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 D587AC07E96 for ; Tue, 6 Jul 2021 12:04:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B92CD6115C for ; Tue, 6 Jul 2021 12:04:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240855AbhGFMHI (ORCPT ); Tue, 6 Jul 2021 08:07:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:47578 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237771AbhGFLhU (ORCPT ); Tue, 6 Jul 2021 07:37:20 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E9A4061DFA; Tue, 6 Jul 2021 11:29:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625570983; bh=8yNEdd/0MjZ/xocDbC+PHtFygZD/hiHQOqnRNmoxL2A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gGLz3ASUuoWKBkAiQlUFl8ZLXlbymlpX1HxfH1dLku4mWiLYY//fijbiE+phsr4w/ gnvinln6KrmDCpAngFyo6dyMon9oJvYqhsJ/qcs3XLmdNODfciUsXmy8lWrR0c4YGE NdOYdPhpaSQE2FFmd44FRj55dpJLhs0Wi+iboXaJcmBO+7AiYbxUB1IxliwZz/kdak JYAcBJdq/NqNdIQj1rPiOURchK0bqgNIdqvfEm0QB9DF5VEYTbOAGjXT3wEob3ilHE LuvDbGcrjRIix1p/LIS50/nVndDAVki3l/Dj7j5dk7boVjcuthMjfPFEnbwaJpg4g5 UWV54v3D1QWpg== 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 4.4 09/31] drm/virtio: Fix double free on probe failure Date: Tue, 6 Jul 2021 07:29:09 -0400 Message-Id: <20210706112931.2066397-9-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210706112931.2066397-1-sashal@kernel.org> References: <20210706112931.2066397-1-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 cec7f1774605a5ef47c134af62afe7c75c30b0ee ] The virtio_gpu_init() will free vgdev and vgdev->vbufs on failure. But such failure will be caught by virtio_gpu_probe() and then virtio_gpu_release() will be called to do some cleanup which will free vgdev and vgdev->vbufs again. So let's set dev->dev_private to NULL to avoid double free. Signed-off-by: Xie Yongji Link: http://patchwork.freedesktop.org/patch/msgid/20210517084913.403-2-xieyongji@bytedance.com Signed-off-by: Gerd Hoffmann Signed-off-by: Sasha Levin --- drivers/gpu/drm/virtio/virtgpu_kms.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c index 88ed5e235e55..fcf9b572ec03 100644 --- a/drivers/gpu/drm/virtio/virtgpu_kms.c +++ b/drivers/gpu/drm/virtio/virtgpu_kms.c @@ -233,6 +233,7 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags) err_vbufs: vgdev->vdev->config->del_vqs(vgdev->vdev); err_vqs: + dev->dev_private = NULL; kfree(vgdev); return ret; } -- 2.30.2