syzbot


INFO: task hung in nilfs_detach_log_writer

Status: upstream: reported C repro on 2022/10/24 10:07
Subsystems: nilfs
[Documentation on labels]
Reported-by: syzbot+e3973c409251e136fdd0@syzkaller.appspotmail.com
First crash: 548d, last: 6d00h
Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in account_page_dirtied (log)
Repro: C syz .config
  
Discussions (11)
Title Replies (including bot) Last reply
[syzbot] Monthly nilfs report (Mar 2024) 0 (1) 2024/03/05 11:10
[syzbot] Monthly nilfs report (Feb 2024) 0 (1) 2024/02/02 21:05
[syzbot] Monthly nilfs report (Oct 2023) 0 (1) 2023/11/01 10:11
[syzbot] Monthly nilfs report (Sep 2023) 0 (1) 2023/10/02 09:42
[syzbot] Monthly nilfs report (Aug 2023) 0 (1) 2023/08/30 09:54
[syzbot] Monthly nilfs report (Jul 2023) 0 (1) 2023/07/30 13:15
[syzbot] Monthly nilfs report (Jun 2023) 0 (1) 2023/06/29 08:55
[syzbot] Monthly nilfs report (May 2023) 0 (1) 2023/05/29 08:50
[syzbot] Monthly nilfs report (Apr 2023) 0 (1) 2023/04/27 10:39
[syzbot] Monthly nilfs report 0 (1) 2023/03/27 11:03
[syzbot] INFO: task hung in nilfs_detach_log_writer 0 (1) 2022/10/24 10:07
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: task hung in nilfs_detach_log_writer 2 19d 31d 0/3 upstream: reported on 2024/03/19 22:14
linux-6.1 INFO: task hung in nilfs_detach_log_writer 3 8d07h 18d 0/3 upstream: reported on 2024/04/01 22:54
Last patch testing requests (10)
Created Duration User Patch Repo Result
2024/03/22 14:45 23m retest repro upstream error OK
2024/02/16 08:50 24m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/02/16 08:50 27m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/02/16 08:50 32m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/02/16 08:50 26m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/02/14 14:09 22m retest repro upstream OK log
2024/02/14 14:09 19m retest repro upstream OK log
2023/11/29 10:18 13m retest repro upstream report log
2023/11/29 08:25 18m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2023/11/29 08:25 16m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/12/15 14:27 2h41m bisect fix upstream job log (0) log

Sample crash report:
INFO: task syz-executor272:5093 blocked for more than 143 seconds.
      Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor272 state:D stack:23184 pid:5093  tgid:5093  ppid:5091   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x1781/0x49d0 kernel/sched/core.c:6736
 __schedule_loop kernel/sched/core.c:6813 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6828
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2548
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
 __flush_work+0xa7b/0xc90 kernel/workqueue.c:4205
 nilfs_segctor_destroy fs/nilfs2/segment.c:2769 [inline]
 nilfs_detach_log_writer+0x47d/0xbe0 fs/nilfs2/segment.c:2853
 nilfs_put_super+0x4d/0x160 fs/nilfs2/super.c:499
 generic_shutdown_super+0x136/0x2d0 fs/super.c:641
 kill_block_super+0x44/0x90 fs/super.c:1675
 deactivate_locked_super+0xc4/0x130 fs/super.c:472
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267
 task_work_run+0x24f/0x310 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x168/0x360 kernel/entry/common.c:212
 do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f7bd0b4f347
RSP: 002b:00007ffe653ed1d8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f7bd0b4f347
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe653ed290
RBP: 00007ffe653ed290 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffe653ee2f0
R13: 000055558aab36c0 R14: 0000000000000063 R15: 431bde82d7b634db
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/1:2/1783:
 #0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
 #0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335
 #1: ffffc90004ff7d00 ((work_completion)(&sci->sc_iput_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
 #1: ffffc90004ff7d00 ((work_completion)(&sci->sc_iput_work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335
 #2: ffff88807c026610 (sb_internal#2){.+.+}-{0:0}, at: nilfs_evict_inode+0x167/0x500 fs/nilfs2/inode.c:930
1 lock held by klogd/4502:
 #0: ffff8880b943e318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
2 locks held by getty/4815:
 #0: ffff88802ea9a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f0e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor272/5093:
 #0: ffff88807c0260e0 (&type->s_umount_key#44){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff88807c0260e0 (&type->s_umount_key#44){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff88807c0260e0 (&type->s_umount_key#44){+.+.}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:504

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xfb0/0xff0 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112

Crashes (121):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/14 11:04 upstream fe46a7dd189e c8349e48 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root INFO: task hung in nilfs_detach_log_writer
2022/11/06 05:34 upstream b208b9fbbcba 6d752409 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root INFO: task hung in nilfs_detach_log_writer
2023/10/12 20:08 upstream 401644852d0b 1b231e3c .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/09/29 11:02 upstream 9ed22ae6be81 d265efd8 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/02/27 18:28 upstream f3a2439f20d9 9189cb53 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2022/10/27 19:14 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bbed346d5a96 86777b7f .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci-upstream-gce-arm64 INFO: task hung in nilfs_detach_log_writer
2022/10/25 02:50 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bbed346d5a96 ff2fe65d .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci-upstream-gce-arm64 INFO: task hung in nilfs_detach_log_writer
2022/10/24 23:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bbed346d5a96 ff2fe65d .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci-upstream-gce-arm64 INFO: task hung in nilfs_detach_log_writer
2022/10/20 10:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bbed346d5a96 b31320fc .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci-upstream-gce-arm64 INFO: task hung in nilfs_detach_log_writer
2024/04/06 17:59 upstream fe46a7dd189e ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in nilfs_detach_log_writer
2024/03/07 09:31 upstream 67be068d31d4 f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2024/03/01 20:32 upstream 87adedeba51a 83acf9e0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2024/02/20 04:38 upstream b401b621758e 3af7dd65 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2024/01/31 13:38 upstream 2a6526c4f389 373b66cd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in nilfs_detach_log_writer
2024/01/22 18:16 upstream 6613476e225e 9bd8dcda .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2024/01/07 06:31 upstream 52b1853b080a d0304e9c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in nilfs_detach_log_writer
2023/11/15 07:56 upstream c42d9eeef8e5 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/11/07 10:20 upstream be3ca57cfb77 83211397 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/11/06 21:05 upstream d2f51b3516da 78fae24e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in nilfs_detach_log_writer
2023/11/05 10:01 upstream aea6bf908d73 500bfdc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/11/03 23:49 upstream 8f6f76a6a29f 500bfdc4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in nilfs_detach_log_writer
2023/11/03 16:40 upstream 8f6f76a6a29f c4ac074c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/10/28 13:12 upstream 56567a20b22b 3c418d72 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/10/27 09:36 upstream 3a568e3a961b bf285f0c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/10/26 09:54 upstream 611da07b89fd 72e794c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in nilfs_detach_log_writer
2023/10/24 10:01 upstream e017769f4ce2 af8d2e46 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in nilfs_detach_log_writer
2023/10/12 13:27 upstream 401644852d0b 1b231e3c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/10/11 02:12 upstream 1c8b86a3799f 83165b57 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/10/05 17:33 upstream 3006adf3be79 db17ad9f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/10/04 11:39 upstream cbf3a2cb156a b7d7ff54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/10/01 15:27 upstream e402b08634b3 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in nilfs_detach_log_writer
2023/09/30 23:03 upstream 3b517966c561 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/09/29 12:08 upstream 9ed22ae6be81 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/09/29 07:52 upstream 9ed22ae6be81 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/09/10 10:43 upstream a3c57ab79a06 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in nilfs_detach_log_writer
2023/08/24 23:39 upstream 93f5de5f648d 49be837e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/08/23 03:05 upstream 53663f4103ff b81ca3f6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/08/16 22:36 upstream 4853c74bd7ab 74b106b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/08/14 18:39 upstream 2ccdd1b13c59 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/08/12 23:40 upstream ae545c3283dc 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/08/04 12:19 upstream c1a515d3c027 74621247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/08/04 03:39 upstream 7bafbd4027ae 74621247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/08/03 11:39 upstream ec351c8f2e62 39a91c18 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/08/01 22:48 upstream 5d0c230f1de8 df07ffe8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/07/28 00:36 upstream 57012c57536f 92476829 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in nilfs_detach_log_writer
2023/07/26 23:17 upstream 5f0bc0b042fc 41fe1bae .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/07/25 20:34 upstream 0b5547c51827 6756545c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/07/25 07:33 upstream 20ea1e7d13c1 b03242d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/07/23 10:14 upstream 295e1388de2d 27cbe77f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/07/21 08:21 upstream 57f1f9dd3abe 28847498 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/07/12 07:01 upstream 3f01e9fed845 2f19aa4f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/07/05 23:40 upstream d528014517f2 ba5dba36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in nilfs_detach_log_writer
2023/10/30 03:12 linux-next 66f1e1ea3548 3c418d72 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in nilfs_detach_log_writer
2024/04/06 22:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in nilfs_detach_log_writer
2024/04/01 21:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in nilfs_detach_log_writer
* Struck through repros no longer work on HEAD.