From nobody Fri May 17 09:21:08 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1712258078; cv=none; d=zohomail.com; s=zohoarc; b=e9w/lN99qRNWOgY1DZg3W80ma/sw8I6b/NCpcXm+6pBTMCZ24gZjaKHnDklJReUXYa+UAN5CtpdY2bR1znWYE/fvvMDVSdZFoQ/zmsQt5rG0BslC+Aa1ncUwuk5EeX9NneJRABnHehfushlYj4UVMNYSD7urUZhy7Av86dASWTM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1712258078; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=bvdlQf7pHfui8YenaIyIB+vGNyHogH/cKFxc4FINeZE=; b=IwGGXn+jqOyJ7eApCoLDJkNCQM7tTsJtxHQw5780xB/CHVd9xlM0xvnQ6oL2fG1POzClB3jMoslVhtT7TcnQqmj3PNO8MoK8h2pHN2JTFN4u7K64z0JotvXfIxUAIvQMeuz5VPK2/zrQlCRBlS7IIRNd33xazz2ZG5NDi3rG4gk= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1712258078120990.4224959234563; Thu, 4 Apr 2024 12:14:38 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rsSX9-00063Z-Lm; Thu, 04 Apr 2024 15:13:59 -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 1rsSX8-00063Q-8z for qemu-devel@nongnu.org; Thu, 04 Apr 2024 15:13:58 -0400 Received: from mail-ej1-x635.google.com ([2a00:1450:4864:20::635]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rsSX0-0005Vd-BC for qemu-devel@nongnu.org; Thu, 04 Apr 2024 15:13:56 -0400 Received: by mail-ej1-x635.google.com with SMTP id a640c23a62f3a-a4e60a64abcso432933266b.1 for ; Thu, 04 Apr 2024 12:13:49 -0700 (PDT) Received: from m1x-phil.lan ([176.187.216.111]) by smtp.gmail.com with ESMTPSA id bu8-20020a170907930800b00a4e451724ffsm7302786ejc.166.2024.04.04.12.13.46 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 04 Apr 2024 12:13:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1712258028; x=1712862828; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=bvdlQf7pHfui8YenaIyIB+vGNyHogH/cKFxc4FINeZE=; b=M0cAWhJTFpiVlffZ/nFFvGuzM/ygkEABDYooHYY0Jum7VIJ9TlF/TE8e+HuM9eG3F9 8q0YjPI1iQfFOHBum8MB/H5X066Jems9A/XGoCsOj9DGWHIYKB65scHuvV32hlxzEaBH mlc3amRoFprS3XB+mxmS3Hrcv7E3gLHL7/Usw7SGg/QwAE8Z3iKRRGL+egc4quEeIEdE iqNUxPZ1TUjoQ4cziIPUd43mEhQytP2nI33z4VtgWhE+oNxCjY5L7g+C0nSEtrT4OiFB AYCL0wByeql+1kU1CuXLHgOdwqZLnVQx1+vVko5PxjduF2N7SsOzx/RYjsdQf1qsigTL uHug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712258028; x=1712862828; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=bvdlQf7pHfui8YenaIyIB+vGNyHogH/cKFxc4FINeZE=; b=FW5cUj4X8Qc7VuJgC9iOJCE6Jgr6CMdSs0ihk5CRg1flrj73OR/Y2eC1/3NevI0udc DiTZHJ0SAmgJSPVV83QKCJTPgQ1UGdXJ1yV24nA4bolk8pLzmKxKpxmZ7LUB04VeMuQI 0k16DssEfgeio7KDmFyV0+NM0P8iG+Dna1+/4PqCjZG/rfZVdIihtchEF0pu6Ntmzhpu gDD2TMyp3aGO4vX+YhtmTa4ZgktAva0AHEt5XMVhOGZQWVKDkr34hWFq06OKqToSGo34 6s5AhLO35fmAR+yOGWbinvW96FQq6Dc6R9zjBsnBEnvytouX24SYhu0YuziGayENQLls XMdg== X-Gm-Message-State: AOJu0YyGJ5ZKaci4zZT2H1Ah2Ks3GRy/F8KLwOy0PwdPqJO2MsJa/F3g Q57ZC/teWNGEiLocc/qxI/+9EWkFQqvJpSLP8+mTB+EtKV2rl52La+DcskQCnfOchs0AIJP5UFl P X-Google-Smtp-Source: AGHT+IF9j3SKcg2Ny+e4pt79HnzSaY5+vwV7V8cQ3SuQKblL9sunzEpYk9wiW1rk/veHVSxmRHFgbg== X-Received: by 2002:a17:906:ae8e:b0:a51:931a:f82c with SMTP id md14-20020a170906ae8e00b00a51931af82cmr292258ejb.32.1712258028223; Thu, 04 Apr 2024 12:13:48 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Gerd Hoffmann , Amit Shah , "Michael S. Tsirkin" , Alexander Bulekov , "Gonglei (Arei)" , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Laurent Vivier , Mauro Matteo Cascella , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH-for-9.0 1/4] hw/virtio: Introduce virtio_bh_new_guarded() helper Date: Thu, 4 Apr 2024 21:13:36 +0200 Message-ID: <20240404191339.5688-2-philmd@linaro.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240404191339.5688-1-philmd@linaro.org> References: <20240404191339.5688-1-philmd@linaro.org> 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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::635; envelope-from=philmd@linaro.org; helo=mail-ej1-x635.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1712258079541100007 Introduce virtio_bh_new_guarded(), similar to qemu_bh_new_guarded() but using the transport memory guard, instead of the device one (there can only be one virtio device per virtio bus). Inspired-by: Gerd Hoffmann Signed-off-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Gerd Hoffmann --- include/hw/virtio/virtio.h | 7 +++++++ hw/virtio/virtio.c | 10 ++++++++++ 2 files changed, 17 insertions(+) diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index b3c74a1bca..12419d6355 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -22,6 +22,7 @@ #include "standard-headers/linux/virtio_config.h" #include "standard-headers/linux/virtio_ring.h" #include "qom/object.h" +#include "block/aio.h" =20 /* * A guest should never accept this. It implies negotiation is broken @@ -527,4 +528,10 @@ static inline bool virtio_device_disabled(VirtIODevice= *vdev) bool virtio_legacy_allowed(VirtIODevice *vdev); bool virtio_legacy_check_disabled(VirtIODevice *vdev); =20 +QEMUBH *virtio_bh_new_guarded_full(VirtIODevice *vdev, + QEMUBHFunc *cb, void *opaque, + const char *name); +#define virtio_bh_new_guarded(vdev, cb, opaque) \ + virtio_bh_new_guarded_full((vdev), (cb), (opaque), (stringify(cb))) + #endif diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index fb6b4ccd83..e1735cf7fd 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -4176,3 +4176,13 @@ static void virtio_register_types(void) } =20 type_init(virtio_register_types) + +QEMUBH *virtio_bh_new_guarded_full(VirtIODevice *vdev, + QEMUBHFunc *cb, void *opaque, + const char *name) +{ + BusState *virtio_bus =3D qdev_get_parent_bus(DEVICE(vdev)); + DeviceState *transport =3D virtio_bus->parent; + + return qemu_bh_new_full(cb, opaque, name, &transport->mem_reentrancy_g= uard); +} --=20 2.41.0 From nobody Fri May 17 09:21:08 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1712258078; cv=none; d=zohomail.com; s=zohoarc; b=l7661K2Sh+Sg9rzQTVvIo0pQJl5ox2K4VWa/njK20PjozNY6dinqlNAO2OiMbOJQtQLNGk8nSSOsQbcCXDAjkjE6vpKbtq+Es+SqsVSmBU1A85QX8wIBFaMzgjcoC5y2cdSWexzJjYbAlGXOBq6f/xcqNN8lzYjGRWalQiF+bb8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1712258078; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=QHbMdOAODgINQwjAjZnCEp30C4hPyCgHI0kFqKRWwYo=; b=FnZA4Se6vkPDccz9pzygJiJ2KbP8VZD6WjDCVOROyC7MtpZCTXPr6yOY5wPHi9hcSUd7DuwIHs6+/OgX1q/Wpx0JI7yA0T5DCrq0GxSgjwmZqRetOaq9NG++IU9rJUlQnBiuLif1tbRDkuBwFKg8o2zb56WzHliWCOi8drV4QcM= ARC-Authentication-Results: i=1; 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Thu, 04 Apr 2024 12:13:54 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Gerd Hoffmann , Amit Shah , "Michael S. Tsirkin" , Alexander Bulekov , "Gonglei (Arei)" , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Laurent Vivier , Mauro Matteo Cascella , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-stable@nongnu.org, Yongkang Jia , Xiao Lei , Yiming Tao Subject: [PATCH-for-9.0 2/4] hw/display/virtio-gpu: Protect from DMA re-entrancy bugs Date: Thu, 4 Apr 2024 21:13:37 +0200 Message-ID: <20240404191339.5688-3-philmd@linaro.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240404191339.5688-1-philmd@linaro.org> References: <20240404191339.5688-1-philmd@linaro.org> 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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::530; envelope-from=philmd@linaro.org; helo=mail-ed1-x530.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1712258079562100008 Replace qemu_bh_new_guarded() by virtio_bh_new_guarded() so the bus and device use the same guard. Otherwise the DMA-reentrancy protection can be bypassed: $ cat << EOF | qemu-system-i386 -display none -nodefaults \ -machine q35,accel=3Dqtest \ -m 512M \ -device virtio-gpu \ -qtest stdio outl 0xcf8 0x80000820 outl 0xcfc 0xe0004000 outl 0xcf8 0x80000804 outw 0xcfc 0x06 write 0xe0004030 0x4 0x024000e0 write 0xe0004028 0x1 0xff write 0xe0004020 0x4 0x00009300 write 0xe000401c 0x1 0x01 write 0x101 0x1 0x04 write 0x103 0x1 0x1c write 0x9301c8 0x1 0x18 write 0x105 0x1 0x1c write 0x107 0x1 0x1c write 0x109 0x1 0x1c write 0x10b 0x1 0x00 write 0x10d 0x1 0x00 write 0x10f 0x1 0x00 write 0x111 0x1 0x00 write 0x113 0x1 0x00 write 0x115 0x1 0x00 write 0x117 0x1 0x00 write 0x119 0x1 0x00 write 0x11b 0x1 0x00 write 0x11d 0x1 0x00 write 0x11f 0x1 0x00 write 0x121 0x1 0x00 write 0x123 0x1 0x00 write 0x125 0x1 0x00 write 0x127 0x1 0x00 write 0x129 0x1 0x00 write 0x12b 0x1 0x00 write 0x12d 0x1 0x00 write 0x12f 0x1 0x00 write 0x131 0x1 0x00 write 0x133 0x1 0x00 write 0x135 0x1 0x00 write 0x137 0x1 0x00 write 0x139 0x1 0x00 write 0xe0007003 0x1 0x00 EOF ... =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D276099=3D=3DERROR: AddressSanitizer: heap-use-after-free on address= 0x60d000011178 at pc 0x562cc3b736c7 bp 0x7ffed49dee60 sp 0x7ffed49dee58 READ of size 8 at 0x60d000011178 thread T0 #0 0x562cc3b736c6 in virtio_gpu_ctrl_response hw/display/virtio-gpu.c= :180:42 #1 0x562cc3b7c40b in virtio_gpu_ctrl_response_nodata hw/display/virti= o-gpu.c:192:5 #2 0x562cc3b7c40b in virtio_gpu_simple_process_cmd hw/display/virtio-= gpu.c:1015:13 #3 0x562cc3b82873 in virtio_gpu_process_cmdq hw/display/virtio-gpu.c:= 1050:9 #4 0x562cc4a85514 in aio_bh_call util/async.c:169:5 #5 0x562cc4a85c52 in aio_bh_poll util/async.c:216:13 #6 0x562cc4a1a79b in aio_dispatch util/aio-posix.c:423:5 #7 0x562cc4a8a2da in aio_ctx_dispatch util/async.c:358:5 #8 0x7f36840547a8 in g_main_context_dispatch (/lib/x86_64-linux-gnu/l= ibglib-2.0.so.0+0x547a8) #9 0x562cc4a8b753 in glib_pollfds_poll util/main-loop.c:290:9 #10 0x562cc4a8b753 in os_host_main_loop_wait util/main-loop.c:313:5 #11 0x562cc4a8b753 in main_loop_wait util/main-loop.c:592:11 #12 0x562cc3938186 in qemu_main_loop system/runstate.c:782:9 #13 0x562cc43b7af5 in qemu_default_main system/main.c:37:14 #14 0x7f3683a6c189 in __libc_start_call_main csu/../sysdeps/nptl/libc= _start_call_main.h:58:16 #15 0x7f3683a6c244 in __libc_start_main csu/../csu/libc-start.c:381:3 #16 0x562cc2a58ac0 in _start (qemu-system-i386+0x231bac0) 0x60d000011178 is located 56 bytes inside of 136-byte region [0x60d000011= 140,0x60d0000111c8) freed by thread T0 here: #0 0x562cc2adb662 in __interceptor_free (qemu-system-i386+0x239e662) #1 0x562cc3b86b21 in virtio_gpu_reset hw/display/virtio-gpu.c:1524:9 #2 0x562cc416e20e in virtio_reset hw/virtio/virtio.c:2145:9 #3 0x562cc37c5644 in virtio_pci_reset hw/virtio/virtio-pci.c:2249:5 #4 0x562cc4233758 in memory_region_write_accessor system/memory.c:497= :5 #5 0x562cc4232eea in access_with_adjusted_size system/memory.c:573:18 previously allocated by thread T0 here: #0 0x562cc2adb90e in malloc (qemu-system-i386+0x239e90e) #1 0x7f368405a678 in g_malloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0= +0x5a678) #2 0x562cc4163ffc in virtqueue_split_pop hw/virtio/virtio.c:1612:12 #3 0x562cc4163ffc in virtqueue_pop hw/virtio/virtio.c:1783:16 #4 0x562cc3b91a95 in virtio_gpu_handle_ctrl hw/display/virtio-gpu.c:1= 112:15 #5 0x562cc4a85514 in aio_bh_call util/async.c:169:5 #6 0x562cc4a85c52 in aio_bh_poll util/async.c:216:13 #7 0x562cc4a1a79b in aio_dispatch util/aio-posix.c:423:5 SUMMARY: AddressSanitizer: heap-use-after-free hw/display/virtio-gpu.c:18= 0:42 in virtio_gpu_ctrl_response With this change, the same reproducer triggers: qemu-system-i386: warning: Blocked re-entrant IO on MemoryRegion: virtio-= pci-common-virtio-gpu at addr: 0x6 Cc: qemu-stable@nongnu.org Reported-by: Alexander Bulekov Reported-by: Yongkang Jia Reported-by: Xiao Lei Reported-by: Yiming Tao Buglink: https://bugs.launchpad.net/qemu/+bug/1888606 Signed-off-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Gerd Hoffmann --- hw/display/virtio-gpu.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c index 78d5a4f164..3ab94a9735 100644 --- a/hw/display/virtio-gpu.c +++ b/hw/display/virtio-gpu.c @@ -1492,10 +1492,8 @@ void virtio_gpu_device_realize(DeviceState *qdev, Er= ror **errp) =20 g->ctrl_vq =3D virtio_get_queue(vdev, 0); g->cursor_vq =3D virtio_get_queue(vdev, 1); - g->ctrl_bh =3D qemu_bh_new_guarded(virtio_gpu_ctrl_bh, g, - &qdev->mem_reentrancy_guard); - g->cursor_bh =3D qemu_bh_new_guarded(virtio_gpu_cursor_bh, g, - &qdev->mem_reentrancy_guard); + g->ctrl_bh =3D virtio_bh_new_guarded(vdev, virtio_gpu_ctrl_bh, g); + g->cursor_bh =3D virtio_bh_new_guarded(vdev, virtio_gpu_cursor_bh, g); g->reset_bh =3D qemu_bh_new(virtio_gpu_reset_bh, g); qemu_cond_init(&g->reset_cond); QTAILQ_INIT(&g->reslist); --=20 2.41.0 From nobody Fri May 17 09:21:08 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1712258098; cv=none; d=zohomail.com; s=zohoarc; b=CBRW0BYlEVma1gHsSqwv7q2LLV16xdPtGgkAt1fp89J43Ud6ldYMUt5efOt4xtYOsOGG9khrKucojj0sqOFCxcsU3eklW2GliZZRE3ap0uuAUQZR4XZGEjTsLbEnArKBQP96rwofEPAuu/1hv0WsxmLuTYBj1yUczxubyZOPQgY= ARC-Message-Signature: i=1; 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Thu, 04 Apr 2024 12:14:00 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Gerd Hoffmann , Amit Shah , "Michael S. Tsirkin" , Alexander Bulekov , "Gonglei (Arei)" , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Laurent Vivier , Mauro Matteo Cascella , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-stable@nongnu.org Subject: [PATCH-for-9.0 3/4] hw/char/virtio-serial-bus: Protect from DMA re-entrancy bugs Date: Thu, 4 Apr 2024 21:13:38 +0200 Message-ID: <20240404191339.5688-4-philmd@linaro.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240404191339.5688-1-philmd@linaro.org> References: <20240404191339.5688-1-philmd@linaro.org> 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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::530; envelope-from=philmd@linaro.org; helo=mail-ed1-x530.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1712258099501100001 Replace qemu_bh_new_guarded() by virtio_bh_new_guarded() so the bus and device use the same guard. Otherwise the DMA-reentrancy protection can be bypassed. Cc: qemu-stable@nongnu.org Suggested-by: Alexander Bulekov Signed-off-by: Philippe Mathieu-Daud=C3=A9 Acked-by: Michael S. Tsirkin Reviewed-by: Gerd Hoffmann --- hw/char/virtio-serial-bus.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c index 016aba6374..cd0e3a11f7 100644 --- a/hw/char/virtio-serial-bus.c +++ b/hw/char/virtio-serial-bus.c @@ -985,8 +985,7 @@ static void virtser_port_device_realize(DeviceState *de= v, Error **errp) return; } =20 - port->bh =3D qemu_bh_new_guarded(flush_queued_data_bh, port, - &dev->mem_reentrancy_guard); + port->bh =3D virtio_bh_new_guarded(vdev, flush_queued_data_bh, port); port->elem =3D NULL; } =20 --=20 2.41.0 From nobody Fri May 17 09:21:08 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1712258090; cv=none; d=zohomail.com; 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Tsirkin" , Alexander Bulekov , "Gonglei (Arei)" , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Laurent Vivier , Mauro Matteo Cascella , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-stable@nongnu.org Subject: [PATCH-for-9.0 4/4] hw/virtio/virtio-crypto: Protect from DMA re-entrancy bugs Date: Thu, 4 Apr 2024 21:13:39 +0200 Message-ID: <20240404191339.5688-5-philmd@linaro.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240404191339.5688-1-philmd@linaro.org> References: <20240404191339.5688-1-philmd@linaro.org> 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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::52b; envelope-from=philmd@linaro.org; helo=mail-ed1-x52b.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1712258091441100002 Replace qemu_bh_new_guarded() by virtio_bh_new_guarded() so the bus and device use the same guard. Otherwise the DMA-reentrancy protection can be bypassed. Cc: qemu-stable@nongnu.org Suggested-by: Alexander Bulekov Signed-off-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Gerd Hoffmann --- hw/virtio/virtio-crypto.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c index fe1313f2ad..ac1b67d1fb 100644 --- a/hw/virtio/virtio-crypto.c +++ b/hw/virtio/virtio-crypto.c @@ -1080,8 +1080,8 @@ static void virtio_crypto_device_realize(DeviceState = *dev, Error **errp) vcrypto->vqs[i].dataq =3D virtio_add_queue(vdev, 1024, virtio_crypto_handle_dataq_b= h); vcrypto->vqs[i].dataq_bh =3D - qemu_bh_new_guarded(virtio_crypto_dataq_bh, &vcrypto->vqs= [i], - &dev->mem_reentrancy_guard); + virtio_bh_new_guarded(vdev, virtio_crypto_dataq_bh, + &vcrypto->vqs[i]); vcrypto->vqs[i].vcrypto =3D vcrypto; } =20 --=20 2.41.0