INFO: task syz.4.12104:4189 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.12104     state:D stack:0     pid:4189  tgid:4189  ppid:3541   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+0xbd/0x160 fs/open.c:1563
 __range_close fs/file.c:710 [inline]
 __close_range+0x50e/0x6c0 fs/file.c:767
 __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: 0033:0x7fb45b98eec9
RSP: 002b:00007ffd5b3767c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00000000000c31b4 RCX: 00007fb45b98eec9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fb45bbe7da0 R08: 0000000000000001 R09: 0000001e5b376abf
R10: 0000001b31420000 R11: 0000000000000246 R12: 00007fb45bbe5fac
R13: 00007fb45bbe5fa0 R14: ffffffffffffffff R15: 00007ffd5b3768e0
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 658fd523d4664e50339751640158cdc1077a64d7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5704 Comm: syz.5.12605 Not tainted syzkaller #0 658fd523d4664e50339751640158cdc1077a64d7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:zap_present_folio_ptes mm/memory.c:-1 [inline]
RIP: 0010:zap_present_ptes mm/memory.c:1590 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1633 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1763 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1792 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1813 [inline]
RIP: 0010:unmap_page_range+0x1a2f/0x3f80 mm/memory.c:1834
Code: 9c 80 01 00 00 eb 11 e8 cf 7f b9 ff b8 01 00 00 00 ff 8c 84 80 01 00 00 48 8b 74 24 38 48 8b 7c 24 68 49 89 f5 e8 41 fb 78 ff <48> 8b 4c 24 28 48 89 cb 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc900077bf540 EFLAGS: 00000293
RAX: ffffffff81457b9d RBX: 0000000000000000 RCX: ffff8881445a5f00
RDX: 0000000000000000 RSI: 8000000124fdd007 RDI: ffff8881453533c0
RBP: ffffc900077bf770 R08: ffffea000493f747 R09: 1ffffd4000927ee8
R10: dffffc0000000000 R11: fffff94000927ee9 R12: 0400000000000000
R13: 8000000124fdd007 R14: ffffea000493f758 R15: 00007eff9f0f8000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055902c6c5b98 CR3: 000000016e86a000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 unmap_single_vma mm/memory.c:1880 [inline]
 unmap_vmas+0x2c5/0x3e0 mm/memory.c:1924
 exit_mmap+0x25b/0xb60 mm/mmap.c:1962
 __mmput+0x93/0x320 kernel/fork.c:1349
 mmput+0x55/0x170 kernel/fork.c:1372
 exit_mm kernel/exit.c:574 [inline]
 do_exit+0x918/0x2630 kernel/exit.c:940
 do_group_exit+0x22a/0x300 kernel/exit.c:1095
 get_signal+0x139d/0x14f0 kernel/signal.c:2933
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7eff9f3c1785
Code: Unable to access opcode bytes at 0x7eff9f3c175b.
RSP: 002b:00007effa01c2f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007eff9f5e5fa0 RCX: 00007eff9f3c1785
RDX: 00007effa01c2fc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007eff9f411f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007eff9f5e6038 R14: 00007eff9f5e5fa0 R15: 00007ffdf43c9268
 </TASK>