From patchwork Fri Aug 31 16:36:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liam Merwick X-Patchwork-Id: 10584187 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ABB30139B for ; Fri, 31 Aug 2018 16:37:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9B0F72C279 for ; Fri, 31 Aug 2018 16:37:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8EA122C288; Fri, 31 Aug 2018 16:37:03 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2B2712C279 for ; Fri, 31 Aug 2018 16:37:03 +0000 (UTC) Received: from localhost ([::1]:54987 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fvmPu-000299-6h for patchwork-qemu-devel@patchwork.kernel.org; Fri, 31 Aug 2018 12:37:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40770) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fvmOO-0000zf-Kq for qemu-devel@nongnu.org; Fri, 31 Aug 2018 12:35:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fvmOH-00057y-Cp for qemu-devel@nongnu.org; Fri, 31 Aug 2018 12:35:27 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:39692) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fvmOE-00052P-Od for qemu-devel@nongnu.org; Fri, 31 Aug 2018 12:35:20 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w7VGYB9m139858 for ; Fri, 31 Aug 2018 16:35:13 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : subject : date : message-id : in-reply-to : references; s=corp-2018-07-02; bh=8w2AxTHB+fHC+0PWWlPdQYopf7Bh5uZTSazLvQYYUMw=; b=ZG+i+gMiFxs2TEIpsMRP0JZanlPvlZI4pItznJS3Y3sM/q5ueI3HdqaNmRUl79EAjlna ZFzVoge/TBl9JzfJmJq9nyrt2gw0EQCNqjisJjd7S6qj7W14bJAvlHJiUJ4RAU4yPXq6 TArQACYVyH9/R2coq1b51nw3VvGGGIKlxfhdOfVoK81ggntllSAQeQGULifobVqV4uLh Kg4wN8DCQGdf5Xo0vQzwPpFOroQZvGdzQXmC2eydaIEG/g/fjvgbgL2plv9GioBBD8FO 8BUTGrf3nTXKDeH1pBOYYhKxzAKH3nxXhaVn6OrNHg/BmhQ52UwGFMVfXifgdjHJCSkX Yw== Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp2120.oracle.com with ESMTP id 2m2yrqvb8r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 31 Aug 2018 16:35:13 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w7VGZBYa019886 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 31 Aug 2018 16:35:12 GMT Received: from abhmp0001.oracle.com (abhmp0001.oracle.com [141.146.116.7]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w7VGZBn0016215 for ; Fri, 31 Aug 2018 16:35:11 GMT Received: from ol7.nl.oracle.com (/10.175.61.138) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 31 Aug 2018 09:35:10 -0700 From: Liam Merwick To: qemu-devel@nongnu.org Date: Fri, 31 Aug 2018 17:36:48 +0100 Message-Id: <1535733414-6812-3-git-send-email-Liam.Merwick@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1535733414-6812-1-git-send-email-Liam.Merwick@oracle.com> References: <1535733414-6812-1-git-send-email-Liam.Merwick@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9001 signatures=668708 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=854 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808310170 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 156.151.31.85 Subject: [Qemu-devel] [PATCH v2 2/8] job: Fix off-by-one assert checks for JobSTT and JobVerbTable X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP In the assert checking the array dereference of JobVerbTable[verb] in job_apply_verb() the check of the index, verb, allows an overrun because an index equal to the array size is permitted. Similarly, in the assert check of JobSTT[s0][s1] with index s1 in job_state_transition(), an off-by-one overrun is not flagged either. This is not a run-time issue as there are no callers actually passing in the max value. Signed-off-by: Liam Merwick Reviewed-by: Darren Kenny Reviewed-by: Mark Kanda Reviewed-by: Eric Blake --- job.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/job.c b/job.c index e36ebaafd81c..40320566f43b 100644 --- a/job.c +++ b/job.c @@ -166,7 +166,7 @@ bool job_is_internal(Job *job) static void job_state_transition(Job *job, JobStatus s1) { JobStatus s0 = job->status; - assert(s1 >= 0 && s1 <= JOB_STATUS__MAX); + assert(s1 >= 0 && s1 < JOB_STATUS__MAX); trace_job_state_transition(job, job->ret, JobSTT[s0][s1] ? "allowed" : "disallowed", JobStatus_str(s0), JobStatus_str(s1)); @@ -181,7 +181,7 @@ static void job_state_transition(Job *job, JobStatus s1) int job_apply_verb(Job *job, JobVerb verb, Error **errp) { JobStatus s0 = job->status; - assert(verb >= 0 && verb <= JOB_VERB__MAX); + assert(verb >= 0 && verb < JOB_VERB__MAX); trace_job_apply_verb(job, JobStatus_str(s0), JobVerb_str(verb), JobVerbTable[verb][s0] ? "allowed" : "prohibited"); if (JobVerbTable[verb][s0]) {