From nobody Sat May 18 04:13:33 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 1711874965327149.7242170659689; Sun, 31 Mar 2024 01:49:25 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rqqrj-0003eg-6Q; Sun, 31 Mar 2024 04:48:35 -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 1rqqrh-0003eO-1w for qemu-devel@nongnu.org; Sun, 31 Mar 2024 04:48:33 -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 1rqqrf-0007kB-00 for qemu-devel@nongnu.org; Sun, 31 Mar 2024 04:48:32 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id D93A65A7F3; Sun, 31 Mar 2024 11:50:05 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id C3DD3A7ABD; Sun, 31 Mar 2024 11:48:26 +0300 (MSK) Received: (nullmailer pid 2716847 invoked by uid 1000); Sun, 31 Mar 2024 08:48:26 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: YunQiang Su , Laurent Vivier , Michael Tokarev Subject: [PATCH] linux-user/syscall.c: fix setsockopt(SOL_ALG, ALG_SET_KEY) Date: Sun, 31 Mar 2024 11:48:25 +0300 Message-Id: <20240331084825.2716833-1-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 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 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: 1711874965826100001 Content-Type: text/plain; charset="utf-8" This setsockopt accepts zero-lengh optlen (current qemu implementation does not allow this). Also, there's no need to make a copy of the key, it is enough to use lock_user() (which accepts zero-length length already). Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2197 Fixes: f31dddd2fc "linux-user: Add support for setsockopt() option SOL_ALG" Signed-off-by: Michael Tokarev diff --git a/linux-user/syscall.c b/linux-user/syscall.c index e12d969c2e..5c7728cfd4 100644 Reviewed-by: Richard Henderson --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -2277,18 +2277,13 @@ static abi_long do_setsockopt(int sockfd, int level= , int optname, switch (optname) { case ALG_SET_KEY: { - char *alg_key =3D g_malloc(optlen); - + char *alg_key =3D lock_user(VERIFY_READ, optval_addr, optlen, = 1); if (!alg_key) { - return -TARGET_ENOMEM; - } - if (copy_from_user(alg_key, optval_addr, optlen)) { - g_free(alg_key); return -TARGET_EFAULT; } ret =3D get_errno(setsockopt(sockfd, level, optname, alg_key, optlen)); - g_free(alg_key); + unlock_user(alg_key, optval_addr, optlen); break; } case ALG_SET_AEAD_AUTHSIZE: --=20 2.39.2