INFO: task jbd2/sda1-8:2803 blocked for more than 143 seconds.
Not tainted 6.16.0-rc4-syzkaller-00324-gf72b9aa821a2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D
stack:25912 pid:2803 tgid:2803 ppid:2 task_flags:0x240040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x132a/0x3b10 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6878
io_schedule+0xbf/0x130 kernel/sched/core.c:7723
bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:247
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
__wait_on_buffer+0x64/0x70 fs/buffer.c:123
wait_on_buffer include/linux/buffer_head.h:422 [inline]
journal_wait_on_commit_record fs/jbd2/commit.c:171 [inline]
jbd2_journal_commit_transaction+0x4a88/0x68f0 fs/jbd2/commit.c:881
kjournald2+0x1f4/0x760 fs/jbd2/journal.c:201
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5b3/0x6c0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff890c7ec0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff890c7ec0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff890c7ec0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6770
5 locks held by kworker/1:2/1076:
2 locks held by getty/2904:
#0:
ffff88811234a0a0
(&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1:
ffffc900000432f0
(&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
5 locks held by kworker/1:3/5228:
1 lock held by udevd/5239:
#0:
ffff888100ac4988
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
4 locks held by udevd/5511:
#0:
ffff88813a19a668
(
&p->lock){+.+.}-{4:4}
, at: seq_read_iter+0xe1/0x12c0 fs/seq_file.c:182
#1:
ffff888118c54488
(
&of->mutex#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2:
ffff8881136142d8 (
kn->active#23
){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3:
ffff888129331198
(
&dev->mutex){....}-{4:4}
, at: device_lock_interruptible include/linux/device.h:889 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
4 locks held by kworker/1:6/5578:
1 lock held by udevd/7097:
#0:
ffff888100ac4988
(&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by syz-executor/15955:
#0:
ffff888100ac4988
(
&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1162
1 lock held by syz-executor/16596:
#0: ffff888100ac4988
(&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1162
1 lock held by syz-executor/17187:
#0:
ffff888100ac4988
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1162
1 lock held by syz-executor/17849:
#0:
ffff888100ac4988
(
&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1162
8 locks held by kworker/1:0/18354:
1 lock held by syz-executor/18477:
#0: ffff888100ac4988
(&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1162
1 lock held by syz-executor/25733:
#0: ffff888100ac4988
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by syz-executor/25734:
#0:
ffff888100ac4988
(
&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by syz-executor/25735:
#0: ffff888100ac4988
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by syz-executor/25736:
#0:
ffff888100ac4988
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
6 locks held by syz-executor/25738:
#0:
ffff888119a28400
(sb_writers
#10
){.+.+}-{0:0}
, at: ksys_write+0x12a/0x250 fs/read_write.c:738
#1:
ffff888123f0a088 (
&of->mutex){+.+.}-{4:4}
, at: kernfs_fop_write_iter+0x28f/0x510 fs/kernfs/file.c:325
#2:
ffffffff89120b88
(
cgroup_mutex
){+.+.}-{4:4}
, at: cgroup_lock include/linux/cgroup.h:387 [inline]
, at: cgroup_kn_lock_live+0x116/0x520 kernel/cgroup/cgroup.c:1686
#3:
ffffffff88f73030
(cpu_hotplug_lock
){++++}-{0:0}
, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2480 [inline]
, at: cgroup_procs_write_start+0x18e/0x660 kernel/cgroup/cgroup.c:2984
#4:
ffffffff89120890
(
cgroup_threadgroup_rwsem){++++}-{0:0}
, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2482 [inline]
, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2478 [inline]
, at: cgroup_procs_write_start+0x19a/0x660 kernel/cgroup/cgroup.c:2984
#5:
ffffffff890d34b8
(
rcu_state.exp_mutex
){+.+.}-{4:4}
, at: exp_funnel_lock+0x284/0x3c0 kernel/rcu/tree_exp.h:304
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.16.0-rc4-syzkaller-00324-gf72b9aa821a2 #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xf70/0x12c0 kernel/hung_task.c:470
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5b3/0x6c0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
imon 2-1:155.0: imon usb_rx_callback_intf0: status(-71): ignored
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 18354 Comm: kworker/1:0 Not tainted 6.16.0-rc4-syzkaller-00324-gf72b9aa821a2 #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events free_obj_work
RIP: 0010:mark_lock+0x7a/0x610 kernel/locking/lockdep.c:4735
Code: ff 1f 0f b7 c0 48 0f a3 05 23 f0 16 0d 0f 83 86 00 00 00 48 8d 04 80 48 8d 04 80 48 8d 04 c5 60 40 71 8e 4c 89 ea 48 23 50 60 01 00 00 00 74 7f 48 8b 54 24 68 65 48 2b 15 9a 93 11 0b 0f 85
RSP: 0018:ffffc900001a8440 EFLAGS: 00000002
RAX: ffffffff8e714a88 RBX: 0000000000000004 RCX: 0000000000000004
RDX: 0000000000000010 RSI: ffff888111b18b70 RDI: ffff888111b18000
RBP: ffffc900001a84d8 R08: 0000000000000001 R09: 0000000000000001
R10: 00000000000000c8 R11: 0000000000000001 R12: ffff888111b18b70
R13: 0000000000000010 R14: 0000000000000005 R15: ffff888111b18000
FS: 0000000000000000(0000) GS:ffff888269262000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3876e6 CR3: 0000000008ea4000 CR4: 00000000003506f0
Call Trace:
mark_usage kernel/locking/lockdep.c:4645 [inline]
__lock_acquire+0x8a5/0x1c90 kernel/locking/lockdep.c:5194
lock_acquire kernel/locking/lockdep.c:5871 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
console_lock_spinning_enable+0x6d/0xd0 kernel/printk/printk.c:1918
console_emit_next_record kernel/printk/printk.c:3132 [inline]
console_flush_all+0x7aa/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
dev_vprintk_emit drivers/base/core.c:4917 [inline]
dev_printk_emit+0xfa/0x140 drivers/base/core.c:4928
__dev_printk+0xf5/0x270 drivers/base/core.c:4940
_dev_warn+0xe4/0x120 drivers/base/core.c:4984
usb_rx_callback_intf0+0x11c/0x1a0 drivers/media/rc/imon.c:1768
__usb_hcd_giveback_urb+0x38a/0x6e0 drivers/usb/core/hcd.c:1663
usb_hcd_giveback_urb+0x39b/0x450 drivers/usb/core/hcd.c:1747
dummy_timer+0x1814/0x3a30 drivers/usb/gadget/udc/dummy_hcd.c:1995
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x1ff/0xad0 kernel/time/hrtimer.c:1825
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1842
handle_softirqs+0x208/0x8d0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5875
Code: 66 11 0b 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 c2 67 20 09 0f 82 74 02 00 00 8b 35 ea 75 20 09 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 d9 65 11 0b 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc90012f976a0 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff890c7ec0 RCX: 00000000a659f7da
RDX: 0000000000000000 RSI: ffffffff88ae4770 RDI: ffffffff876903c0
RBP: 0000000000000002 R08: 6f2de1b07b132a19 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
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+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x37/0x50 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kmem_cache_free+0x2a0/0x470 mm/slub.c:4745
free_object_list.isra.0+0xf8/0x2a0 lib/debugobjects.c:326
free_obj_work+0x18c/0x390 lib/debugobjects.c:513
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5b3/0x6c0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245