INFO: task jbd2/sda1-8:4937 blocked in I/O wait for more than 141 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D
stack:27096 pid:4937 tgid:4937 ppid:2 task_flags:0x240040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x125c/0x6730 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+0x72b/0xd50 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:
6 locks held by kworker/0:0/9:
#0:
ffff88802368d540
(
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1:
ffffc900000e7d08
(
(work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
#2:
ffff88802a98a1d8
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1102 [inline]
, at: hub_event+0x1bd/0x4af0 drivers/usb/core/hub.c:5899
#3:
ffff8880744d61d8
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1102 [inline]
, at: usb_disconnect+0x10a/0x9a0 drivers/usb/core/hub.c:2336
#4:
ffff88801c6c7aa0
(
&root->kernfs_supers_rwsem
){++++}-{4:4}
, at: kernfs_remove_by_name_ns+0x49/0x120 fs/kernfs/dir.c:1791
#5:
ffff88801c6c7980
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_remove_by_name_ns+0x51/0x120 fs/kernfs/dir.c:1792
2 locks held by kworker/1:0/24:
1 lock held by khungtaskd/30:
#0:
ffffffff8e7e60c0
(
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
6 locks held by kworker/1:1/53:
5 locks held by kworker/u8:4/57:
1 lock held by udevd/4975:
2 locks held by getty/5361:
#0:
ffff888036bdf0a0
(
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1:
ffffc900032332e8
(
&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x419/0x14e0 drivers/tty/n_tty.c:2211
1 lock held by udevd/5595:
1 lock held by udevd/5596:
1 lock held by udevd/5597:
1 lock held by udevd/5598:
1 lock held by udevd/5916:
1 lock held by udevd/5917:
3 locks held by kworker/1:3/5987:
3 locks held by kworker/1:4/5988:
1 lock held by syz-executor/6012:
1 lock held by syz-executor/6015:
1 lock held by syz-executor/6016:
1 lock held by syz-executor/6022:
1 lock held by syz-executor/6024:
4 locks held by kworker/1:5/6210:
#0:
ffff88802368d540
(
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1:
ffffc900036e7d08
(
(work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
#2:
ffff88802aa831d8
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1102 [inline]
, at: hub_event+0x1bd/0x4af0 drivers/usb/core/hub.c:5899
#3:
ffff88801c6c7980
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_add_one+0x38/0xaa0 fs/kernfs/dir.c:825
3 locks held by kworker/1:6/6215:
#0:
ffff88813fe6b140
(
(wq_completion)events
){+.+.}-{0:0}
, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1:
ffffc90002edfd08
(
key_gc_work
){+.+.}-{0:0}
, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
#2:
ffffffff8e7f1b68
(
rcu_state.exp_mutex
){+.+.}-{4:4}
, at: exp_funnel_lock+0x19e/0x3c0 kernel/rcu/tree_exp.h:343
5 locks held by kworker/1:7/6305:
1 lock held by syz-executor/7658:
1 lock held by syz-executor/7659:
1 lock held by syz-executor/7660:
1 lock held by syz-executor/7661:
1 lock held by syz-executor/7662:
1 lock held by dhcpcd/7670:
#0:
ffff8880748da4c0
(
&sb->s_type->i_mutex_key
#13
){+.+.}-{4:4}
, at: inode_lock include/linux/fs.h:1024 [inline]
, at: __sock_release+0x86/0x260 net/socket.c:709
2 locks held by dhcpcd/7671:
1 lock held by dhcpcd/7672:
1 lock held by dhcpcd/7673:
1 lock held by dhcpcd/7674:
1 lock held by dhcpcd/7675:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
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+0x72b/0xd50 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_irq_callback - urb status -71
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 53 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: wg-kex-wg2 wg_packet_handshake_receive_worker
RIP: 0010:write_comp_data+0x7/0x90 kernel/kcov.c:240
Code: 1f 84 00 00 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 8b 05 d9 17 0a 12 <49> 89 f8 49 89 f1 49 89 d2 65 48 8b 3d b0 17 0a 12 a9 00 01 ff 00
RSP: 0018:ffffc90000a08018 EFLAGS: 00000002
RAX: 0000000080000102 RBX: 0000000000000006 RCX: ffffffff8b981217
RDX: 0000000000000043 RSI: 0000000000000009 RDI: 0000000000000005
RBP: ffffc90000a080c0 R08: 0000000000000005 R09: 0000000000000009
R10: 0000000000000006 R11: 00000000001c0c50 R12: dffffc0000000000
R13: ffffffff8bb07d43 R14: ffffc90000a08150 R15: 0000000000000043
FS: 0000000000000000(0000) GS:ffff8881243e7000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34c13ff8 CR3: 000000005d327000 CR4: 00000000003526f0
Call Trace:
skip_atoi lib/vsprintf.c:184 [inline]
format_decode+0x767/0xdd0 lib/vsprintf.c:2729
vsnprintf+0x1c0/0x1300 lib/vsprintf.c:2887
sprintf+0xcc/0x100 lib/vsprintf.c:3112
print_caller kernel/printk/printk.c:1370 [inline]
info_print_prefix+0x146/0x350 kernel/printk/printk.c:1387
record_print_text+0x143/0x3c0 kernel/printk/printk.c:1434
printk_get_next_message+0x2d1/0x6c0 kernel/printk/printk.c:3072
console_emit_next_record kernel/printk/printk.c:3137 [inline]
console_flush_one_record+0x67c/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_irq_callback.cold+0x41/0xfd drivers/input/misc/yealink.c:409
__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+0x1ea/0x9b0 kernel/softirq.c:622
do_softirq kernel/softirq.c:523 [inline]
do_softirq+0xac/0xe0 kernel/softirq.c:510
__local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:450
local_bh_enable include/linux/bottom_half.h:33 [inline]
fpregs_unlock arch/x86/include/asm/fpu/api.h:77 [inline]
kernel_fpu_end arch/x86/kernel/fpu/core.c:506 [inline]
kernel_fpu_end+0x64/0x80 arch/x86/kernel/fpu/core.c:499
blake2s_compress+0x78/0xf0 lib/crypto/x86/blake2s.h:42
blake2s_update+0xef/0x320 lib/crypto/blake2s.c:119
hmac.constprop.0+0x24a/0x480 drivers/net/wireguard/noise.c:324
kdf.constprop.0+0x14d/0x280 drivers/net/wireguard/noise.c:367
mix_precomputed_dh drivers/net/wireguard/noise.c:426 [inline]
wg_noise_handshake_consume_initiation+0x4b9/0x860 drivers/net/wireguard/noise.c:623
wg_receive_handshake_packet+0x7b2/0xc20 drivers/net/wireguard/receive.c:144
wg_packet_handshake_receive_worker+0x15e/0x370 drivers/net/wireguard/receive.c:213
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+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245