From patchwork Wed Jul 26 06:34:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: dinglimin X-Patchwork-Id: 1812977 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4R9khD13dKz1ybX for ; Wed, 26 Jul 2023 16:36:43 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qOY7s-0006O3-2k; Wed, 26 Jul 2023 02:36:00 -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 1qOY7l-0006Nr-IQ for qemu-devel@nongnu.org; Wed, 26 Jul 2023 02:35:53 -0400 Received: from cmccmta6.chinamobile.com ([111.22.67.139] helo=cmccmta1.chinamobile.com) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qOY7f-0004Pz-5N for qemu-devel@nongnu.org; Wed, 26 Jul 2023 02:35:50 -0400 X-RM-TagInfo: emlType=0 X-RM-SPAM-FLAG: 00000000 Received: from spf.mail.chinamobile.com (unknown[10.188.0.87]) by rmmx-syy-dmz-app01-12001 (RichMail) with SMTP id 2ee164c0bebb9a7-1ea80; Wed, 26 Jul 2023 14:35:39 +0800 (CST) X-RM-TRANSID: 2ee164c0bebb9a7-1ea80 X-RM-TagInfo: emlType=0 X-RM-SPAM-FLAG: 00000000 Received: from localhost.localdomain (unknown[223.108.79.99]) by rmsmtp-syy-appsvr08-12008 (RichMail) with SMTP id 2ee864c0beb9697-63a1b; Wed, 26 Jul 2023 14:35:39 +0800 (CST) X-RM-TRANSID: 2ee864c0beb9697-63a1b From: dinglimin To: imp@bsdimp.com, richard.henderson@linaro.org Cc: qemu-devel@nongnu.org, dinglimin Subject: [PATCH] os-sys.c:do_freebsd_sysctl The unuser_lock for hnewp and hnamep is missing Date: Wed, 26 Jul 2023 14:34:54 +0800 Message-Id: <20230726063454.247-1-dinglimin@cmss.chinamobile.com> X-Mailer: git-send-email 2.30.0.windows.2 MIME-Version: 1.0 Received-SPF: pass client-ip=111.22.67.139; envelope-from=dinglimin@cmss.chinamobile.com; helo=cmccmta1.chinamobile.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org If holdp returns NULL, you need to execute unuser_lock on hnewp and hnamep when exiting the function Signed-off-by: dinglimin --- bsd-user/freebsd/os-sys.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/bsd-user/freebsd/os-sys.c b/bsd-user/freebsd/os-sys.c index df31706558..3918ddf1ed 100644 --- a/bsd-user/freebsd/os-sys.c +++ b/bsd-user/freebsd/os-sys.c @@ -585,9 +585,10 @@ abi_long do_freebsd_sysctl(CPUArchState *env, abi_ulong namep, int32_t namelen, if (oldlenp && (ret == 0 || ret == -TARGET_ENOMEM)) { put_user_ual(holdlen, oldlenp); } - unlock_user(hnamep, namep, 0); unlock_user(holdp, oldp, ret == 0 ? holdlen : 0); out: + unlock_user(hnamep, namep, 0); + unlock_user(hnewp, newp, 0); g_free(snamep); return ret; }