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=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 1875CC433E7 for ; Mon, 12 Oct 2020 13:40:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD2D221BE5 for ; Mon, 12 Oct 2020 13:40:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602510001; bh=xfPx18DR1Yo1IeyBOmicVze493qZfk5VFd3DR5Muv9U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qEudgpF4MsMGg0jZfQuEV93OUTcg5Nd8KLeSDowgiqhsJhyqUPhPethtNwxaNm6sK VDp5SHNKlPjMGPZGDZK3zlbco/bEPTkDjwugsazPx0Qs6VjqXdN8j+TRrd0zJI891e cEiUVl21152NyxBsKBDdZbANdZeKFrWRdvZT4+TM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388701AbgJLNkA (ORCPT ); Mon, 12 Oct 2020 09:40:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:43220 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731370AbgJLNjZ (ORCPT ); Mon, 12 Oct 2020 09:39:25 -0400 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 Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Karol Herbst , dri-devel , Dave Airlie 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 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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;