INFO: task syz.2.16:363 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.2.16        state:D stack:0     pid:363   tgid:363   ppid:359    flags:0x00004006
Call Trace:
 <TASK>
 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
 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: 0033:0x7ff7a798e929
RSP: 002b:00007ffe4023b5e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 0000000000007cf1 RCX: 00007ff7a798e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007ff7a7bb7ba0 R08: 0000000000000001 R09: 0000000b4023b8df
R10: 00007ff7a7800000 R11: 0000000000000246 R12: 00007ff7a7bb5fac
R13: 00007ff7a7bb5fa0 R14: ffffffffffffffff R15: 00007ffe4023b700
 </TASK>
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:
 <TASK>
 __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
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 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:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x33/0x90 kernel/kcov.c:300
Code: 8b 45 08 65 48 8b 14 25 40 e9 04 00 65 8b 0d fc 42 7f 7e 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba ec 0b 00 00 00 <74> 52 8b 8a c8 0b 00 00 83 f9 03 75 47 48 8b 8a d0 0b 00 00 44 8b
RSP: 0018:ffffc90000230610 EFLAGS: 00000046
RAX: ffffffff813b9d9a RBX: 00000028468a5f5d RCX: 0000000000000100
RDX: ffff88810366a600 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90000230610 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520000460f4 R12: ffff8881f6e4f7c0
R13: dffffc0000000000 R14: ffffc90000230600 R15: 1ffff920000460d0
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556e19f4a8 CR3: 000000011cc4c000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:94 [inline]
 sched_clock+0x3a/0x60 arch/x86/kernel/tsc.c:285
 sched_clock_cpu+0x75/0x400 kernel/sched/clock.c:394
 update_rq_clock+0xbf/0x7c0 kernel/sched/core.c:856
 sched_balance_rq+0x2950/0x5060 kernel/sched/fair.c:12042
 sched_balance_domains+0x4b4/0xa10 kernel/sched/fair.c:12474
 _nohz_idle_balance+0x3e3/0x5a0 kernel/sched/fair.c:12925
 nohz_idle_balance kernel/sched/fair.c:12968 [inline]
 sched_balance_softirq+0x8a/0x170 kernel/sched/fair.c:13196
 handle_softirqs+0x1ae/0x630 kernel/softirq.c:603
 __do_softirq kernel/softirq.c:641 [inline]
 invoke_softirq kernel/softirq.c:458 [inline]
 __irq_exit_rcu+0x48/0xc0 kernel/softirq.c:690
 irq_exit_rcu+0xd/0x30 kernel/softirq.c:702
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
 sysvec_call_function_single+0x7f/0x90 arch/x86/kernel/smp.c:266
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:709
RIP: 0010:pv_native_safe_halt+0x17/0x20 arch/x86/kernel/paravirt.c:106
Code: cc cc cc b8 7c 11 ba ea 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 73 bc 41 00 f3 0f 1e fa 55 48 89 e5 fb f4 <5d> e9 c3 59 02 00 cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7e00 EFLAGS: 000002c6
RAX: ffff8881f6f00000 RBX: ffff88810366a600 RCX: ffffffff8585900e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000032a24
RBP: ffffc900001a7e00 R08: ffff8881f6f39733 R09: 1ffff1103ede72e6
R10: dffffc0000000000 R11: ffffed103ede72e7 R12: 1ffff110206cd4c0
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff87ca73a8
 arch_safe_halt arch/x86/include/asm/paravirt.h:112 [inline]
 default_idle+0x17/0x30 arch/x86/kernel/process.c:748
 arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:785
 default_idle_call+0x3f/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:185 [inline]
 do_idle+0x1a0/0x470 kernel/sched/idle.c:326
 cpu_startup_entry+0x48/0x70 kernel/sched/idle.c:424
 start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13b/0x157
 </TASK>