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: {relay has no DNS name} X-KSE-AntiSpam-Info: {SMTP from is not routable} X-KSE-AntiSpam-Info: {Found in DNSBL: 217.23.187.157 in (user) b.barracudacentral.org} X-KSE-AntiSpam-Info: 127.0.0.199:7.1.2; omp.ru:7.1.1; d41d8cd98f00b204e9800998ecf8427e.com:7.1.1; 217.23.187.157:7.1.2 X-KSE-AntiSpam-Info: FromAlignment: s X-KSE-AntiSpam-Info: {rdns complete} X-KSE-AntiSpam-Info: {fromrtbl complete} X-KSE-AntiSpam-Info: ApMailHostAddress: 217.23.187.157 X-KSE-AntiSpam-Info: {DNS response errors} X-KSE-AntiSpam-Info: Rate: 59 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-AntiSpam-Info: Auth:dmarc=none header.from=omp.ru;spf=none smtp.mailfrom=omp.ru;dkim=none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Heuristic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 07/04/2024 08:56:00 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: Clean, bases: 7/4/2024 6:00:00 AM X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: InTheLimit Using util_memdup() will terminate the program if memory allocation fails. Found with the SVACE static analysis tool. --- V1 -> V2: util_memdup() is used instead of checking for NULL src/shared/vcp.c | 20 ++++---------------- 1 file changed, 4 insertions(+), 16 deletions(-) diff --git a/src/shared/vcp.c b/src/shared/vcp.c index 06264a241..4597bebf6 100644 --- a/src/shared/vcp.c +++ b/src/shared/vcp.c @@ -2127,14 +2127,8 @@ static void read_vocs_audio_descriptor(struct bt_vcp *vcp, bool success, return; } - vocs_ao_dec_r = malloc(length+1); - memset(vocs_ao_dec_r, 0, length+1); - memcpy(vocs_ao_dec_r, value, length); - - if (!vocs_ao_dec_r) { - DBG(vcp, "Unable to get VOCS Audio Descriptor"); - return; - } + vocs_ao_dec_r = util_memdup(value, length + 1); + memset(vocs_ao_dec_r + length, 0, 1); DBG(vcp, "VOCS Audio Descriptor: %s", vocs_ao_dec_r); free(vocs_ao_dec_r); @@ -2531,14 +2525,8 @@ static void read_aics_audio_ip_description(struct bt_vcp *vcp, bool success, return; } - ip_descrptn = malloc(length+1); - memset(ip_descrptn, 0, length+1); - memcpy(ip_descrptn, value, length); - - if (!ip_descrptn) { - DBG(vcp, "Unable to get Audio Input Description"); - return; - } + ip_descrptn = util_memdup(value, length + 1); + memset(ip_descrptn + length, 0, 1); DBG(vcp, "Audio Input Description: %s", ip_descrptn); free(ip_descrptn);