From nobody Sun Nov 24 07:29:00 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 172560590656497.2882983967819; Thu, 5 Sep 2024 23:58:26 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1smSss-0000M8-QY; Fri, 06 Sep 2024 02:55:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1smSsn-0008FM-Hn; Fri, 06 Sep 2024 02:55:50 -0400 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1smSsl-0003Hk-1D; Fri, 06 Sep 2024 02:55:48 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 8E57F8C244; Fri, 6 Sep 2024 09:53:12 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id 569901333FC; Fri, 6 Sep 2024 09:54:30 +0300 (MSK) Received: (nullmailer pid 43414 invoked by uid 1000); Fri, 06 Sep 2024 06:54:29 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Peter Maydell , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Stefan Hajnoczi , Michael Tokarev Subject: [Stable-8.2.7 15/53] util/async.c: Forbid negative min/max in aio_context_set_thread_pool_params() Date: Fri, 6 Sep 2024 09:53:45 +0300 Message-Id: <20240906065429.42415-15-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1725605907799116600 From: Peter Maydell aio_context_set_thread_pool_params() takes two int64_t arguments to set the minimum and maximum number of threads in the pool. We do some bounds checking on these, but we don't catch the case where the inputs are negative. This means that later in the function when we assign these inputs to the AioContext::thread_pool_min and ::thread_pool_max fields, which are of type int, the values might overflow the smaller type. A negative number of threads is meaningless, so make aio_context_set_thread_pool_params() return an error if either min or max are negative. Resolves: Coverity CID 1547605 Signed-off-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daud=C3=A9 Message-id: 20240723150927.1396456-1-peter.maydell@linaro.org Signed-off-by: Stefan Hajnoczi (cherry picked from commit 851495571d14fe2226c52b9d423f88a4f5460836) Signed-off-by: Michael Tokarev diff --git a/util/async.c b/util/async.c index 8f90ddc304..86d2910481 100644 --- a/util/async.c +++ b/util/async.c @@ -758,7 +758,7 @@ void aio_context_set_thread_pool_params(AioContext *ctx= , int64_t min, int64_t max, Error **errp) { =20 - if (min > max || !max || min > INT_MAX || max > INT_MAX) { + if (min > max || max <=3D 0 || min < 0 || min > INT_MAX || max > INT_M= AX) { error_setg(errp, "bad thread-pool-min/thread-pool-max values"); return; } --=20 2.39.2