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=-6.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 0DB7FC54FCB for ; Wed, 22 Apr 2020 13:21:12 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C5D08206EC for ; Wed, 22 Apr 2020 13:21:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="dOMOPRY1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C5D08206EC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:50468 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jRFJO-0006BQ-Um for qemu-devel@archiver.kernel.org; Wed, 22 Apr 2020 09:21:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47098) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jRF6K-00043W-UZ for qemu-devel@nongnu.org; Wed, 22 Apr 2020 09:07:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jRF65-0003jb-RA for qemu-devel@nongnu.org; Wed, 22 Apr 2020 09:07:40 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:55916 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jRF65-0003fz-DQ for qemu-devel@nongnu.org; Wed, 22 Apr 2020 09:07:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1587560844; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VfYN+TU+3RtiZ4Pa1zd3jj/XHqO17tt2OP3Q91CNoWs=; b=dOMOPRY1yVJRYlS9L3MbuGev7n9s5dTHXYfMefXXut/Juq7u3YZs8FCTcvPd1FSZTs9O9n OvI8ALHkE4hIEkVnQZH4BOOPLyUQZwpSPnp4vUULHvxjQfOqyi19bEvnONpMcDcMMQ2xk+ sCwFo5FGd5AM5LZR9ghcya+WSfrnlTg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-234-MBZJOojGPgqV0JcqchcQGg-1; Wed, 22 Apr 2020 09:07:22 -0400 X-MC-Unique: MBZJOojGPgqV0JcqchcQGg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CB2521084431 for ; Wed, 22 Apr 2020 13:07:21 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-113-6.ams2.redhat.com [10.36.113.6]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 97AFD60C99; Wed, 22 Apr 2020 13:07:21 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 0ADCF11358C0; Wed, 22 Apr 2020 15:07:20 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PATCH v2 04/14] cpus: Proper range-checking for -icount shift=N Date: Wed, 22 Apr 2020 15:07:09 +0200 Message-Id: <20200422130719.28225-5-armbru@redhat.com> In-Reply-To: <20200422130719.28225-1-armbru@redhat.com> References: <20200422130719.28225-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=205.139.110.61; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/22 02:57:52 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.61 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" timers_state.icount_time_shift must be in [0,63] to avoid undefined behavior when shifting by it, e.g. in cpu_icount_to_ns(). icount_adjust() clamps it to [0,MAX_ICOUNT_SHIFT], with MAX_ICOUNT_SHIFT =3D 10. configure_icount() doesn't. Fix that. Fixes: a8bfac37085c3372366d722f131a7e18d664ee4d Cc: Paolo Bonzini Signed-off-by: Markus Armbruster --- cpus.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/cpus.c b/cpus.c index 1b542b37f9..5670c96bcf 100644 --- a/cpus.c +++ b/cpus.c @@ -25,6 +25,7 @@ #include "qemu/osdep.h" #include "qemu-common.h" #include "qemu/config-file.h" +#include "qemu/cutils.h" #include "migration/vmstate.h" #include "monitor/monitor.h" #include "qapi/error.h" @@ -801,7 +802,6 @@ void configure_icount(QemuOpts *opts, Error **errp) bool sleep =3D qemu_opt_get_bool(opts, "sleep", true); bool align =3D qemu_opt_get_bool(opts, "align", false); long time_shift =3D -1; - char *rem_str =3D NULL; =20 if (!option && qemu_opt_get(opts, "align")) { error_setg(errp, "Please specify shift option when using align"); @@ -814,9 +814,8 @@ void configure_icount(QemuOpts *opts, Error **errp) } =20 if (strcmp(option, "auto") !=3D 0) { - errno =3D 0; - time_shift =3D strtol(option, &rem_str, 0); - if (errno !=3D 0 || *rem_str !=3D '\0' || !strlen(option)) { + if (qemu_strtol(option, NULL, 0, &time_shift) < 0 + || time_shift < 0 || time_shift > MAX_ICOUNT_SHIFT) { error_setg(errp, "icount: Invalid shift value"); return; } --=20 2.21.1