From patchwork Sun Apr 24 19:04:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12825035 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 3EA57C433F5 for ; Sun, 24 Apr 2022 19:04:49 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4E37A10F039; Sun, 24 Apr 2022 19:04:48 +0000 (UTC) Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by gabe.freedesktop.org (Postfix) with ESMTPS id C00F810EFA7 for ; Sun, 24 Apr 2022 19:04:40 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: dmitry.osipenko) with ESMTPSA id AEE281F44DAD DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1650827079; bh=b2ST04zm/Wc2+g1oGHK3LnebsnkduuUXRdFzzBAvqNs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RYqZIrqV2Et/qyugz9gIMrhJiZsmfGJNjT6FM6SWwMyYOQV8s8YN/GSTtA2dGwp5u p49w6MWQWN428gleVaqnJ1Oo82dX//FO8P1Zgq/YGDXK4dmKMYyWANGnBx6kP/Hxgi bSztUra9mR26Yclfgj5wBKXQdHA8Kvi+j1N8DlblfXcMBEt/B+MbQC9dRahFw0PCKW hSu44gaH+pxgo6/kOVHnXUwr50a4jN7WeEKYvCT4vJy4WuUYkxqaOZ/TCAC7V7nKsn wdFIJxwP1nxignskSiJ7LARwKSbD4lyoqDMxSg+2CJNDCb8/fuVm1VNvyMAJIXCdmd qC2QwCBYTwYHg== 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?= Subject: [PATCH v5 03/17] drm/virtio: Check whether transferred 2D BO is shmem Date: Sun, 24 Apr 2022 22:04:10 +0300 Message-Id: <20220424190424.540501-4-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220424190424.540501-1-dmitry.osipenko@collabora.com> References: <20220424190424.540501-1-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: Dmitry Osipenko , Dmitry Osipenko , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.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);