From nobody Sun Nov 24 00:38:02 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 1728328694055103.45603154163507; Mon, 7 Oct 2024 12:18:14 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sxtEW-0004lB-62; Mon, 07 Oct 2024 15:17:28 -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 1sxtEI-0004PN-EO; Mon, 07 Oct 2024 15:17:14 -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 1sxtEG-00045I-Of; Mon, 07 Oct 2024 15:17:14 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 8835F96245; Mon, 7 Oct 2024 22:16:48 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id 5A98D14F726; Mon, 7 Oct 2024 22:16:55 +0300 (MSK) Received: (nullmailer pid 2592728 invoked by uid 1000); Mon, 07 Oct 2024 19:16:54 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, =?UTF-8?q?Volker=20R=C3=BCmelin?= , "Michael S . Tsirkin" , Michael Tokarev Subject: [Stable-9.1.1 09/32] hw/audio/virtio-sound: fix heap buffer overflow Date: Mon, 7 Oct 2024 22:16:26 +0300 Message-Id: <20241007191654.2592616-9-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.5 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, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_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: 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: 1728328694384116600 From: Volker R=C3=BCmelin Currently, the guest may write to the device configuration space, whereas the virtio sound device specification in chapter 5.14.4 clearly states that the fields in the device configuration space are driver-read-only. Remove the set_config function from the virtio_snd class. This also prevents a heap buffer overflow. See QEMU issue #2296. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2296 Signed-off-by: Volker R=C3=BCmelin Message-Id: <20240901130112.8242-1-vr_qemu@t-online.de> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit 7fc6611cad3e9627b23ce83e550b668abba6c886) Signed-off-by: Michael Tokarev diff --git a/hw/audio/trace-events b/hw/audio/trace-events index b1870ff224..b8ef572767 100644 --- a/hw/audio/trace-events +++ b/hw/audio/trace-events @@ -41,7 +41,6 @@ asc_update_irq(int irq, int a, int b) "set IRQ to %d (A: = 0x%x B: 0x%x)" =20 #virtio-snd.c virtio_snd_get_config(void *vdev, uint32_t jacks, uint32_t streams, uint32= _t chmaps) "snd %p: get_config jacks=3D%"PRIu32" streams=3D%"PRIu32" chmaps= =3D%"PRIu32"" -virtio_snd_set_config(void *vdev, uint32_t jacks, uint32_t new_jacks, uint= 32_t streams, uint32_t new_streams, uint32_t chmaps, uint32_t new_chmaps) "= snd %p: set_config jacks from %"PRIu32"->%"PRIu32", streams from %"PRIu32"-= >%"PRIu32", chmaps from %"PRIu32"->%"PRIu32 virtio_snd_get_features(void *vdev, uint64_t features) "snd %p: get_featur= es 0x%"PRIx64 virtio_snd_vm_state_running(void) "vm state running" virtio_snd_vm_state_stopped(void) "vm state stopped" diff --git a/hw/audio/virtio-snd.c b/hw/audio/virtio-snd.c index d1cf5eb445..69838181dd 100644 --- a/hw/audio/virtio-snd.c +++ b/hw/audio/virtio-snd.c @@ -107,29 +107,6 @@ virtio_snd_get_config(VirtIODevice *vdev, uint8_t *con= fig) =20 } =20 -static void -virtio_snd_set_config(VirtIODevice *vdev, const uint8_t *config) -{ - VirtIOSound *s =3D VIRTIO_SND(vdev); - const virtio_snd_config *sndconfig =3D - (const virtio_snd_config *)config; - - - trace_virtio_snd_set_config(vdev, - s->snd_conf.jacks, - sndconfig->jacks, - s->snd_conf.streams, - sndconfig->streams, - s->snd_conf.chmaps, - sndconfig->chmaps); - - memcpy(&s->snd_conf, sndconfig, sizeof(virtio_snd_config)); - le32_to_cpus(&s->snd_conf.jacks); - le32_to_cpus(&s->snd_conf.streams); - le32_to_cpus(&s->snd_conf.chmaps); - -} - static void virtio_snd_pcm_buffer_free(VirtIOSoundPCMBuffer *buffer) { @@ -1400,7 +1377,6 @@ static void virtio_snd_class_init(ObjectClass *klass,= void *data) vdc->realize =3D virtio_snd_realize; vdc->unrealize =3D virtio_snd_unrealize; vdc->get_config =3D virtio_snd_get_config; - vdc->set_config =3D virtio_snd_set_config; vdc->get_features =3D get_features; vdc->reset =3D virtio_snd_reset; vdc->legacy_features =3D 0; --=20 2.39.5