From nobody Fri Dec 19 19:55:15 2025 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 5518DC38A2D for ; Mon, 24 Oct 2022 13:52:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236575AbiJXNwX (ORCPT ); Mon, 24 Oct 2022 09:52:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236569AbiJXNvg (ORCPT ); Mon, 24 Oct 2022 09:51:36 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1F22BA93E; Mon, 24 Oct 2022 05:42:32 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 84D2D61337; Mon, 24 Oct 2022 12:42:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9206AC433C1; Mon, 24 Oct 2022 12:42:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666615334; bh=MTUwvdIH1m4wWWH2KRVsJB59R2sbcD1HjU4sF/1AyAU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=glANfJzaSfUEcVCU91oth7V6J0ngMCh1VyDpCKwqu/LvtLNutoFSN67+Ukpz6Qw1M xQm2rCYniFzpRJPVPH5NaidiHPf228UKCEbmMjNzyUvbhtYVwvKzTu/axzxjf6C9Fj 0yTW1XHxMm7whyUwA5DvrCbGl42soRUnQzQp1qtY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Emil Velikov , Dmitry Osipenko , Gerd Hoffmann , Sasha Levin Subject: [PATCH 5.15 212/530] drm/virtio: Correct drm_gem_shmem_get_sg_table() error handling Date: Mon, 24 Oct 2022 13:29:16 +0200 Message-Id: <20221024113054.675848072@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221024113044.976326639@linuxfoundation.org> References: <20221024113044.976326639@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Dmitry Osipenko [ Upstream commit 64b88afbd92fbf434759d1896a7cf705e1c00e79 ] Previous commit fixed checking of the ERR_PTR value returned by drm_gem_shmem_get_sg_table(), but it missed to zero out the shmem->pages, which will crash virtio_gpu_cleanup_object(). Add the missing zeroing of the shmem->pages. Fixes: c24968734abf ("drm/virtio: Fix NULL vs IS_ERR checking in virtio_gpu= _object_shmem_init") Reviewed-by: Emil Velikov Signed-off-by: Dmitry Osipenko Link: http://patchwork.freedesktop.org/patch/msgid/20220630200726.1884320-2= -dmitry.osipenko@collabora.com Signed-off-by: Gerd Hoffmann Signed-off-by: Sasha Levin --- drivers/gpu/drm/virtio/virtgpu_object.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virt= io/virtgpu_object.c index 248ecd3006c3..7e75fb0fc7bd 100644 --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -169,6 +169,7 @@ static int virtio_gpu_object_shmem_init(struct virtio_g= pu_device *vgdev, shmem->pages =3D drm_gem_shmem_get_sg_table(&bo->base); if (IS_ERR(shmem->pages)) { drm_gem_shmem_unpin(&bo->base); + shmem->pages =3D NULL; return PTR_ERR(shmem->pages); } =20 --=20 2.35.1