INFO: task syz-executor:9551 blocked for more than 143 seconds.
Not tainted 6.12.0-rc1-syzkaller-00330-gfc20a3e57247 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20992 pid:9551 tgid:9551 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: 0033:0x7f48dad7f327
RSP: 002b:00007ffc899c18d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f48dad7f327
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc899c1990
RBP: 00007ffc899c1990 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc899c2a10
R13: 00007f48dadf0134 R14: 000000000005fed0 R15: 00007ffc899c2a50
INFO: task syz-executor:10137 blocked for more than 144 seconds.
Not tainted 6.12.0-rc1-syzkaller-00330-gfc20a3e57247 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20592 pid:10137 tgid:10137 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: 0033:0x7f3ae9f7dff9
RSP: 002b:00007ffd0788e618 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f3ae9ff0159 RCX: 00007f3ae9f7dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000000000000d R08: 00007ffd0788c3b6 R09: 00007ffd0788f8d0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd0788f8d0
R13: 00007f3ae9ff0134 R14: 000000000005ef38 R15: 00007ffd07890990
Showing all locks held in the system:
3 locks held by kworker/u8:1/12:
#0: ffff8880b863ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:593
#1: ffff8880b8628948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
#2: ffff8880504a0768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:6014 [inline]
#2: ffff8880504a0768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_wiphy_work+0xd9/0x490 net/wireless/core.c:426
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
10 locks held by kworker/u8:6/1070:
3 locks held by kworker/u8:8/3055:
#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: ffffc90009987d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90009987d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2:
ffffffff8fcbf548 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
2 locks held by getty/4973:
#0: ffff88802e82c0a0 (&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/0:7/5303:
3 locks held by kworker/u8:11/9347:
1 lock held by syz-executor/9551:
#0: ffff88807827a0e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807827a0e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807827a0e0 (&type->s_umount_key#31){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz-executor/10137:
#0: ffff888053ca80e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888053ca80e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888053ca80e0 (&type->s_umount_key#75){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz-executor/10693:
#0: ffff8880309be0e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880309be0e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880309be0e0 (&type->s_umount_key#75){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz-executor/10902:
#0: ffff8880247a60e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880247a60e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880247a60e0 (&type->s_umount_key#31){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz.4.514/11194:
#0: ffff888053ca80e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888053ca80e0 (&type->s_umount_key#75){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.1.528/11226:
#0: ffff888053ca80e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888053ca80e0 (&type->s_umount_key#75){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.0.542/11577:
#0: ffff8880247a60e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880247a60e0 (&type->s_umount_key#31){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.4.544/11593:
#0: ffff888053ca80e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888053ca80e0 (&type->s_umount_key#75){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.1.554/11675:
#0: ffff88807827a0e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807827a0e0 (&type->s_umount_key#31){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz-executor/12641:
#0: ffffffff8e93d240 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4562
2 locks held by syz-executor/12737:
#0: ffffffff8fcbf548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcbf548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643
#1: ffffffff8e93d378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#1: ffffffff8e93d378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
2 locks held by syz-executor/12771:
#0: ffffffff8fcb2a50 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490
#1: ffffffff8e93d240 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4562
2 locks held by sed/12812:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00330-gfc20a3e57247 #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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 1070 Comm: kworker/u8:6 Not tainted 6.12.0-rc1-syzkaller-00330-gfc20a3e57247 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound quota_release_workfn
RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:406
Code: 20 fb 53 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 51 89 ba fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c
RSP: 0018:ffffc90003db7078 EFLAGS: 00000002
RAX: 1ffffffff34db900 RBX: ffffffff9a6dcc00 RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: ffffffff8540daf6 R09: 1ffff1100497a046
R10: dffffc0000000000 R11: ffffffff8540dab0 R12: dffffc0000000000
R13: ffffffff9a3d7ef0 R14: 00000000000003fd R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055afad013950 CR3: 000000007d356000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:137 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:159 [inline]
wait_for_lsr drivers/tty/serial/8250/8250_port.c:2068 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3315 [inline]
serial8250_console_write+0x1373/0x1ed0 drivers/tty/serial/8250/8250_port.c:3393
console_emit_next_record kernel/printk/printk.c:3092 [inline]
console_flush_all+0x869/0xeb0 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
__mlog_printk+0x281/0x2b0 fs/ocfs2/cluster/masklog.c:77
ocfs2_start_trans+0x59e/0x700 fs/ocfs2/journal.c:357
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