INFO: task syz.6.6283:19405 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.6283 state:D stack:0 pid:19405 tgid:19405 ppid:18160 flags:0x00004006
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
request_wait_answer fs/fuse/dev.c:476 [inline]
__fuse_request_send fs/fuse/dev.c:491 [inline]
__fuse_simple_request+0xdb1/0x1980 fs/fuse/dev.c:586
fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
fuse_flush+0x909/0x1d50 fs/fuse/file.c:582
filp_flush fs/open.c:1550 [inline]
filp_close+0xc0/0x160 fs/open.c:1563
__range_close fs/file.c:712 [inline]
__close_range+0x50e/0x6c0 fs/file.c:769
__do_sys_close_range fs/open.c:1616 [inline]
__se_sys_close_range fs/open.c:1613 [inline]
__x64_sys_close_range+0x7e/0x90 fs/open.c:1613
x64_sys_call+0x1686/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:437
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: 0033:0x7ff61cd8eba9
RSP: 002b:00007ffcf9eed3d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ff61cfd7da0 RCX: 00007ff61cd8eba9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007ff61cfd7da0 R08: 0000000000000210 R09: 0000001ef9eed6cf
R10: 00007ff61cfd7cb0 R11: 0000000000000246 R12: 000000000005674d
R13: 00007ff61cfd6180 R14: ffffffffffffffff R15: 00007ffcf9eed4f0
INFO: task syz.6.6283:19407 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.6283 state:D stack:0 pid:19407 tgid:19405 ppid:18160 flags:0x00004006
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
request_wait_answer fs/fuse/dev.c:476 [inline]
__fuse_request_send fs/fuse/dev.c:491 [inline]
__fuse_simple_request+0xdb1/0x1980 fs/fuse/dev.c:586
fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
fuse_flush+0x909/0x1d50 fs/fuse/file.c:582
filp_flush fs/open.c:1550 [inline]
filp_close+0xc0/0x160 fs/open.c:1563
close_files fs/file.c:427 [inline]
put_files_struct+0x1b5/0x330 fs/file.c:442
exit_files+0x84/0xa0 fs/file.c:459
copy_process+0x21f8/0x3220 kernel/fork.c:2678
kernel_clone+0x23f/0x830 kernel/fork.c:2819
__do_sys_clone kernel/fork.c:2964 [inline]
__se_sys_clone kernel/fork.c:2948 [inline]
__x64_sys_clone+0x18c/0x1f0 kernel/fork.c:2948
x64_sys_call+0x2b3c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:57
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: 0033:0x7ff61cd8eba9
RSP: 002b:00007ff61b7c1fe8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ff61cfd6090 RCX: 00007ff61cd8eba9
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 498144ee5f62e049
RBP: 00007ff61ce11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007ff61cfd6128 R14: 00007ff61cfd6090 R15: 00007ffcf9eed278
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 7dd95e4db5dfeba9bec18e378df2347c8fceb7ef
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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+0x2c7/0x370 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 27136 Comm: syz.8.8882 Not tainted syzkaller #0 7dd95e4db5dfeba9bec18e378df2347c8fceb7ef
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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 c3 cc cc cc cc 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 1d 8d 9a 01 5d c3 cc cc cc
RSP: 0000:ffffc900030e7d38 EFLAGS: 00000046
RAX: 0000000000051ebd RBX: ffff8881f6f28380 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 0000000000051ebd RDI: 0000000000000838
RBP: ffffc900030e7d38 R08: ffff888113841300 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff8141ee60 R12: 0000000000000020
R13: dffffc0000000000 R14: 00000000100058eb R15: 0000000000051ebd
FS: 000055556a8cb500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f60e4790f98 CR3: 000000011d14a000 CR4: 00000000003526b0
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_event+0x1dd/0x350 kernel/time/clockevents.c:334
tick_program_event+0x9b/0x120 kernel/time/tick-oneshot.c:44
hrtimer_interrupt+0xa66/0xf00 kernel/time/hrtimer.c:1892
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+0x3f/0x90 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0033:0x7f1e9d9b72f1
Code: 25 90 f8 ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 83 ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 <53> 48 89 f3 48 83 ec 18 8b 6e 10 e8 5f e8 fc ff 39 c5 0f 85 f7 00
RSP: 002b:00007ffe0b984c70 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f1e9dbd5fa0 RCX: 00007f1e9d9c1465
RDX: 00007ffe0b984c80 RSI: 00007ffe0b984db0 RDI: 0000000000000021
RBP: 00007f1e9dbd7da0 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000078f5e
R13: 00007f1e9dbd6090 R14: ffffffffffffffff R15: 00007ffe0b9853a0