From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA946C433EF for ; Tue, 8 Mar 2022 13:17:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347128AbiCHNSx (ORCPT ); Tue, 8 Mar 2022 08:18:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33414 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347096AbiCHNSk (ORCPT ); Tue, 8 Mar 2022 08:18:40 -0500 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E6DF0BC33 for ; Tue, 8 Mar 2022 05:17:40 -0800 (PST) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: dmitry.osipenko) with ESMTPSA id DC4201F4404D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1646745459; bh=chUCxgrXxxLP18r48yk/BRUcyw0NU6neGfKRFCcPg+8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RAMZgwvbW2XOy+frKOBEYxArTnDRzdt+R64V2yCLaTLaZHgjKscL80dfb6PfZ6GmQ I1jjo4BtX31ZIdTh5I3vczLk3m22XdmCthCfyL+yZbmZTwStts28WROgUqyQFirKnY M4MfMXgijeV+Xkoq26vw+0vlamzK2YtClTpTxcL56L2dPGMtMC+vwGzo2aivkCpxXJ CLI0pY1qlsnBxDl9n3gKc6QFhu7uU74u5yTzsGeZ2TSosc8l8ZLy1Zs1A9dUfEJFro Aoq70epRHjQKs+sj1cIae/mXGOnkntpxxFiK0MzoY3eIPj5juYMMR1EkLOSUmd0lsv kAamol1Tr3+Gw== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Daniel Almeida , Gert Wollny Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Gustavo Padovan , Daniel Stone , Tomeu Vizoso , virtualization@lists.linux-foundation.org, Dmitry Osipenko Subject: [PATCH v1 2/5] drm/virtio: Check whether transferred 2D BO is shmem Date: Tue, 8 Mar 2022 16:17:22 +0300 Message-Id: <20220308131725.60607-3-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220308131725.60607-1-dmitry.osipenko@collabora.com> References: <20220308131725.60607-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Transferred 2D BO always must be a shmem BO. Add check for that to prevent NULL dereference if userspace passes a VRAM BO. 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); -- 2.35.1