INFO: task syz.3.3148:18817 blocked for more than 145 seconds.
Not tainted 6.16.0-rc7-syzkaller-00114-g327579671a9b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.3148 state:D stack:23584 pid:18817 tgid:18817 ppid:7858 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16fd/0x4cf0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_timeout+0x9a/0x270 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+0x2bf/0x5d0 kernel/sched/completion.c:148
__flush_work+0x9b9/0xbc0 kernel/workqueue.c:4246
__cancel_work_sync+0xbe/0x110 kernel/workqueue.c:4366
uhid_dev_destroy drivers/hid/uhid.c:584 [inline]
uhid_char_release+0xac/0x600 drivers/hid/uhid.c:662
__fput+0x44c/0xa70 fs/file_table.c:465
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f2798e9a9
RSP: 002b:00007fff0600cc48 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f7f27bb7ba0 RCX: 00007f7f2798e9a9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f7f27bb7ba0 R08: 00000000000000dc R09: 0000000c0600cf3f
R10: 00007f7f27bb7ac0 R11: 0000000000000246 R12: 0000000000145e7b
R13: 00007f7f27bb6080 R14: ffffffffffffffff R15: 00007fff0600cd60
Showing all locks held in the system:
1 lock held by rcu_tasks_trace/29:
#0: ffff8880b8639f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:614
1 lock held by khungtaskd/31:
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by getty/5602:
#0: ffff8880309a40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
3 locks held by kworker/0:5/5940:
2 locks held by syz.6.3628/20411:
#0: ffff888034b7e258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1667 [inline]
#0: ffff888034b7e258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_setsockopt+0x53d/0x12c0 net/packet/af_packet.c:3871
#1: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
#1: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730 kernel/rcu/tree_exp.h:998
1 lock held by syz.6.3628/20412:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller-00114-g327579671a9b #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/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+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5940 Comm: kworker/0:5 Not tainted 6.16.0-rc7-syzkaller-00114-g327579671a9b #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events uhid_device_add_worker
RIP: 0010:native_apic_msr_eoi+0xf/0x20 arch/x86/include/asm/apic.h:218
Code: f8 e9 20 f2 9e ff cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa b9 0b 08 00 00 31 c0 31 d2 0f 30 f7 f1 9e ff cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc90000007fc8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc900042cefb8 RCX: 000000000000080b
RDX: 0000000000000000 RSI: ffffffff8b87b940 RDI: ffffffff8be28dc0
RBP: 0000000000000000 R08: ffffffff8fa1ddf7 R09: 1ffffffff1f43bbe
R10: dffffc0000000000 R11: ffffc90000007ff8 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888125c23000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557fa675c8 CR3: 0000000075988000 CR4: 0000000000350ef0
Call Trace:
apic_eoi arch/x86/include/asm/apic.h:410 [inline]
__sysvec_apic_timer_interrupt+0x45/0x410 arch/x86/kernel/apic/apic.c:1054
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
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+0x58f/0x7a0 kernel/printk/printk.c:2449
Code: 85 32 01 00 00 e8 e1 23 1f 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 d0 23 1f 00 eb 06 e8 c9 23 1f 00 fb 48 c7 c7 60 33 13 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 19 37
RSP: 0018:ffffc900042cf060 EFLAGS: 00000293
RAX: ffffffff81a10317 RBX: ffffffff81a101d4 RCX: ffff88802fd75a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e133360
RBP: ffffc900042cf170 R08: ffffffff8fa1ddf7 R09: 1ffffffff1f43bbe
R10: dffffc0000000000 R11: fffffbfff1f43bbf R12: dffffc0000000000
R13: 1ffff92000859e10 R14: 0000000000000200 R15: 000000000000003e
dev_vprintk_emit+0x337/0x3f0 drivers/base/core.c:4917
dev_printk_emit+0xe0/0x130 drivers/base/core.c:4928
_dev_warn+0x10a/0x160 drivers/base/core.c:4984
hid_parser_main+0x8b8/0xc40 drivers/hid/hid-core.c:-1
hid_open_report+0x85b/0xee0 drivers/hid/hid-core.c:1328
hid_parse include/linux/hid.h:1133 [inline]
hid_generic_probe+0x3d/0x90 drivers/hid/hid-generic.c:66
__hid_device_probe drivers/hid/hid-core.c:2733 [inline]
hid_device_probe+0x3a0/0x710 drivers/hid/hid-core.c:2770
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26d/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3692
hid_add_device+0x398/0x540 drivers/hid/hid-core.c:2916
uhid_device_add_worker+0x43/0xf0 drivers/hid/uhid.c:73
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245