INFO: task syz.6.2323:7480 blocked for more than 122 seconds.
      Not tainted 6.12.30-syzkaller-g379b99745e88 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.2323      state:D stack:0     pid:7480  tgid:7480  ppid:3513   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x132b/0x1e00 kernel/sched/core.c:7789
 __schedule_loop kernel/sched/core.c:7870 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7885
 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+0xbd/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: 0033:0x7f047ad8e9a9
RSP: 002b:00007ffc11c76628 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f047afb7ba0 RCX: 00007f047ad8e9a9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f047afb7ba0 R08: 0000000000000000 R09: 0000001411c7691f
R10: 00007f047afb7ac0 R11: 0000000000000246 R12: 000000000002d1fa
R13: 00007f047afb6080 R14: ffffffffffffffff R15: 00007ffc11c76740
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-g379b99745e88 #0 11522de10711ed1cb6b8bd0366ad005e7892f9f5
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+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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 281 Comm: syz-executor Not tainted 6.12.30-syzkaller-g379b99745e88 #0 11522de10711ed1cb6b8bd0366ad005e7892f9f5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:group_cfs_rq kernel/sched/sched.h:1642 [inline]
RIP: 0010:skip_blocked_update kernel/sched/fair.c:4613 [inline]
RIP: 0010:__update_blocked_fair kernel/sched/fair.c:10053 [inline]
RIP: 0010:sched_balance_update_blocked_averages+0xa9f/0x1320 kernel/sched/fair.c:10147
Code: 7c 00 4d 8b 3f 4d 85 ff 0f 84 f0 00 00 00 49 8d bf a8 00 00 00 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 05 e8 aa e0 7c 00 4d 8b a7 a8 00 00 00 49 8d 9f e0 00 00 00 48
RSP: 0018:ffffc900011cf660 EFLAGS: 00000046
RAX: 1ffff11027f80215 RBX: ffff888113f76c00 RCX: dffffc0000000000
RDX: 00000000000000ac RSI: dffffc0000000000 RDI: ffff88813fc010a8
RBP: ffffc900011cf7b0 R08: 0000000000000000 R09: 1ffff110277a391b
R10: dffffc0000000000 R11: ffff88813bd1c8dc R12: dffffc0000000000
R13: ffff888113f76d48 R14: 1ffff110227eedab R15: ffff88813fc01000
FS:  000055557ce2b500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0686983178 CR3: 0000000121690000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sched_balance_newidle+0x36f/0xe00 kernel/sched/fair.c:13105
 pick_next_task_fair+0xbd/0x900 kernel/sched/fair.c:9187
 __pick_next_task kernel/sched/core.c:6605 [inline]
 pick_next_task kernel/sched/core.c:7125 [inline]
 __schedule+0x666/0x1e00 kernel/sched/core.c:7716
 __schedule_loop kernel/sched/core.c:7870 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7885
 do_nanosleep+0x164/0x590 kernel/time/hrtimer.c:2099
 hrtimer_nanosleep+0x13e/0x320 kernel/time/hrtimer.c:2147
 common_nsleep+0x93/0xb0 kernel/time/posix-timers.c:1365
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1411 [inline]
 __se_sys_clock_nanosleep+0x300/0x390 kernel/time/posix-timers.c:1388
 __x64_sys_clock_nanosleep+0x9f/0xc0 kernel/time/posix-timers.c:1388
 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: 0033:0x7f14f4dc1223
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 1e 63 1c 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:00007ffdc2de93c8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f14f4dc1223
RDX: 00007ffdc2de93e0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000013e62f71 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffdc2de9830
R13: 0000000000000004 R14: 00007ffdc2de941c R15: 00007ffdc2de94b0
 </TASK>