From nobody Wed Feb 11 08:25:47 2026 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 177072615295069.77927894644802; Tue, 10 Feb 2026 04:22:32 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vpmk5-0004M1-VR; Tue, 10 Feb 2026 07:21:22 -0500 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 1vpmii-0000Vd-71; Tue, 10 Feb 2026 07:19:56 -0500 Received: from isrv.corpit.ru ([212.248.84.144]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vpmig-0001qL-5w; Tue, 10 Feb 2026 07:19:55 -0500 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id F2222187DE3; Tue, 10 Feb 2026 15:16:17 +0300 (MSK) Received: from think4mjt.tls.msk.ru (mjtthink.wg.tls.msk.ru [192.168.177.146]) by tsrv.corpit.ru (Postfix) with ESMTP id 8F34C360CF7; Tue, 10 Feb 2026 15:17:13 +0300 (MSK) From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, zhenwei pi , =?UTF-8?q?=EC=9D=B4=EC=9E=AC=EC=98=81?= , zhenwei pi , "Michael S. Tsirkin" , Michael Tokarev Subject: [Stable-10.0.8 79/85] hw/virtio/virtio-crypto: verify asym request size Date: Tue, 10 Feb 2026 15:16:43 +0300 Message-ID: <20260210121657.69363-10-mjt@tls.msk.ru> X-Mailer: git-send-email 2.47.3 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=212.248.84.144; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru 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, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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: qemu development 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: 1770726153595154100 From: zhenwei pi The total lenght of request is limited by cryptodev config, verify it to avoid unexpected request from guest. Fixes: CVE-2025-14876 Fixes: 0e660a6f90a ("crypto: Introduce RSA algorithm") Reported-by: =EC=9D=B4=EC=9E=AC=EC=98=81 Signed-off-by: zhenwei pi Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Message-Id: <20251221024321.143196-2-zhenwei.pi@linux.dev> (cherry picked from commit 91c6438caffc880e999a7312825479685d659b44) Signed-off-by: Michael Tokarev diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c index a1b3c90618..3a3de080a4 100644 --- a/hw/virtio/virtio-crypto.c +++ b/hw/virtio/virtio-crypto.c @@ -767,11 +767,18 @@ virtio_crypto_handle_asym_req(VirtIOCrypto *vcrypto, uint32_t len; uint8_t *src =3D NULL; uint8_t *dst =3D NULL; + uint64_t max_len; =20 asym_op_info =3D g_new0(CryptoDevBackendAsymOpInfo, 1); src_len =3D ldl_le_p(&req->para.src_data_len); dst_len =3D ldl_le_p(&req->para.dst_data_len); =20 + max_len =3D (uint64_t)src_len + dst_len; + if (unlikely(max_len > vcrypto->conf.max_size)) { + virtio_error(vdev, "virtio-crypto asym request is too large"); + goto err; + } + if (src_len > 0) { src =3D g_malloc0(src_len); len =3D iov_to_buf(iov, out_num, 0, src, src_len); --=20 2.47.3