INFO: task aaaaaaaaaaaaaaa:6797 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:aaaaaaaaaaaaaaa state:D stack:0 pid:6797 tgid:6796 ppid:3177 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5945 [inline]
__schedule+0x1322/0x1df0 kernel/sched/core.c:7791
__schedule_loop kernel/sched/core.c:7872 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7887
super_lock+0x150/0x300 fs/super.c:115
super_lock_shared fs/super.c:140 [inline]
iterate_supers+0x8a/0x560 fs/super.c:934
ksys_sync+0x95/0x160 fs/sync.c:103
__ia32_sys_sync+0x12/0x20 fs/sync.c:114
x64_sys_call+0x2a58/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:163
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7ff41138f6c9
RSP: 002b:00007ff40fdf7038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007ff4115e5fa0 RCX: 00007ff41138f6c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ff4115e5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff4115e6038 R14: 00007ff4115e5fa0 R15: 00007ffdabd9ce48
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:423
kthread+0x2ca/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 53 Comm: kworker/u9:0 Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: hci0 hci_power_on
RIP: 0010:update_curr+0x0/0xaa0 kernel/sched/fair.c:1280
Code: ff 0d 0c 49 a6 7e 0f 85 da fd ff ff e8 e9 58 ab ff e9 d0 fd ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48
RSP: 0018:ffffc900000078a0 EFLAGS: 00000087
RAX: ffff88810aa539c0 RBX: ffff8881f6e4fb80 RCX: dffffc0000000000
RDX: 0000000000000409 RSI: ffff888139dd80c0 RDI: ffff8881f6e4fb80
RBP: ffffc90000007910 R08: ffff888139dd8111 R09: ffff8881f6e4fb80
R10: 0000000000000000 R11: ffffffff815e1090 R12: ffff888139dd8000
R13: dffffc0000000000 R14: ffff8881f6e4fbd0 R15: ffff888139dd80c0
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffff CR3: 000000010fe5a000 CR4: 00000000003526b0
Call Trace:
enqueue_task_fair+0x3fb/0x17e0 kernel/sched/fair.c:7181
enqueue_task+0x7df/0x11f0 kernel/sched/core.c:2104
__activate_task kernel/sched/core.c:2151 [inline]
activate_task+0x38b/0x3d0 kernel/sched/core.c:2185
ttwu_do_activate+0x154/0x630 kernel/sched/core.c:4209
ttwu_queue kernel/sched/core.c:4506 [inline]
try_to_wake_up+0xd87/0x1b00 kernel/sched/core.c:4845
wake_up_process+0x14/0x20 kernel/sched/core.c:4980
hrtimer_wakeup+0x52/0x70 kernel/time/hrtimer.c:1989
__run_hrtimer kernel/time/hrtimer.c:1753 [inline]
__hrtimer_run_queues+0x3c0/0x9e0 kernel/time/hrtimer.c:1817
hrtimer_interrupt+0x37e/0xf00 kernel/time/hrtimer.c:1879
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x8e/0x2b0 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x7d/0x90 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2076 [inline]
RIP: 0010:vprintk_emit+0x530/0x640 kernel/printk/printk.c:2461
Code: 81 e6 00 02 00 00 31 ff e8 cd 2e 1e 00 48 81 e3 00 02 00 00 75 07 e8 df 29 1e 00 eb 06 e8 d8 29 1e 00 fb c6 05 20 b6 31 07 00 42 fd ff ff e8 c6 29 1e 00 e9 a5 fe ff ff 41 ff ce bf 58 89 41
RSP: 0018:ffffc9000076f6c0 EFLAGS: 00000293
RAX: ffffffff8167d4d8 RBX: 0000000000000200 RCX: ffff88810aa53900
RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000
RBP: ffffc9000076f788 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520000edec8 R12: 1ffff920000ededc
R13: 000000000000002b R14: 0000000000000000 R15: dffffc0000000000
vprintk_default+0x2a/0x40 kernel/printk/printk.c:2477
vprintk+0x93/0xa0 kernel/printk/printk_safe.c:73
_printk+0xd0/0x120 kernel/printk/printk.c:2487
bt_err+0x10c/0x160 net/bluetooth/lib.c:296
__hci_cmd_sync_status_sk net/bluetooth/hci_sync.c:271 [inline]
__hci_cmd_sync_status net/bluetooth/hci_sync.c:287 [inline]
hci_read_local_features_sync net/bluetooth/hci_sync.c:3704 [inline]
hci_init_stage_sync net/bluetooth/hci_sync.c:3619 [inline]
hci_init1_sync net/bluetooth/hci_sync.c:3751 [inline]
hci_init_sync net/bluetooth/hci_sync.c:4831 [inline]
hci_dev_init_sync net/bluetooth/hci_sync.c:5023 [inline]
hci_dev_open_sync+0x112c/0x2980 net/bluetooth/hci_sync.c:5101
hci_dev_do_open net/bluetooth/hci_core.c:412 [inline]
hci_power_on+0x199/0x570 net/bluetooth/hci_core.c:941
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
kthread+0x2ca/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244