INFO: task syz-executor:5835 blocked for more than 143 seconds.
Not tainted 6.15.0-rc1-next-20250409-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20552 pid:5835 tgid:5835 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b9a/0x5250 kernel/sched/core.c:6769
__schedule_loop kernel/sched/core.c:6847 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6862
schedule_timeout+0xb1/0x2b0 kernel/time/sleep_timeout.c:75
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+0x32f/0x600 kernel/sched/completion.c:148
__flush_work+0xa48/0xc60 kernel/workqueue.c:4244
flush_work kernel/workqueue.c:4265 [inline]
flush_delayed_work+0x16a/0x1c0 kernel/workqueue.c:4287
dquot_writeback_dquots+0xf5/0xb00 fs/quota/dquot.c:691
ext4_sync_fs+0x261/0x790 fs/ext4/super.c:6348
sync_filesystem+0xed/0x230 fs/sync.c:56
generic_shutdown_super+0x72/0x2d0 fs/super.c:622
kill_block_super+0x44/0x90 fs/super.c:1760
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7393
deactivate_locked_super+0xc4/0x130 fs/super.c:474
cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
task_work_run+0x251/0x310 kernel/task_work.c:227
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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2b1b38e497
RSP: 002b:00007ffec8ddd3f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f2b1b40e51c RCX: 00007f2b1b38e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffec8ddd4b0
RBP: 00007ffec8ddd4b0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffec8dde540
R13: 00007f2b1b40e51c R14: 000000000001ed84 R15: 00007ffec8dde580
INFO: task syz-executor:5841 blocked for more than 144 seconds.
Not tainted 6.15.0-rc1-next-20250409-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20376 pid:5841 tgid:5841 ppid:1 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b9a/0x5250 kernel/sched/core.c:6769
__schedule_loop kernel/sched/core.c:6847 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6862
schedule_timeout+0xb1/0x2b0 kernel/time/sleep_timeout.c:75
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+0x32f/0x600 kernel/sched/completion.c:148
__flush_work+0xa48/0xc60 kernel/workqueue.c:4244
flush_work kernel/workqueue.c:4265 [inline]
flush_delayed_work+0x16a/0x1c0 kernel/workqueue.c:4287
invalidate_dquots fs/quota/dquot.c:576 [inline]
dquot_disable+0x76a/0x1cf0 fs/quota/dquot.c:2296
ocfs2_disable_quotas+0xf3/0x210 fs/ocfs2/super.c:967
ocfs2_dismount_volume+0x1bf/0x910 fs/ocfs2/super.c:1815
generic_shutdown_super+0x139/0x2d0 fs/super.c:643
kill_block_super+0x44/0x90 fs/super.c:1760
deactivate_locked_super+0xc4/0x130 fs/super.c:474
cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
task_work_run+0x251/0x310 kernel/task_work.c:227
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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4cd8b8e497
RSP: 002b:00007ffe94ecc788 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f4cd8c0e51c RCX: 00007f4cd8b8e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe94ecc840
RBP: 00007ffe94ecc840 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe94ecd8d0
R13: 00007f4cd8c0e51c R14: 000000000001e084 R15: 00007ffe94ecd910
INFO: task syz-executor:5847 blocked for more than 144 seconds.
Not tainted 6.15.0-rc1-next-20250409-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20056 pid:5847 tgid:5847 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b9a/0x5250 kernel/sched/core.c:6769
__schedule_loop kernel/sched/core.c:6847 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6862
schedule_timeout+0xb1/0x2b0 kernel/time/sleep_timeout.c:75
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+0x32f/0x600 kernel/sched/completion.c:148
__flush_work+0xa48/0xc60 kernel/workqueue.c:4244
flush_work kernel/workqueue.c:4265 [inline]
flush_delayed_work+0x16a/0x1c0 kernel/workqueue.c:4287
dquot_writeback_dquots+0xf5/0xb00 fs/quota/dquot.c:691
ext4_sync_fs+0x261/0x790 fs/ext4/super.c:6348
sync_filesystem+0xed/0x230 fs/sync.c:56
generic_shutdown_super+0x72/0x2d0 fs/super.c:622
kill_block_super+0x44/0x90 fs/super.c:1760
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7393
deactivate_locked_super+0xc4/0x130 fs/super.c:474
cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
task_work_run+0x251/0x310 kernel/task_work.c:227
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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fef3cd8e497
RSP: 002b:00007ffea2a4e628 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fef3ce0e51c RCX: 00007fef3cd8e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffea2a4e6e0
RBP: 00007ffea2a4e6e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffea2a4f770
R13: 00007fef3ce0e51c R14: 000000000001ed70 R15: 00007ffea2a4f7b0
INFO: task syz-executor:5852 blocked for more than 146 seconds.
Not tainted 6.15.0-rc1-next-20250409-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20872 pid:5852 tgid:5852 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b9a/0x5250 kernel/sched/core.c:6769
__schedule_loop kernel/sched/core.c:6847 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6862
schedule_timeout+0xb1/0x2b0 kernel/time/sleep_timeout.c:75
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+0x32f/0x600 kernel/sched/completion.c:148
__flush_work+0xa48/0xc60 kernel/workqueue.c:4244
flush_work kernel/workqueue.c:4265 [inline]
flush_delayed_work+0x16a/0x1c0 kernel/workqueue.c:4287
dquot_writeback_dquots+0xf5/0xb00 fs/quota/dquot.c:691
ext4_sync_fs+0x261/0x790 fs/ext4/super.c:6348
sync_filesystem+0xed/0x230 fs/sync.c:56
generic_shutdown_super+0x72/0x2d0 fs/super.c:622
kill_block_super+0x44/0x90 fs/super.c:1760
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7393
deactivate_locked_super+0xc4/0x130 fs/super.c:474
cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
task_work_run+0x251/0x310 kernel/task_work.c:227
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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd44458e497
RSP: 002b:00007ffd0770ce78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fd44460e51c RCX: 00007fd44458e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd0770cf30
RBP: 00007ffd0770cf30 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd0770dfc0
R13: 00007fd44460e51c R14: 000000000001fa15 R15: 00007ffd0770e000
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8ed3f200 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ed3f200 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ed3f200 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
5 locks held by kworker/u8:4/67:
5 locks held by kworker/u8:5/1037:
#0: ffff8880b8639f18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
#1: ffff8880b8623f08
(
&per_cpu_ptr(group->pcpu, cpu)->seq
){-.-.}-{0:0}, at: psi_task_switch+0x41f/0x7a0 kernel/sched/psi.c:987
#2: ffff8880b8625958 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1046 [inline]
#2: ffff8880b8625958 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x24c/0x10f0 kernel/time/timer.c:1127
#3: ffffffff9a986c60 (
&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x190/0x5c0 lib/debugobjects.c:818
#4: ffffffff8ed3f200 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#4: ffffffff8ed3f200 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#4: ffffffff8ed3f200 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
#4: ffffffff8ed3f200 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xb8/0x23b0 arch/x86/kernel/unwind_orc.c:479
2 locks held by getty/5584:
#0: ffff8880318e60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036db2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/5835:
#0: ffff8880323560e0 (
&type->s_umount_key
#31
){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
1 lock held by syz-executor/5839:
#0: ffff88804876e0e0 (&type->s_umount_key#66){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88804876e0e0 (&type->s_umount_key#66){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88804876e0e0 (&type->s_umount_key#66){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
1 lock held by syz-executor/5841:
#0: ffff88807c3120e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88807c3120e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88807c3120e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
1 lock held by syz-executor/5847:
#0: ffff8880566f80e0
(&type->s_umount_key#31){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
(&type->s_umount_key#31){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
(&type->s_umount_key#31){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
1 lock held by syz-executor/5852:
#0: ffff88807a5400e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88807a5400e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88807a5400e0 (&type->s_umount_key#31){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
1 lock held by syz-executor/6636:
#0: ffff8880531c80e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880531c80e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880531c80e0 (&type->s_umount_key#31){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
1 lock held by syz-executor/6653:
#0:
ffff8880305640e0 (
&type->s_umount_key
#31){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#31){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#31){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
1 lock held by syz-executor/6655:
#0: ffff8880449a80e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880449a80e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880449a80e0 (&type->s_umount_key#31){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
1 lock held by syz-executor/6681:
#0: ffff888032b560e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff888032b560e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff888032b560e0 (&type->s_umount_key#31){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:506
1 lock held by syz-executor/6748:
#0: ffff8880319fc0e0 (&type->s_umount_key#31){++++}-{4:4}
, at: __super_lock fs/super.c:57 [inline]
, at: __super_lock_excl fs/super.c:72 [inline]
, at: deactivate_super+0xb5/0xf0 fs/super.c:506
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc1-next-20250409-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:437
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 67 Comm: kworker/u8:4 Not tainted 6.15.0-rc1-next-20250409-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound quota_release_workfn
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x26/0xb0 kernel/rcu/tree.c:736
Code: 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 00 fe c0 11 e8 cb 2e 8a 0a 89 c3 83 f8 08 73 7a 49 bf 00 00 00 00 00 fc ff df <4c> 8d 34 dd 60 6c 7a 8e 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08
RSP: 0018:ffffc90000a08548 EFLAGS: 00000097
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffffffff8ca1e6a0 RDI: ffffffff8ca1e660
RBP: ffffffff9369f020 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90000a08710 R11: ffffffff81af24b0 R12: 0000000000000000
R13: 0000000000000002 R14: ffffffff83e07715 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888125081000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005639c8f89ab8 CR3: 0000000078342000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_lock_acquire include/trace/events/lock.h:24 [inline]
lock_acquire+0x5e/0x2f0 kernel/locking/lockdep.c:5829
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0xd5/0x23b0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xbf/0xd0 mm/kasan/generic.c:548
insert_work+0x3e/0x330 kernel/workqueue.c:2183
__queue_work+0xc6b/0x10a0 kernel/workqueue.c:2345
call_timer_fn+0x189/0x650 kernel/time/timer.c:1789
expire_timers kernel/time/timer.c:1835 [inline]
__run_timers kernel/time/timer.c:2414 [inline]
__run_timer_base+0x699/0x8e0 kernel/time/timer.c:2426
run_timer_base kernel/time/timer.c:2435 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445
handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline]
RIP: 0010:vprintk_emit+0x731/0xa40 kernel/printk/printk.c:2449
Code: 00 e8 b3 39 21 00 4c 8d bc 24 a0 00 00 00 4d 85 e4 75 07 e8 a1 39 21 00 eb 06 e8 9a 39 21 00 fb 49 bc 00 00 00 00 00 fc ff df <48> c7 c7 00 ad c1 8e 31 f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00
RSP: 0018:ffffc90001577260 EFLAGS: 00000293
RAX: ffffffff81a25a16 RBX: 0000000000000000 RCX: ffff8880226d5a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001577370 R08: ffffffff81a259ef R09: 1ffffffff20c074e
R10: dffffc0000000000 R11: fffffbfff20c074f R12: dffffc0000000000
R13: 1ffff920002aee50 R14: ffffffff81a25842 R15: ffffc90001577300
_printk+0xd5/0x120 kernel/printk/printk.c:2475
__mlog_printk+0x285/0x2b0 fs/ocfs2/cluster/masklog.c:77
ocfs2_assign_bh fs/ocfs2/dlmglue.c:2417 [inline]
ocfs2_inode_lock_full_nested+0x871/0x1be0 fs/ocfs2/dlmglue.c:2510
ocfs2_lock_global_qf+0xdc/0x2c0 fs/ocfs2/quota_global.c:303
ocfs2_release_dquot+0x3ca/0xc70 fs/ocfs2/quota_global.c:758
quota_release_workfn+0x3a1/0x650 fs/quota/dquot.c:840
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245