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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 36E7FC433ED for ; Mon, 19 Apr 2021 15:02:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 127F161029 for ; Mon, 19 Apr 2021 15:02:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240660AbhDSPCa (ORCPT ); Mon, 19 Apr 2021 11:02:30 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:56640 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239586AbhDSPC3 (ORCPT ); Mon, 19 Apr 2021 11:02:29 -0400 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 13JEY350063432 for ; Mon, 19 Apr 2021 11:02:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=VUOGGhhTvxxg5pW0BbgZgrUZRYXuFgYJYDI+OeysVIA=; b=s50mzSQU/v+LiwdCKaOqk6Dq13v2dTWwrKSmxYJO5PYcpg5Q7digA01GWUL9BqrsJkRk U8+OkzRaKhE59kyLDQaXJMMrLIFzbUpzo9v/gOFNpG9RGaAPQCs6XRZMimtMGU4mOX6P ErlpLxQ48VBwe5gr3EfvAL+AgyZsFEY07cRkT1waTMcnlG/DURHGOlsx2ebxoLIpfe4g ypotq/KJB5L/12lGHP0GznCsj9Quu2orDuk3U09DjSJfxhJpzU92mj7hBfypt5bOqFUE OPTIir2617uQyhNDRQyi049wkG8JPYCorpoFxZLasgF57akL92VrIYbaefaiEfbuZJJu wg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 380d6uv8fb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 19 Apr 2021 11:01:59 -0400 Received: from m0098409.ppops.net (m0098409.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 13JEZK7P068416 for ; Mon, 19 Apr 2021 11:01:59 -0400 Received: from ppma01dal.us.ibm.com (83.d6.3fa9.ip4.static.sl-reverse.com [169.63.214.131]) by mx0a-001b2d01.pphosted.com with ESMTP id 380d6uv8et-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 Apr 2021 11:01:59 -0400 Received: from pps.filterd (ppma01dal.us.ibm.com [127.0.0.1]) by ppma01dal.us.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 13JErcIW021478; Mon, 19 Apr 2021 15:01:57 GMT Received: from b03cxnp08026.gho.boulder.ibm.com (b03cxnp08026.gho.boulder.ibm.com [9.17.130.18]) by ppma01dal.us.ibm.com with ESMTP id 37yqa9qe4v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 Apr 2021 15:01:57 +0000 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 13JF1uxH17170798 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 19 Apr 2021 15:01:56 GMT Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 14E96136063; Mon, 19 Apr 2021 15:01:56 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AE57D13604F; Mon, 19 Apr 2021 15:01:55 +0000 (GMT) Received: from localhost.localdomain (unknown [9.47.158.155]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 19 Apr 2021 15:01:55 +0000 (GMT) From: Stefan Berger To: linux-integrity@vger.kernel.org Cc: zohar@linux.ibm.com, dmitry.kasatkin@gmail.com, Stefan Berger Subject: [PATCH 1/6] libimaevm: Properly check for error returned by EVP_DigestUpdate Date: Mon, 19 Apr 2021 11:01:46 -0400 Message-Id: <20210419150151.236409-2-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210419150151.236409-1-stefanb@linux.ibm.com> References: <20210419150151.236409-1-stefanb@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 54AwuZEWPbZtyxJGUvrFDxab3qevbUTJ X-Proofpoint-ORIG-GUID: 5VWCVD7XwZOZhHEz5435zFNmsck4Wfjs X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-04-19_10:2021-04-19,2021-04-19 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 mlxlogscore=999 spamscore=0 impostorscore=0 malwarescore=0 bulkscore=0 clxscore=1015 phishscore=0 mlxscore=0 priorityscore=1501 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104060000 definitions=main-2104190100 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org The error checking in add_dir_hash was wrong. EVP_DigestUpdate returns 1 on success and 0 on error, so we cannot just accumulate it using or'ing. >From the man page: EVP_DigestInit_ex(), EVP_DigestUpdate(), EVP_DigestFinal_ex() Returns 1 for success and 0 for failure. Signed-off-by: Stefan Berger --- src/libimaevm.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/src/libimaevm.c b/src/libimaevm.c index fa6c278..d8fc0d4 100644 --- a/src/libimaevm.c +++ b/src/libimaevm.c @@ -179,7 +179,6 @@ out: static int add_dir_hash(const char *file, EVP_MD_CTX *ctx) { - int err; struct dirent *de; DIR *dir; unsigned long long ino, off; @@ -198,11 +197,10 @@ static int add_dir_hash(const char *file, EVP_MD_CTX *ctx) type = de->d_type; log_debug("entry: %s, ino: %llu, type: %u, off: %llu, reclen: %hu\n", de->d_name, ino, type, off, de->d_reclen); - err = EVP_DigestUpdate(ctx, de->d_name, strlen(de->d_name)); - /*err |= EVP_DigestUpdate(ctx, &off, sizeof(off));*/ - err |= EVP_DigestUpdate(ctx, &ino, sizeof(ino)); - err |= EVP_DigestUpdate(ctx, &type, sizeof(type)); - if (!err) { + if (EVP_DigestUpdate(ctx, de->d_name, strlen(de->d_name)) != 1 || + /* EVP_DigestUpdate(ctx, &off, sizeof(off)) != 1 || */ + EVP_DigestUpdate(ctx, &ino, sizeof(ino)) != 1|| + EVP_DigestUpdate(ctx, &type, sizeof(type)) != 1) { log_err("EVP_DigestUpdate() failed\n"); output_openssl_errors(); result = 1; -- 2.30.2