INFO: task jbd2/sda1-8:2816 blocked in I/O wait for more than 149 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D
stack:25848 pid:2816 tgid:2816 ppid:2 task_flags:0x240040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1325/0x47d0 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7326
io_schedule+0x8a/0xf0 kernel/sched/core.c:8154
bit_wait_io+0xd/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xdc/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
__wait_on_buffer+0x64/0x70 fs/buffer.c:118
wait_on_buffer include/linux/buffer_head.h:422 [inline]
journal_wait_on_commit_record fs/jbd2/commit.c:170 [inline]
jbd2_journal_commit_transaction+0x4837/0x6700 fs/jbd2/commit.c:907
kjournald2+0x200/0x760 fs/jbd2/journal.c:199
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Showing all locks held in the system:
4 locks held by kworker/1:0/23:
1 lock held by khungtaskd/30:
#0:
ffffffff896e2b40
(
rcu_read_lock
){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:2/36:
#0:
ffff8881000ac140
(
(wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1:
ffffc90000267d18
(
(work_completion)(&sub_info->work)
){+.+.}-{0:0}
, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
2 locks held by getty/2917:
#0:
ffff8881093920a0
(&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1:
ffffc900000452e8
(
&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x419/0x14e0 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:2/5198:
#0:
ffff88810006b140
((wq_completion)events){+.+.}-{0:0}
, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1:
ffffc9000203fd18
(
free_ipc_work
){+.+.}-{0:0}
, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
#2:
ffffffff896ee5e8
(
rcu_state.exp_mutex
){+.+.}-{4:4}
, at: exp_funnel_lock+0x27f/0x3c0 kernel/rcu/tree_exp.h:311
1 lock held by udevd/5240:
3 locks held by kworker/0:4/5256:
#0: ffff8881056b2d40
(
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1:
ffffc900020efd18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
#2:
ffff888109fc41d8
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1102 [inline]
, at: hub_event+0x1bd/0x4af0 drivers/usb/core/hub.c:5902
3 locks held by kworker/0:6/5276:
2 locks held by kworker/1:5/5395:
2 locks held by kworker/u8:0/8532:
#0: ffff8881000ac140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1: ffffc9001407fd18
((work_completion)(&sub_info->work)){+.+.}-{0:0}
, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
2 locks held by kworker/1:4/9689:
5 locks held by kworker/1:7/9820:
2 locks held by kworker/u8:1/11302:
#0:
ffff8881000ac140
(
(wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1: ffffc90012e47d18 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
2 locks held by kworker/u8:3/14225:
2 locks held by kworker/1:2/14527:
3 locks held by kworker/1:3/15825:
2 locks held by syz-executor/15980:
1 lock held by syz-executor/15986:
2 locks held by kworker/u8:4/15987:
#0: ffff8881000ac140
(
(wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1: ffffc9001696fd18
((work_completion)(&sub_info->work)
){+.+.}-{0:0}
, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
2 locks held by kworker/u8:5/15995:
1 lock held by syz-executor/16290:
2 locks held by kworker/u8:6/16304:
2 locks held by kworker/u8:7/16310:
2 locks held by modprobe/16313:
2 locks held by modprobe/16844:
2 locks held by modprobe/16845:
2 locks held by modprobe/16848:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x21c/0x2a0 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xcb1/0x1030 kernel/hung_task.c:561
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
yealink 4-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15825 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events drain_vmap_area_work
RIP: 0010:io_serial_out+0x8f/0xb0 drivers/tty/serial/8250/8250_port.c:408
Code: 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 1c 66 03 5d 40 44 89 e8 89 da ee <5b> 5d 41 5c 41 5d e9 16 ed 52 04 e8 a1 f6 f0 fe eb a0 e8 2a f7 f0
RSP: 0018:ffffc900001a84b8 EFLAGS: 00000002
RAX: 0000000000000031 RBX: 00000000000003f8 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: ffffffff832b5a15 RDI: ffffffff94245da0
RBP: ffffffff94245d60 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000031 R14: ffffffff940868a2 R15: ffffffff832b59b0
FS: 0000000000000000(0000) GS:ffff88826873a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f65647914e8 CR3: 00000000094ac000 CR4: 00000000003506f0
Call Trace:
serial_port_out include/linux/serial_core.h:813 [inline]
serial8250_console_putchar drivers/tty/serial/8250/8250_port.c:3245 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3307 [inline]
serial8250_console_write+0xe2c/0x1a50 drivers/tty/serial/8250/8250_port.c:3385
console_emit_next_record kernel/printk/printk.c:3183 [inline]
console_flush_one_record+0x790/0xe50 kernel/printk/printk.c:3269
console_flush_all kernel/printk/printk.c:3343 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3413
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
dev_vprintk_emit+0x391/0x3e0 drivers/base/core.c:4996
dev_printk_emit+0xd2/0x10d drivers/base/core.c:5007
__dev_printk+0xcb/0x100 drivers/base/core.c:5019
_dev_err+0xef/0x127 drivers/base/core.c:5062
urb_ctl_callback.cold+0x41/0x8c drivers/input/misc/yealink.c:447
__usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657
usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741
dummy_timer+0xda1/0x36c0 drivers/usb/gadget/udc/dummy_hcd.c:2005
__run_hrtimer kernel/time/hrtimer.c:2032 [inline]
__hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2096
hrtimer_run_softirq+0x17d/0x2c0 kernel/time/hrtimer.c:2113
handle_softirqs+0x1dd/0x990 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x160/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:98 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:115 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:140 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline]
RIP: 0010:kasan_check_range+0x180/0x1e0 mm/kasan/generic.c:200
Code: ff ff ff 48 85 d2 74 98 48 01 ea eb 1a 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 83 c0 01 48 39 d0 0f 84 79 ff ff ff 80 38 00 <74> ee e9 57 ff ff ff b8 01 00 00 00 c3 cc cc cc cc 48 29 c3 48 89
RSP: 0018:ffffc90016a07898 EFLAGS: 00000246
RAX: ffffed102113de59 RBX: ffffed102113de5a RCX: ffffffff82215626
RDX: ffffed102113de5a RSI: 0000000000000004 RDI: ffff8881089ef2c8
RBP: ffffed102113de59 R08: 0000000000000000 R09: ffffed102113de59
R10: ffff8881089ef2cb R11: 0000000000000000 R12: ffff8881089ef280
R13: 0000000000000001 R14: 000000000014e308 R15: dffffc0000000000
instrument_atomic_read include/linux/instrumented.h:82 [inline]
atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
__page_table_check_zero+0x166/0x410 mm/page_table_check.c:142
page_table_check_free include/linux/page_table_check.h:46 [inline]
__free_pages_prepare mm/page_alloc.c:1407 [inline]
__free_frozen_pages+0x725/0xf50 mm/page_alloc.c:2950
kasan_depopulate_vmalloc_pte+0x5d/0x80 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3338 [inline]
apply_to_pmd_range mm/memory.c:3382 [inline]
apply_to_pud_range mm/memory.c:3418 [inline]
apply_to_p4d_range mm/memory.c:3454 [inline]
__apply_to_page_range+0xb1d/0x1520 mm/memory.c:3490
__kasan_release_vmalloc+0xd7/0xe0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2284 [inline]
purge_vmap_node+0x210/0xb40 mm/vmalloc.c:2306
__purge_vmap_area_lazy+0x90a/0xc00 mm/vmalloc.c:2396
drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2430
process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
process_scheduled_works kernel/workqueue.c:3405 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245