From patchwork Mon Oct 12 13:26:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 11832707 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E76C3139F for ; Mon, 12 Oct 2020 13:39:30 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B679922202 for ; Mon, 12 Oct 2020 13:39:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="JCTsfky4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B679922202 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8C2CA89FA9; Mon, 12 Oct 2020 13:39:27 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id 63EBE89FA9 for ; Mon, 12 Oct 2020 13:39:26 +0000 (UTC) Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7EE14221FE; Mon, 12 Oct 2020 13:39:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602509965; bh=xfPx18DR1Yo1IeyBOmicVze493qZfk5VFd3DR5Muv9U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JCTsfky4SZ7rjzPz8734OX9/65ovFiFsYvb9M37kARVnpG3oZ+UtYqDVLq5soQdwU jSxzCLHYUzbbfWaM3TLahlZag/1c+AR6KS07WBS/kWmF1zmdYCcfeEVgTA4NHn8Ewj pmuppFYybANZVNW1CjWxqMdlnAY7CLreq57nQLT4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Subject: [PATCH 4.19 06/49] drm/nouveau/mem: guard against NULL pointer access in mem_del Date: Mon, 12 Oct 2020 15:26:52 +0200 Message-Id: <20201012132629.739034353@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201012132629.469542486@linuxfoundation.org> References: <20201012132629.469542486@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Greg Kroah-Hartman , dri-devel , Karol Herbst , stable@vger.kernel.org, Dave Airlie Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Karol Herbst commit d10285a25e29f13353bbf7760be8980048c1ef2f upstream. other drivers seems to do something similar Signed-off-by: Karol Herbst Cc: dri-devel Cc: Dave Airlie Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie Link: https://patchwork.freedesktop.org/patch/msgid/20201006220528.13925-2-kherbst@redhat.com Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/nouveau/nouveau_mem.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/nouveau/nouveau_mem.c +++ b/drivers/gpu/drm/nouveau/nouveau_mem.c @@ -176,6 +176,8 @@ void nouveau_mem_del(struct ttm_mem_reg *reg) { struct nouveau_mem *mem = nouveau_mem(reg); + if (!mem) + return; nouveau_mem_fini(mem); kfree(reg->mm_node); reg->mm_node = NULL;