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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 A76E1C33CB1 for ; Tue, 14 Jan 2020 08:39:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 73D492084D for ; Tue, 14 Jan 2020 08:39:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578991164; bh=ibooc4ilG3fQgevj3cmSZM514xfAkkxvVViw+scuzd4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=sMSK5k1+w4EidQrzfCFiGzpkSlsPuvxEUCp1GRcOfZbWaAuMzo7K2g/cHb8uMqJLZ 5lvIXzd/kZA9QJ4i/NkUtojd71ErWv37c71LeNe8zyiMPgRqyJKipv6ynbCGhPY+vK NRwaav4S/cnZAoM7R68S4c3Esxp8CxKEgO635Tzs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726379AbgANIjX (ORCPT ); Tue, 14 Jan 2020 03:39:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:44502 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725842AbgANIjX (ORCPT ); Tue, 14 Jan 2020 03:39:23 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 EB4E5207FF; Tue, 14 Jan 2020 08:39:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578991162; bh=ibooc4ilG3fQgevj3cmSZM514xfAkkxvVViw+scuzd4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=sggS8/ihqlAuR3aPWn/m+ljuNPPLtoNjrFFh/UGju4ln9fyab22LGQxrv2kwiaAwB PG4oC0DU1UFok5Yz6pQTuv57zUJ0LjbnpA2NOc87n746rbsj10M6tWQWF0jcuuNmwD V31FHgL5H+1y0isdM9D7E5JHTV4Vm4ihdVJ+J9K0= Date: Tue, 14 Jan 2020 09:39:19 +0100 From: Greg KH To: wchenbt@cse.ust.hk Cc: linux-kernel@vger.kernel.org, syzkaller@googlegroups.com, jslaby@suse.com, nico@fluxnic.net, textshell@uchuujin.de Subject: Re: KASAN: use-after-free Read in vc_do_resize; KASAN: use-after-free Read in screen_glyph_unicode; Message-ID: <20200114083919.GB1113529@kroah.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 14, 2020 at 03:16:36PM +0800, wchenbt@cse.ust.hk wrote: > Dear Linux kernel developers, > > I found the crash "KASAN: use-after-free Read in vc_do_resize" and "KASAN: > use-after-free Read in screen_glyph_unicode" when running syzkaller, hope > it’s unknown: > > Linux version: 1c163f4c7b3f Linux 5.0 > Branch: drivers/tty/vt/vt.c "Branch" is a filename? And 5.0 is almost a year old, please use a more modern kernel, like 5.4 at the very least. And patches are the best way to fix syzbot issues, if you can still reproduce this, sending a patch is the best way to get it fixed. thanks, greg k-h