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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 523F4C00449 for ; Mon, 8 Oct 2018 09:38:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 23B7720878 for ; Mon, 8 Oct 2018 09:38:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 23B7720878 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727605AbeJHQsw (ORCPT ); Mon, 8 Oct 2018 12:48:52 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:34431 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726354AbeJHQsw (ORCPT ); Mon, 8 Oct 2018 12:48:52 -0400 Received: by mail-io1-f69.google.com with SMTP id y3-v6so19056739iob.1 for ; Mon, 08 Oct 2018 02:38:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=bSzIMWfrsFIpVBiWdk50WXI5a4gN9KyGl9brTZPcMzQ=; b=ISzE/cJjfYkNsv4YwdScMnLxhYZxwz91Ghx7jGtNzQe2MHTob1MOpx0vtvQ6LNu5H+ Z22yOcG5kffF4gU3Z0pycUCcu6ihYGQ9Dk9JUScAgRYi8KiWFgypf5cddSowm3o4Bp0i 2iJZuBvym9fPloSM5OQkBEkT+y5WblJFXnetqmjBVrXpOzAbAFJGCnEYsFwIQxD3f4eE gIZcXfGEr7FYS8Dvp7LTYp2sUs0XKIPAOVjzBSaBe3IKCSBO0lxwxNyDjhPVuCLhTJnN XotemL30dFdz8t5ZGdTzcIlNMGFHT6mmIxmcm8EFEE9UtWSvtFqbWNzPitpcX1aiUn83 Uh5w== X-Gm-Message-State: ABuFfohugJ0h6nprBG3A4reSuMM5K1X/mIv8VG3NO8KDV/vObZkmF0Jr bNBU19Y45jn4xxc+s8UY7ykK+9TbobV4dmYcNXxi1hxICd/b X-Google-Smtp-Source: ACcGV60IDkqpZ1qUcwadK5167ZReetu/WuX2sgEWpOTA18AAWGfE+06UJyAEqVoit2Ro1XD+iLHLH/fClsNVSJIAiDUc4swDVMN7 MIME-Version: 1.0 X-Received: by 2002:a24:7f05:: with SMTP id r5-v6mr15784351itc.2.1538991482793; Mon, 08 Oct 2018 02:38:02 -0700 (PDT) Date: Mon, 08 Oct 2018 02:38:02 -0700 In-Reply-To: <0000000000006971fa05769d22f6@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a4f48c0577b46064@google.com> Subject: Re: WARNING in request_end From: syzbot To: dvyukov@google.com, ktkhai@virtuozzo.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, miklos@szeredi.hu, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: 0238df646e62 Linux 4.19-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16daaa85400000 kernel config: https://syzkaller.appspot.com/x/.config?x=88e9a8a39dc0be2d dashboard link: https://syzkaller.appspot.com/bug?extid=ef054c4d3f64cd7f7cec compiler: gcc (GCC) 8.0.1 20180413 (experimental) userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=119bf2e6400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1760f806400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+ef054c4d3f64cd7f7cec@syzkaller.appspotmail.com 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 WARNING: CPU: 1 PID: 7459 at fs/fuse/dev.c:390 request_end+0x82e/0xaa0 fs/fuse/dev.c:390 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7459 Comm: syz-executor659 Not tainted 4.19.0-rc7+ #176 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 panic+0x238/0x4e7 kernel/panic.c:184 __warn.cold.8+0x163/0x1ba kernel/panic.c:536 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993 RIP: 0010:request_end+0x82e/0xaa0 fs/fuse/dev.c:390 Code: 3c 03 0f 8f 6f fe ff ff 48 8b bd f0 fe ff ff e8 78 63 3b ff e9 5e fe ff ff e8 1e f3 f7 fe 0f 0b e9 b0 fa ff ff e8 12 f3 f7 fe <0f> 0b e9 f0 fa ff ff e8 16 ca c1 fe e8 71 63 3b ff e9 5b fb ff ff RSP: 0018:ffff8801c65e7328 EFLAGS: 00010293 RAX: ffff8801cd3362c0 RBX: ffff8801cba17000 RCX: ffffffff8286dd65 RDX: 0000000000000000 RSI: ffffffff8286e27e RDI: 0000000000000007 RBP: ffff8801c65e7458 R08: ffff8801cd3362c0 R09: ffffed00391cd5bf R10: ffffed00391cd5bf R11: ffff8801c8e6adfb R12: 1ffff10038cbce6a R13: ffff8801c8e6ad80 R14: ffff8801cba17030 R15: ffff8801c65e7430 fuse_dev_do_write+0x192e/0x36e0 fs/fuse/dev.c:1915 fuse_dev_write+0x19a/0x240 fs/fuse/dev.c:1939 call_write_iter include/linux/fs.h:1808 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __ia32_sys_write+0x71/0xb0 fs/read_write.c:607 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f43ca9 Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f7efd1fc EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200002c0 RDX: 0000000000000050 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000003d0f00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..