INFO: task syz.4.3412:10870 blocked for more than 122 seconds.
      Not tainted 6.12.38-syzkaller-gd6ad6516b816 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.3412      state:D stack:0     pid:10870 tgid:10870 ppid:8785   flags:0x00004006
Call Trace:
 <TASK>
 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: 0033:0x7f27bf18e9a9
RSP: 002b:00007ffe63a7fef8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f27bf3b7ba0 RCX: 00007f27bf18e9a9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f27bf3b7ba0 R08: 0000000000000134 R09: 0000001163a801ef
R10: 00007f27bf3b7ac0 R11: 0000000000000246 R12: 0000000000031ac4
R13: 00007f27bf3b6160 R14: ffffffffffffffff R15: 00007ffe63a80010
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.38-syzkaller-gd6ad6516b816 #0 c3d5dfea3b27501c55366ca85841e234aef3b30d
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: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
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 18011 Comm: syz.8.5766 Not tainted 6.12.38-syzkaller-gd6ad6516b816 #0 c3d5dfea3b27501c55366ca85841e234aef3b30d
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0xc/0x90 kernel/kcov.c:314
Code: 48 89 44 11 20 5d e9 83 1e 03 04 cc 66 90 b8 25 bf 55 7f 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 48 8b 45 08 <65> 48 8b 14 25 80 e9 04 00 65 8b 0d 7c 1b 7f 7e 81 e1 00 01 ff 00
RSP: 0018:ffffc9000160f430 EFLAGS: 00000246
RAX: ffffffff812c5a56 RBX: 0000000000000001 RCX: 0000000000080000
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000008
RBP: ffffc9000160f430 R08: ffff88811ad15f00 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000002 R12: ffff88814c8859a2
R13: ffff88814c885b08 R14: dffffc0000000000 R15: ffff88814c885a90
FS:  00007f241a7126c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011717c000 CR4: 00000000003526b0
DR0: 000000000000f616 DR1: 0000000000001000 DR2: 7fffffffffffffff
DR3: 000000010000000f DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 cpu_kernelmode_gs_base arch/x86/include/asm/processor.h:423 [inline]
 vmx_prepare_switch_to_guest+0x3d6/0x7c0 arch/x86/kvm/vmx/vmx.c:1331
 vcpu_enter_guest arch/x86/kvm/x86.c:10903 [inline]
 vcpu_run+0x3cb1/0x7260 arch/x86/kvm/x86.c:11258
 kvm_arch_vcpu_ioctl_run+0x101a/0x1aa0 arch/x86/kvm/x86.c:11582
 kvm_vcpu_ioctl+0x96f/0xee0 virt/kvm/kvm_main.c:4511
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x132/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 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: 0033:0x7f241998e9a9
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:00007f241a712038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2419bb5fa0 RCX: 00007f241998e9a9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 00007f2419a10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2419bb5fa0 R15: 00007fffc30c6b08
 </TASK>