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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 4AC83C2D0DB for ; Tue, 28 Jan 2020 12:49:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 24BA0206A2 for ; Tue, 28 Jan 2020 12:49:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726073AbgA1MtP (ORCPT ); Tue, 28 Jan 2020 07:49:15 -0500 Received: from mx2.suse.de ([195.135.220.15]:42240 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725283AbgA1MtP (ORCPT ); Tue, 28 Jan 2020 07:49:15 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 21450AD54; Tue, 28 Jan 2020 12:49:13 +0000 (UTC) Date: Tue, 28 Jan 2020 13:49:12 +0100 From: Petr Mladek To: anon anon <742991625abc@gmail.com> Cc: b.zolnierkie@samsung.com, wangkefeng.wang@huawei.com, sergey.senozhatsky@gmail.com, syzkaller@googlegroups.com, linux-kernel@vger.kernel.org Subject: Re: KASAN: slab-out-of-bounds Write in vgacon_scroll Message-ID: <20200128124912.chttagasucdpydhk@pathway.suse.cz> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170912 (1.9.0) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 2020-01-28 18:23:46, anon anon wrote: > Dear Linux kernel developers, > > I found the crash "KASAN: slab-out-of-bounds Write in vgacon_scroll" > when running syzkaller, hope it's unknown: > > Linux version: Linux v4.17-rc4 (75bc37fefc44) > Branch: master > > This crash still exists on the latest linux kernel Linux v5.5-rc6. > Please get C repo and crash log generated by syzkaller, as well as the > .config I used for linux kernel from the attachment. Thanks. The out-of-bound access seems to be in vgacon_scroll() and thus in vgacon code. Unfortunately, most people in CC are printk-guys. They were mentioned by ./scripts/get_maintainer.pl -f drivers/video/console/vgacon.c just because the very last comment (tree wide pr_warning() clean up). Bartolomej seems to be the only relevant name. Bartolomej, are you going to look at it? Or should we add more people or some list (dri-devel@lists.freedesktop.org or linux-fbdev@vger.kernel.org) into CC? Thanks, Petr