INFO: task syz.4.8472:25917 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.8472      state:D stack:0     pid:25917 tgid:25917 ppid:23939  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: 0033:0x7fcb0338eba9
RSP: 002b:00007ffe847fbc88 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 000000000009471c RCX: 00007fcb0338eba9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fcb035d7da0 R08: 0000000000000001 R09: 00000010847fbf7f
R10: 0000001b2c220000 R11: 0000000000000246 R12: 00007fcb035d5fac
R13: 00007fcb035d5fa0 R14: ffffffffffffffff R15: 00007ffe847fbda0
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 999ed7ff739122807d950cd03a17deb2b8fbe7d9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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+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
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 282 Comm: syz-executor Not tainted syzkaller #0 999ed7ff739122807d950cd03a17deb2b8fbe7d9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:dequeue_entity+0x83/0x1750 kernel/sched/fair.c:5645
Code: 48 c7 84 24 d0 00 00 00 c0 33 5d 81 48 8d 8c 24 c0 00 00 00 48 c1 e9 03 48 b8 f1 f1 f1 f1 01 f3 f3 f3 48 89 8c 24 b8 00 00 00 <4a> 89 04 29 e8 74 5d 01 00 4c 89 74 24 18 4d 8d 7e 58 4c 89 f8 48
RSP: 0018:ffffc900011cf5e0 EFLAGS: 00000806
RAX: f3f3f301f1f1f1f1 RBX: ffff88810cef00c0 RCX: 1ffff92000239ed4
RDX: 0000000000000009 RSI: ffff88810cef00c0 RDI: ffff8881f6f4fc00
RBP: ffffc900011cf740 R08: 0000000000000027 R09: 1ffff110219de000
R10: 0000000000000000 R11: ffffffff815e1820 R12: 0000000000000009
R13: dffffc0000000000 R14: ffff8881f6f4fc00 R15: dffffc0000000000
FS:  0000555589ba1500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6231da4198 CR3: 000000010f246000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 dequeue_entities+0x1f2/0x1380 kernel/sched/fair.c:7295
 dequeue_task_fair+0x2ae/0x690 kernel/sched/fair.c:7395
 dequeue_task+0x442/0x8f0 kernel/sched/core.c:2139
 block_task kernel/sched/core.c:2231 [inline]
 try_to_block_task kernel/sched/core.c:7190 [inline]
 __schedule+0x3ab/0x1df0 kernel/sched/core.c:7709
 __schedule_loop kernel/sched/core.c:7872 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7887
 do_nanosleep+0x164/0x590 kernel/time/hrtimer.c:2094
 hrtimer_nanosleep+0x13e/0x320 kernel/time/hrtimer.c:2142
 common_nsleep+0x93/0xb0 kernel/time/posix-timers.c:1373
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1419 [inline]
 __se_sys_clock_nanosleep+0x300/0x390 kernel/time/posix-timers.c:1396
 __x64_sys_clock_nanosleep+0x9f/0xc0 kernel/time/posix-timers.c:1396
 x64_sys_call+0x2554/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:231
 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: 0033:0x7f75b1fc1423
Code: 1f 84 00 00 00 00 00 83 ff 03 74 7b 83 ff 02 b8 fa ff ff ff 49 89 ca 0f 44 f8 80 3d 3e 71 1e 00 00 74 14 b8 e6 00 00 00 0f 05 <f7> d8 c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10
RSP: 002b:00007fff2e7f3bd8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f75b1fc1423
RDX: 00007fff2e7f3bf0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000151d0019 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 00007fff2e7f4040
R13: 0000000000000004 R14: 00007fff2e7f3c2c R15: 00007fff2e7f3cc0
 </TASK>