From patchwork Thu May 26 23:50:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12862925 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 85AEEC433F5 for ; Thu, 26 May 2022 23:54:32 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C711810F05D; Thu, 26 May 2022 23:54:31 +0000 (UTC) Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8E49810F3E3; Thu, 26 May 2022 23:54:28 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: dmitry.osipenko) with ESMTPSA id 8F3AE1F40887 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1653609267; bh=xPahHFXhmzFRvwHWi9um3lr6dS/zSQQnyahtz13WrNk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=E2dOSzH2bYscAM2yw+OsJQF6ASXzoHeHyCW2JAYd9BoRUHhbsYdmJ8LiEFfuw4PKg 9+sypQggxGc7h/M7vxZP9YcFWj+u2FkT5drukiTUXFiPtzBrkBwqGJLQAYK8ZZQPqC 3kIkbt0/wh1LzZa6jReVPQMdIoyAGL+sOirNZZxosMKbaVhSAEbSsQCPio5EaWc6g2 7WBVF1do7xnITJPp47lKbqvEd1BHUmph+ejBV/8nPwS+v5ywMOtUccLe0UFQInaddj TOuGZOeaBJhIkpw56yt4VLRZXcb/qMhwx6cBABDqhHh0pnxPh/p6ttBjiKP2QVO80L jV8dOkXnd5L5A== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Daniel Almeida , Gert Wollny , Gustavo Padovan , Daniel Stone , Tomeu Vizoso , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Steven Price , Alyssa Rosenzweig , Rob Clark , Emil Velikov , Robin Murphy , Qiang Yu , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , "Pan, Xinhui" , Thierry Reding , Tomasz Figa , Marek Szyprowski , Mauro Carvalho Chehab , Alex Deucher , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin Subject: [PATCH v6 06/22] drm/virtio: Check whether transferred 2D BO is shmem Date: Fri, 27 May 2022 02:50:24 +0300 Message-Id: <20220526235040.678984-7-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220526235040.678984-1-dmitry.osipenko@collabora.com> References: <20220526235040.678984-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linaro-mm-sig@lists.linaro.org, amd-gfx@lists.freedesktop.org, Dmitry Osipenko , linux-tegra@vger.kernel.org, Dmitry Osipenko , kernel@collabora.com, linux-media@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Transferred 2D BO always must be a shmem BO. Add check for that to prevent NULL dereference if userspace passes a VRAM BO. Cc: stable@vger.kernel.org Reviewed-by: Emil Velikov Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/virtio/virtgpu_vq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index 7c052efe8836..2edf31806b74 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -595,7 +595,7 @@ void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev, bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev); struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo); - if (use_dma_api) + if (virtio_gpu_is_shmem(bo) && use_dma_api) dma_sync_sgtable_for_device(vgdev->vdev->dev.parent, shmem->pages, DMA_TO_DEVICE);