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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 5923DC47257 for ; Mon, 4 May 2020 19:04:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 346C720721 for ; Mon, 4 May 2020 19:04:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="F6bvNdDU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727871AbgEDTEX (ORCPT ); Mon, 4 May 2020 15:04:23 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:35679 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727859AbgEDTEF (ORCPT ); Mon, 4 May 2020 15:04:05 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588619045; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=UQThDJEUDr/92+sgwacANdF+cPlLZR5WZG2TjmvmO5M=; b=F6bvNdDUwj1YGjf4x2neF1Fy3EUiQUjyz25NCM2ZLMOvDBdTz5pJRhWTVRfoy4fsn9VJ/l RYASd1iXTAfTsM3qXBKBxYWtE2j5duDFXkeos1ggCx5syLqRu6SOu2j4SwOFZmYaMDLJO2 DEJMZhmCzIR2RQHOvGdz3swZxYKHNfE= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-192-JW7jwDGzNVOEaAWa-UeBTw-1; Mon, 04 May 2020 15:03:55 -0400 X-MC-Unique: JW7jwDGzNVOEaAWa-UeBTw-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 846C5107ACF2; Mon, 4 May 2020 19:03:53 +0000 (UTC) Received: from treble (ovpn-117-112.rdu2.redhat.com [10.10.117.112]) by smtp.corp.redhat.com (Postfix) with ESMTPS id DDDED63BBA; Mon, 4 May 2020 19:03:50 +0000 (UTC) Date: Mon, 4 May 2020 14:03:48 -0500 From: Josh Poimboeuf To: syzbot Cc: bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, netdev@vger.kernel.org, peterz@infradead.org, shile.zhang@linux.alibaba.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Subject: Re: BUG: stack guard page was hit in unwind_next_frame Message-ID: <20200504190348.iphzmd7micvidh46@treble> References: <0000000000005a8fe005a4b8a114@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <0000000000005a8fe005a4b8a114@google.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Sat, May 02, 2020 at 11:36:11PM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 8999dc89 net/x25: Fix null-ptr-deref in x25_disconnect > git tree: net > console output: https://syzkaller.appspot.com/x/log.txt?x=16004440100000 > kernel config: https://syzkaller.appspot.com/x/.config?x=b7a70e992f2f9b68 > dashboard link: https://syzkaller.appspot.com/bug?extid=e73ceacfd8560cc8a3ca > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+e73ceacfd8560cc8a3ca@syzkaller.appspotmail.com Infinite loop in network code. #syz dup: BUG: stack guard page was hit in deref_stack_reg -- Josh