From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751111AbeEUGHG (ORCPT ); Mon, 21 May 2018 02:07:06 -0400 Received: from mail-it0-f69.google.com ([209.85.214.69]:40567 "EHLO mail-it0-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750859AbeEUGHC (ORCPT ); Mon, 21 May 2018 02:07:02 -0400 X-Google-Smtp-Source: AB8JxZqZXYWDw3Qm4Azi8usFn6FVqh2E3/LoEbUZqGlNI7dt4wLydt5f67lbalSYXi+JgyloO6zGr5hmyVEIrjI3qgKevSAGuRsG MIME-Version: 1.0 Date: Sun, 20 May 2018 23:07:02 -0700 In-Reply-To: <089e0825cec8180a2b0568c4ee1d@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003a8d73056cb11ca3@google.com> Subject: Re: WARNING in ext4_set_page_dirty From: syzbot To: adilger.kernel@dilger.ca, jack@suse.cz, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: 771c577c23ba Linux 4.17-rc6 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=108c9f37800000 kernel config: https://syzkaller.appspot.com/x/.config?x=982e2df1b9e60b02 dashboard link: https://syzkaller.appspot.com/bug?extid=9a44753ac327c557796a compiler: gcc (GCC) 8.0.1 20180413 (experimental) syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=1655584f800000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15134357800000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+9a44753ac327c557796a@syzkaller.appspotmail.com WARNING: CPU: 0 PID: 4577 at fs/ext4/inode.c:3894 ext4_set_page_dirty+0x28d/0x330 fs/ext4/inode.c:3894 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 4577 Comm: syz-executor342 Not tainted 4.17.0-rc6+ #61 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+0x1b9/0x294 lib/dump_stack.c:113 panic+0x22f/0x4de kernel/panic.c:184 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 RIP: 0010:ext4_set_page_dirty+0x28d/0x330 fs/ext4/inode.c:3894 RSP: 0018:ffff8801b38fe2a0 EFLAGS: 00010293 RAX: ffff8801aca16680 RBX: 1ffff1003671fc56 RCX: ffffffff82052441 RDX: 0000000000000000 RSI: ffffffff8205248d RDI: 0000000000000007 RBP: ffff8801b38fe378 R08: ffff8801aca16680 R09: 0000000000000006 R10: ffff8801aca16680 R11: 0000000000000000 R12: ffffea0007007f40 R13: 0000000000000000 R14: ffff8801b38fe350 R15: ffffea0007007f60 set_page_dirty+0x35f/0x6d0 mm/page-writeback.c:2566 set_page_dirty_lock+0x115/0x180 mm/page-writeback.c:2591 dio_bio_complete+0x599/0x870 fs/direct-io.c:559 dio_await_completion fs/direct-io.c:580 [inline] do_blockdev_direct_IO+0x4153/0x9e90 fs/direct-io.c:1388 __blockdev_direct_IO+0x9d/0xc6 fs/direct-io.c:1417 ext4_direct_IO_read fs/ext4/inode.c:3833 [inline] ext4_direct_IO+0xf90/0x2110 fs/ext4/inode.c:3865 generic_file_read_iter+0x510/0x2f00 mm/filemap.c:2341 ext4_file_read_iter+0x18b/0x3c0 fs/ext4/file.c:77 call_read_iter include/linux/fs.h:1778 [inline] new_sync_read fs/read_write.c:406 [inline] __vfs_read+0x696/0xa50 fs/read_write.c:418 vfs_read+0x17f/0x3d0 fs/read_write.c:452 ksys_pread64+0x174/0x1a0 fs/read_write.c:626 __do_sys_pread64 fs/read_write.c:636 [inline] __se_sys_pread64 fs/read_write.c:633 [inline] __x64_sys_pread64+0x97/0xf0 fs/read_write.c:633 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x445c09 RSP: 002b:00007f4eead2ad18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 00000000006dac74 RCX: 0000000000445c09 RDX: 00000000fffffd80 RSI: 0000000020002000 RDI: 0000000000000073 RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac70 R13: 00007f4eead2ad20 R14: 2e64657473757274 R15: 000000000000000b Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..