INFO: task bch-reclaim/loo:5632 blocked for more than 143 seconds.
Not tainted 6.11.0-syzkaller-10547-g684a64bf32b6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-reclaim/loo state:D stack:26648 pid:5632 tgid:5632 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
bch2_journal_reclaim_thread+0x167/0x560 fs/bcachefs/journal_reclaim.c:739
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6701
5 locks held by kworker/u8:5/731:
2 locks held by getty/4966:
#0: ffff888032a6a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
4 locks held by syz-executor/5218:
3 locks held by kworker/1:4/5271:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffff8880b8728948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:989
#2: ffff88802ac60538 (&idev->mc_lock){+.+.}-{3:3}, at: mld_dad_work+0x3c/0x500 net/ipv6/mcast.c:2259
3 locks held by kworker/1:5/5299:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90003e7fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90003e7fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffff88805de3c240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1489
1 lock held by bch-reclaim/loo/5632:
#0: ffff88805c1cb0a8 (&j->reclaim_lock){+.+.}-{3:3}, at: bch2_journal_reclaim_thread+0x167/0x560 fs/bcachefs/journal_reclaim.c:739
1 lock held by syz.2.85/6104:
#0: ffff88823bee60e0 (&type->s_umount_key#80){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88823bee60e0 (&type->s_umount_key#80){++++}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
1 lock held by syz.4.70/6176:
#0: ffff88823bee60e0 (&type->s_umount_key#80){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88823bee60e0 (&type->s_umount_key#80){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.4.70/6194:
#0: ffff88823bee60e0 (&type->s_umount_key#80){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88823bee60e0 (&type->s_umount_key#80){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.3.129/6681:
#0: ffff88823bee60e0 (&type->s_umount_key#80){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88823bee60e0 (&type->s_umount_key#80){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz-executor/6719:
#0: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#0: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
1 lock held by syz-executor/6786:
#0: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#0: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
1 lock held by syz.2.155/6793:
#0: ffff88823bee60e0 (&type->s_umount_key#80){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88823bee60e0 (&type->s_umount_key#80){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-10547-g684a64bf32b6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 7032 Comm: dhcpcd-run-hook Not tainted 6.11.0-syzkaller-10547-g684a64bf32b6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:lookup_object lib/debugobjects.c:195 [inline]
RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:564 [inline]
RIP: 0010:debug_object_activate+0x1b0/0x510 lib/debugobjects.c:710
Code: 41 fd 4c 89 7c 24 30 4d 8b 3f 45 31 e4 eb 06 4d 8b 3f 41 ff c4 4d 85 ff 74 40 49 8d 5f 18 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 26 d5 41 fd 48 8b 44 24 10 48 39 03 0f 84 1a 01
RSP: 0018:ffffc9000348f580 EFLAGS: 00000046
RAX: 1ffff110097b8345 RBX: ffff88804bdc1a28 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc9000348f460
RBP: ffffc9000348f690 R08: 0000000000000003 R09: fffff52000691e8c
R10: dffffc0000000000 R11: fffff52000691e8c R12: 0000000000000001
R13: 1ffff92000691eb8 R14: dffffc0000000000 R15: ffff88804bdc1a10
FS: 00007fc96e30b380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd399129ac CR3: 0000000029710000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline]
__call_rcu_common kernel/rcu/tree.c:3071 [inline]
call_rcu+0x97/0xa70 kernel/rcu/tree.c:3190
__dentry_kill+0x497/0x630 fs/dcache.c:634
dput+0x19f/0x2b0 fs/dcache.c:857
handle_mounts fs/namei.c:1579 [inline]
step_into+0x44f/0x1080 fs/namei.c:1891
lookup_last fs/namei.c:2556 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2580
filename_lookup+0x256/0x610 fs/namei.c:2609
vfs_statx+0x103/0x490 fs/stat.c:312
vfs_fstatat+0x145/0x190 fs/stat.c:341
__do_sys_newfstatat fs/stat.c:505 [inline]
__se_sys_newfstatat fs/stat.c:499 [inline]
__x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc96e45f5f4
Code: 64 c7 00 09 00 00 00 83 c8 ff c3 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 00 00 00 00 41 89 ca b8 06 01 00 00 0f 05 <45> 31 c0 3d 00 f0 ff ff 76 10 48 8b 15 03 a8 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffd39913c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fc96e45f5f4
RDX: 00007ffd39913c68 RSI: 000055ce4fceaf60 RDI: 00000000ffffff9c
RBP: 000055ce4fce4040 R08: 0000000000000028 R09: 3c00000000001001
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc96e5e32ba
R13: 0000000000000000 R14: 00007ffd39913f58 R15: 0000000000000000