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=-5.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 A62A5C3F2D2 for ; Fri, 28 Feb 2020 14:34:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 707782469F for ; Fri, 28 Feb 2020 14:34:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582900482; bh=st/JhqZfXx68Vtalr2fPLfiiO80txyvp8AZS55d7ra8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=t3J26xdfZgnwgjdGZHe8m8ihv3Z2RHtUnmAHREM1WofcgEVm/Bj+wE4l4aUMtINy7 YF+v8T+N4cJr6aqO0+uHDqn1EZ1SRN4EbTLVxGQJOBb0/Lp8C04MkhkjlkcffNYruf giY7lZgZv3YdKFdjTqsOrtymlyJ0zhAIZGYixs5w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727164AbgB1Oel (ORCPT ); Fri, 28 Feb 2020 09:34:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:35950 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726805AbgB1Oek (ORCPT ); Fri, 28 Feb 2020 09:34:40 -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 82A4C2469F; Fri, 28 Feb 2020 14:34:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582900479; bh=st/JhqZfXx68Vtalr2fPLfiiO80txyvp8AZS55d7ra8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=WBjTaXnmvEDuLbVlaTcLL3BwcSe6IWSolt0I2TUz9UGMkWYdclamgFpN3srsJsTmv FCb2dRSn4aoLmvPg3vkmU1A4OwBPX5W8jpvX7vyBdE8GsSWsz4E/IkUMm8d4j+avcK i/sdgsv1l2J+7DFTm97F2IP4VO5OzLbY8aYfGbCI= Date: Fri, 28 Feb 2020 15:34:36 +0100 From: Greg KH To: Jiri Slaby Cc: syzbot , linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: possible deadlock in tty_unthrottle Message-ID: <20200228143436.GB3054483@kroah.com> References: <000000000000be57bf059f8aa7b9@google.com> <6590a26d-8234-67a8-16e0-6391da6765d9@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6590a26d-8234-67a8-16e0-6391da6765d9@suse.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 28, 2020 at 02:34:48PM +0100, Jiri Slaby wrote: > On 27. 02. 20, 9:39, syzbot wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: f8788d86 Linux 5.6-rc3 git tree: upstream > > console output: > > https://syzkaller.appspot.com/x/log.txt?x=1102d22de00000 kernel > > config: https://syzkaller.appspot.com/x/.config?x=5d2e033af114153f > > dashboard link: > > https://syzkaller.appspot.com/bug?extid=26183d9746e62da329b8 > > compiler: clang version 10.0.0 > > (https://github.com/llvm/llvm-project/ > > c2443155a0fb245c8f17f2c1c72b6ea391e86e81) > > > > 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+26183d9746e62da329b8@syzkaller.appspotmail.com > > So trying below, but there is no reproducer for the issue, so I am not > sure if it triggers any action at all. > > #syz test: > git://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git vc_sel Ah, yeah, no reproducer :( Ok, I'll queue these up and see what happens, thanks! greg k-h