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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35A58C433F5 for ; Wed, 20 Apr 2022 12:27:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378518AbiDTM3z (ORCPT ); Wed, 20 Apr 2022 08:29:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41466 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232349AbiDTM3x (ORCPT ); Wed, 20 Apr 2022 08:29:53 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E7C8286E1; Wed, 20 Apr 2022 05:27:08 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id CE26361988; Wed, 20 Apr 2022 12:27:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6DEC5C385A0; Wed, 20 Apr 2022 12:27:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1650457627; bh=jxli10XRiJdu42WSS8669uK+pbmxZax4+eLzHGUJeog=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=QvMQcJRWhCY8JiZNLpIrt4IupUkvwhgGmFy1kp+vXYY6YuokOuL2TiMZ0DaciGLCa A7Oa33f7bYiHsZEbrcpPg/qE70QOJIjrWyOml+v1oQ84ZD1VAuQpO6hTl9cnE9gn4d FV3VxPKgBBTHiJY/nhD6g3HJCvmjhRY9CmPrpbUemxU3A7+y366NCRBuEaqMjNqer1 uczOwTmgshhIFM6YZNNefno2zGYnw/PiVUdcA9MAqbdI+o/zhRDeuA1hdsylzjGvzi HY6MGJfU1UtzkDwLArtWaBy7GCfA6eNCTEj67CYSRX+TBOwJ3oMLGlAvKW4R1UG6lu 3XuRYLzl7q8iQ== Date: Wed, 20 Apr 2022 14:27:02 +0200 From: Christian Brauner To: syzbot Cc: fweisbec@gmail.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, viro@zeniv.linux.org.uk Subject: Re: [syzbot] INFO: rcu detected stall in sys_lsetxattr Message-ID: <20220420122702.lseed5l3lrssyat2@wittgenstein> References: <00000000000080e10e05dd043247@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <00000000000080e10e05dd043247@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 19, 2022 at 09:16:20AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 40354149f4d7 Add linux-next specific files for 20220414 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=16ae0bd0f00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=a44d62051576f6f5 > dashboard link: https://syzkaller.appspot.com/bug?extid=306090cfa3294f0bbfb3 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=164417ccf00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=104d63d0f00000 > > The issue was bisected to: > > commit e257039f0fc7da36ac3a522ef9a5cb4ae7852e67 > Author: Al Viro > Date: Tue Mar 1 04:04:20 2022 +0000 > > mount_setattr(): clean the control flow and calling conventions > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14622210f00000 > final oops: https://syzkaller.appspot.com/x/report.txt?x=16622210f00000 > console output: https://syzkaller.appspot.com/x/log.txt?x=12622210f00000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+306090cfa3294f0bbfb3@syzkaller.appspotmail.com > Fixes: e257039f0fc7 ("mount_setattr(): clean the control flow and calling conventions") #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git fs.mount_setattr.cleanup