INFO: task syz-executor:5662 blocked for more than 143 seconds.
Not tainted 6.12.0-rc1-syzkaller-00042-gf23aa4c0761a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:20608 pid:5662 tgid:5662 ppid:1 flags:0x00004002
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_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: 0033:0x7fbc2d37dff9
RSP: 002b:00007ffc634df698 EFLAGS: 00000246
ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fbc2d3f0159 RCX: 00007fbc2d37dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000000000000d R08: 00007ffc634dd436 R09: 00007ffc634e0950
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc634e0950
R13: 00007fbc2d3f0134 R14: 000000000001fa0f R15: 00007ffc634e1a10
INFO: task syz-executor:5735 blocked for more than 145 seconds.
Not tainted 6.12.0-rc1-syzkaller-00042-gf23aa4c0761a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:20992 pid:5735 tgid:5735 ppid:1 flags:0x00004006
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_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
ext4_quota_off+0xf2/0x540 fs/ext4/super.c:7121
ext4_quotas_off fs/ext4/super.c:1185 [inline]
ext4_put_super+0xee/0xd50 fs/ext4/super.c:1300
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
kill_block_super+0x44/0x90 fs/super.c:1696
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7320
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
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f664a97f327
RSP: 002b:00007ffe1b5b6318 EFLAGS: 00000246
ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f664a97f327
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe1b5b63d0
RBP: 00007ffe1b5b63d0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe1b5b7450
R13: 00007f664a9f0134 R14: 0000000000021e69 R15: 00007ffe1b5b7490
Showing all locks held in the system:
10 locks held by kworker/u8:1/12:
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
3 locks held by kworker/1:1/46:
#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:
ffffc90000b67d00
(
free_ipc_work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2:
ffffffff8e93d378
(rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
(rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
3 locks held by kworker/0:2/937:
2 locks held by kworker/u8:6/1595:
2 locks held by getty/4986:
#0: ffff88802dff40a0 (&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
3 locks held by kworker/0:5/5272:
1 lock held by syz-executor/5662:
#0: ffff88802f78a0e0 (&type->s_umount_key#54){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88802f78a0e0 (&type->s_umount_key#54){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88802f78a0e0 (&type->s_umount_key#54){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz-executor/5735:
#0: ffff88805eeb20e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805eeb20e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88805eeb20e0 (&type->s_umount_key#31){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz-executor/5949:
#0: ffff8880680ce0e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880680ce0e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880680ce0e0 (&type->s_umount_key#31){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz.3.104/6154:
#0: ffff88802f78a0e0 (&type->s_umount_key#54){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88802f78a0e0 (&type->s_umount_key#54){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
2 locks held by syz-executor/6243:
1 lock held by syz-executor/6326:
#0: ffff88806cd1a0e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806cd1a0e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806cd1a0e0 (&type->s_umount_key#31){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
3 locks held by syz-executor/6733:
#0: ffff88807d9f8d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline]
#0: ffff88807d9f8d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2698
#1: ffff88807d9f8078 (
&hdev->lock){+.+.}-{3:3}
, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5183
#2: ffffffff8fe2ba68 (hci_cb_list_lock){+.+.}-{3:3}
, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1972 [inline]
, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2589
1 lock held by syz.0.183/6762:
#0:
ffff88802f78a0e0
(&type->s_umount_key
#54
){++++}-{3:3}
, at: __super_lock fs/super.c:58 [inline]
, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.2.192/6811:
#0: ffff88805eeb20e0
(
&type->s_umount_key
#31
){++++}-{3:3}
, at: __super_lock fs/super.c:58 [inline]
, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz-executor/6826:
#0:
ffffffff8e93d240
(
rcu_state.barrier_mutex
){+.+.}-{3:3}
, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4561
3 locks held by syz-executor/6877:
#0:
ffff888047ee0d80
(
&hdev->req_lock
){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline]
){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2698
#1: ffff888047ee0078
(
&hdev->lock
){+.+.}-{3:3}
, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5183
#2: ffffffff8fe2ba68 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1972 [inline]
#2: ffffffff8fe2ba68 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2589
1 lock held by syz.4.252/7147:
#0:
ffffffff8e93d378
(
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00042-gf23aa4c0761a #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: 12 Comm: kworker/u8:1 Not tainted 6.12.0-rc1-syzkaller-00042-gf23aa4c0761a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound quota_release_workfn
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:142 [inline]
RIP: 0010:lock_acquire+0x1b7/0x550 kernel/locking/lockdep.c:5826
Code: 08 4c 89 ff e8 fa 23 8b 00 48 8d 5c 24 60 4c 8b bc 24 80 00 00 00 fa 48 c7 c7 a0 d7 0a 8c e8 10 80 4c 0a 65 ff 05 19 45 92 7e <45> 31 c9 41 f7 c7 00 02 00 00 41 0f 94 c1 48 8b 7c 24 20 44 89 f6
RSP: 0018:ffffc90000117160 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffffc900001171c0 RCX: ffffffff81704484
RDX: 0000000000000000 RSI: ffffffff8c0ad7a0 RDI: ffffffff8c602460
RBP: ffffc900001172a8 R08: ffffffff901bb9ef R09: 1ffffffff203773d
R10: dffffc0000000000 R11: fffffbfff203773e R12: 1ffff92000022e34
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000046
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f506a753440 CR3: 000000000e734000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
printk_legacy_allow_spinlock_enter kernel/printk/printk.c:3004 [inline]
console_emit_next_record kernel/printk/printk.c:3091 [inline]
console_flush_all+0x81b/0xeb0 kernel/printk/printk.c:3180
__console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3279
vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2407
_printk+0xd5/0x120 kernel/printk/printk.c:2432
__ocfs2_abort+0x13d/0x230 fs/ocfs2/super.c:2582
ocfs2_start_trans+0x621/0x700 fs/ocfs2/journal.c:360
ocfs2_release_dquot+0x474/0xc40 fs/ocfs2/quota_global.c:761
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