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 85912C433FE for ; Sun, 17 Apr 2022 22:37:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235166AbiDQWkM (ORCPT ); Sun, 17 Apr 2022 18:40:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232635AbiDQWkH (ORCPT ); Sun, 17 Apr 2022 18:40:07 -0400 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 A8F0217054 for ; Sun, 17 Apr 2022 15:37:30 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: dmitry.osipenko) with ESMTPSA id CF5AD1F40EAA DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1650235049; bh=wczZ5iN2wkFP7L3LjYkS8mg7jidJdoFxxHCwNVCzNBg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KQxBh9VnkNFyViiSMyZoARIdz0dWSt92DPFlfvHgkOPS/m9PhC1Bf/+Es17Jb5NVM t3nUSfDknsJpE2aHgLFYIIuYB0ev9vcbC1VWOQea+kX74MubPnGEXPFT62Pv2ye91c W41KEFx3T5DX2kvXWyk4W6Xd12acKUPl0lnk+fPxeRorZfsr5Br6fCo3VnuNZhUsPt 8gskDBwv6q7JCa+5F6AUElJgAmYlyXCuNZkFbvc7eH5cKwHc5zHaEPGbByEqx7cvO4 msWchXzEcI0+CCAb0sPqRanH+Y2GmeDrxnV+AekdzNW2vw90kUIvOF29STbNERPXjG r01/MF9VtUVdg== 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 Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Dmitry Osipenko , Dmitry Osipenko Subject: [PATCH v4 01/15] drm/virtio: Correct drm_gem_shmem_get_sg_table() error handling Date: Mon, 18 Apr 2022 01:36:53 +0300 Message-Id: <20220417223707.157113-2-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220417223707.157113-1-dmitry.osipenko@collabora.com> References: <20220417223707.157113-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org drm_gem_shmem_get_sg_table() never ever returned NULL on error. Correct the error handling to avoid crash on OOM. Cc: stable@vger.kernel.org Reviewed-by: Emil Velikov Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/virtio/virtgpu_object.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c index f293e6ad52da..3d0c8d4d1c20 100644 --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -168,9 +168,11 @@ static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev, * since virtio_gpu doesn't support dma-buf import from other devices. */ shmem->pages = drm_gem_shmem_get_sg_table(&bo->base); - if (!shmem->pages) { + ret = PTR_ERR_OR_ZERO(shmem->pages); + if (ret) { drm_gem_shmem_unpin(&bo->base); - return -EINVAL; + shmem->pages = NULL; + return ret; } if (use_dma_api) { -- 2.35.1