INFO: task syz-executor:5574 blocked for more than 143 seconds.
Not tainted 6.12.0-rc2-syzkaller-00307-g36c254515dc6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:20992 pid:5574 tgid:5574 ppid:1 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2591
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+0xa37/0xc50 kernel/workqueue.c:4217
flush_work kernel/workqueue.c:4238 [inline]
flush_delayed_work+0x169/0x1c0 kernel/workqueue.c:4260
invalidate_dquots fs/quota/dquot.c:577 [inline]
dquot_disable+0x7a7/0x1cd0 fs/quota/dquot.c:2295
ocfs2_disable_quotas+0xf3/0x210 fs/ocfs2/super.c:963
ocfs2_dismount_volume+0x1ad/0x8f0 fs/ocfs2/super.c:1870
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
kill_block_super+0x44/0x90 fs/super.c:1696
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
task_work_run+0x24f/0x310 kernel/task_work.c:228
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xa2f/0x28e0 kernel/exit.c:939
do_group_exit+0x207/0x2c0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1097
x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f8ad777dff9
RSP: 002b:00007ffcf3ebbc38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f8ad77f0159 RCX: 00007f8ad777dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000000000000d R08: 00007ffcf3eb99d6 R09: 00007ffcf3ebcef0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf3ebcef0
R13: 00007f8ad77f0134 R14: 0000000000019ca2 R15: 00007ffcf3ebdfb0
Showing all locks held in the system:
7 locks held by kworker/u8:0/11:
1 lock held by khungtaskd/30:
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by kworker/u8:4/81:
2 locks held by kworker/u8:7/2952:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90009e67d00 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90009e67d00 (connector_reaper_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
2 locks held by getty/4976:
#0:
ffff88802ea390a0 (&tty->ldisc_sem){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5574:
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
2 locks held by syz-executor/6051:
1 lock held by syz.4.95/6312:
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.2.129/6595:
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.3.137/6626:
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.1.158/6746:
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.2.142/6794:
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805f86e0e0 (&type->s_umount_key#73){++++}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
4 locks held by syz.4.252/7142:
1 lock held by syz.3.253/7145:
2 locks held by syz.2.255/7153:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-syzkaller-00307-g36c254515dc6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.12.0-rc2-syzkaller-00307-g36c254515dc6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound quota_release_workfn
RIP: 0010:debug_objects_fill_pool+0x5/0x9f0 lib/debugobjects.c:600
Code: fe ff ff 4c 89 e7 e8 8a 8b 41 fd e9 c2 fe ff ff e8 20 2d 03 07 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 01 00
RSP: 0000:ffffc900000074f0 EFLAGS: 00000246
RAX: ffffc90000007560 RBX: ffff88804ad5f8c8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000007588
RBP: ffffc90000007610 R08: ffffc90000007587 R09: 0000000000000000
R10: ffffc90000007560 R11: fffff52000000eb1 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88804ad5f8c8 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f35a8961000 CR3: 000000000e734000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__debug_object_init+0xa4/0x400 lib/debugobjects.c:627
debug_timer_init kernel/time/timer.c:831 [inline]
debug_init kernel/time/timer.c:879 [inline]
init_timer_key+0x38/0x310 kernel/time/timer.c:923
neigh_alloc net/core/neighbour.c:507 [inline]
___neigh_create+0x9ae/0x2470 net/core/neighbour.c:648
ip6_finish_output2+0x1700/0x1730 net/ipv6/ip6_output.c:132
ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:226
NF_HOOK include/linux/netfilter.h:314 [inline]
ndisc_send_skb+0xab2/0x1380 net/ipv6/ndisc.c:511
addrconf_rs_timer+0x371/0x670 net/ipv6/addrconf.c:4042
call_timer_fn+0x18e/0x650 kernel/time/timer.c:1794
expire_timers kernel/time/timer.c:1845 [inline]
__run_timers kernel/time/timer.c:2419 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430
run_timer_base kernel/time/timer.c:2439 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1037
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2042 [inline]
RIP: 0010:vprintk_emit+0x700/0xa10 kernel/printk/printk.c:2406
Code: 00 e8 84 c1 20 00 4c 8d bc 24 a0 00 00 00 4d 85 e4 75 07 e8 72 c1 20 00 eb 06 e8 6b c1 20 00 fb 49 bc 00 00 00 00 00 fc ff df <48> c7 c7 c0 33 81 8e 31 f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00
RSP: 0000:ffffc90000107600 EFLAGS: 00000293
RAX: ffffffff81742595 RBX: 0000000000000000 RCX: ffff88801beebc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000107710 R08: ffffffff8174256e R09: 1ffffffff285251f
R10: dffffc0000000000 R11: fffffbfff2852520 R12: dffffc0000000000
R13: 1ffff92000020ec4 R14: ffffffff817423d0 R15: ffffc900001076a0
_printk+0xd5/0x120 kernel/printk/printk.c:2432
__mlog_printk+0x281/0x2b0 fs/ocfs2/cluster/masklog.c:77
ocfs2_release_dquot+0x761/0xc40 fs/ocfs2/quota_global.c:795
quota_release_workfn+0x39f/0x650 fs/quota/dquot.c:839
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
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