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 X-Spam-Level: X-Spam-Status: No, score=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA697C11F6D for ; Tue, 6 Jul 2021 11:54:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BA0BC61C75 for ; Tue, 6 Jul 2021 11:54:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238200AbhGFLyZ (ORCPT ); Tue, 6 Jul 2021 07:54:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:47620 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237480AbhGFLgL (ORCPT ); Tue, 6 Jul 2021 07:36:11 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 54DF261DD0; Tue, 6 Jul 2021 11:28:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625570886; bh=Md+PWeccdaH1P25TBhNay+lk6iOBbKSSIXvLjJ4whyQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GvWR5xwsIL6IHewR4AeQtgL9wFQJIxupUd2YqQSvI5X7DBlrc4c4hgppXaapKMD7s V+AWsFS5fGNmxK+BtmiwnarK7LD/MYf1hCuBrlKP73RGDfgKlJ92NxHIONlE64DsuC DhCe6fV2ATXb9TEhsEjp+wH3hdR1E+3hdZgl63mUMOI/4Q7rN+5ktw7ikNGzj5mku1 YHAC2+edpBunotzVrR9R3W89bJC6mxUf+JIK7M2q2M3AQDIRc+EJIJiFFVqr18evix TYXtU+NQGgWbyALO9hMvrgidUpSoSR7YKr+x0lFQL28zml1s/WGxKq94Aibp7NnI0V 9I5ODOySWGt/Q== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Xie Yongji , Gerd Hoffmann , Sasha Levin , dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Subject: [PATCH AUTOSEL 4.14 12/45] drm/virtio: Fixes a potential NULL pointer dereference on probe failure Date: Tue, 6 Jul 2021 07:27:16 -0400 Message-Id: <20210706112749.2065541-12-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210706112749.2065541-1-sashal@kernel.org> References: <20210706112749.2065541-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Xie Yongji [ Upstream commit 17f46f488a5d82c5568e6e786cd760bba1c2ee09 ] The dev->dev_private might not be allocated if virtio_gpu_pci_quirk() or virtio_gpu_init() failed. In this case, we should avoid the cleanup in virtio_gpu_release(). Signed-off-by: Xie Yongji Link: http://patchwork.freedesktop.org/patch/msgid/20210517084913.403-1-xieyongji@bytedance.com Signed-off-by: Gerd Hoffmann Signed-off-by: Sasha Levin --- drivers/gpu/drm/virtio/virtgpu_kms.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c index bed450fbb216..e1a5e74f4080 100644 --- a/drivers/gpu/drm/virtio/virtgpu_kms.c +++ b/drivers/gpu/drm/virtio/virtgpu_kms.c @@ -261,6 +261,9 @@ void virtio_gpu_driver_unload(struct drm_device *dev) flush_work(&vgdev->config_changed_work); vgdev->vdev->config->del_vqs(vgdev->vdev); + if (!vgdev) + return; + virtio_gpu_modeset_fini(vgdev); virtio_gpu_ttm_fini(vgdev); virtio_gpu_free_vbufs(vgdev); -- 2.30.2