INFO: task syz.3.2100:6214 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-ge2bf362ee23b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2100 state:D stack:0 pid:6214 tgid:6212 ppid:291 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5929 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7755
__schedule_loop kernel/sched/core.c:7836 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7851
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x359/0x630 kernel/sched/completion.c:127
wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:419 [inline]
do_coredump+0x7cf/0x2bd0 fs/coredump.c:576
get_signal+0x11fd/0x14f0 kernel/signal.c:2919
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0003:0x7ffe0f6c3dc0
RSP: 0003:00007f9283bb608c EFLAGS: 00050b02
RAX: 0000000000000000 RBX: 000000003583862d RCX: 00007f9283bb6080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000009a R08: 00007f9283bb6080 R09: 00000000847710c0
R10: ffffffff000015be R11: 00007f9283b31c80 R12: 000000000000009a
R13: 0000000035843a9a R14: 0000000000000000 R15: 0000000000000000
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-ge2bf362ee23b #0 e1c904518e9113895a28c59b25a6002cdacb68bf
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:229 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:385
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 14231 Comm: syz.9.4777 Not tainted 6.12.30-syzkaller-ge2bf362ee23b #0 e1c904518e9113895a28c59b25a6002cdacb68bf
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:230 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:149 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:256 [inline]
RIP: 0010:native_apic_msr_write+0x42/0x60 arch/x86/include/asm/apic.h:212
Code: 75 17 5d e9 c0 06 45 04 cc 81 ff d0 00 00 00 74 f1 81 ff e0 00 00 00 74 e9 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 eb d4 f3 0f 1e fa 89 f6 31 d2 e8 5d a3 99 01 5d e9 87 06 45
RSP: 0018:ffffc90002107980 EFLAGS: 00000046
RAX: 000000000000003e RBX: ffff8881f6f28398 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 000000000000003e RDI: 0000000000000838
RBP: ffffc90002107980 R08: ffff888119d6df00 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff8141be90 R12: 000000000000003e
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000020
FS: 000055557dfdb500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f72d1d46f70 CR3: 000000012befa000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
apic_write arch/x86/include/asm/apic.h:405 [inline]
lapic_next_event+0x15/0x20 arch/x86/kernel/apic/apic.c:415
clockevents_program_min_delta+0x1b9/0x360 kernel/time/clockevents.c:248
clockevents_program_event+0x24d/0x350 kernel/time/clockevents.c:-1
tick_program_event+0x9b/0x120 kernel/time/tick-oneshot.c:44
__hrtimer_reprogram kernel/time/hrtimer.c:710 [inline]
hrtimer_reprogram+0x341/0x3e0 kernel/time/hrtimer.c:893
hrtimer_start_range_ns+0x16da/0x2190 kernel/time/hrtimer.c:1358
hrtimer_start_expires include/linux/hrtimer.h:290 [inline]
hrtimer_restart include/linux/hrtimer.h:298 [inline]
common_hrtimer_rearm+0x10e/0x120 kernel/time/posix-timers.c:249
posixtimer_rearm+0x155/0x360 kernel/time/posix-timers.c:267
dequeue_signal+0x1c6/0x4f0 kernel/signal.c:700
get_signal+0x51c/0x14f0 kernel/signal.c:2814
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fd09358e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffce88e3058 EFLAGS: 00000246
RAX: fffffffffffffffc RBX: 000000000004727d RCX: 00007fd09358e929
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd0937b5fac
RBP: 0000000000000032 R08: 7fffffffffffffff R09: 00000008e88e334f
R10: 00007ffce88e3150 R11: 0000000000000246 R12: 00007fd0937b5fac
R13: 00007ffce88e3150 R14: 00000000000472af R15: 00007ffce88e3170