INFO: task syz-executor:468 blocked for more than 122 seconds.
      Not tainted 6.16.0-rc4-syzkaller-00286-gc435a4f487e8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:0     pid:468   tgid:468   ppid:1      task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0xfd2/0x1c60 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0xe0/0x280 kernel/sched/core.c:6878
 netfs_wait_for_outstanding_io include/linux/netfs.h:552 [inline]
 v9fs_evict_inode+0x15a/0x2d0 fs/9p/vfs_inode.c:348
 evict+0x4d0/0x970 fs/inode.c:810
 iput_final fs/inode.c:1898 [inline]
 iput+0x633/0x930 fs/inode.c:1924
 dentry_unlink_inode+0x373/0x420 fs/dcache.c:466
 __dentry_kill+0x1b4/0x5f0 fs/dcache.c:669
 dput+0x34b/0x4f0 fs/dcache.c:911
 do_one_tree fs/dcache.c:1607 [inline]
 shrink_dcache_for_umount+0xce/0x1a0 fs/dcache.c:1621
 generic_shutdown_super+0x6a/0x300 fs/super.c:621
 kill_anon_super+0x4b/0x1d0 fs/super.c:1282
 v9fs_kill_super+0x50/0x90 fs/9p/vfs_super.c:193
 deactivate_locked_super+0xd0/0x290 fs/super.c:474
 deactivate_super+0xb8/0xe0 fs/super.c:507
 cleanup_mnt+0x3f4/0x490 fs/namespace.c:1417
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1424
 task_work_run+0x1df/0x250 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xa3/0xd0 kernel/entry/common.c:114
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x134/0x160 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fad0638fc57
RSP: 002b:00007fff9d993a18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fad06410925 RCX: 00007fad0638fc57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff9d993ad0
RBP: 00007fff9d993ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff9d994b60
R13: 00007fad06410925 R14: 000000000000e0e7 R15: 00007fff9d994ba0
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.16.0-rc4-syzkaller-00286-gc435a4f487e8 #0 PREEMPT  d8f4ab0301d496d639b7c0d2a12cabdbe8999427
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+0x10b/0x180 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2bd/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:307 [inline]
 watchdog+0x1043/0x1090 kernel/hung_task.c:470
 kthread+0x6f4/0x880 kernel/kthread.c:464
 ret_from_fork+0x147/0x1f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-rc4-syzkaller-00286-gc435a4f487e8 #0 PREEMPT  d8f4ab0301d496d639b7c0d2a12cabdbe8999427
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:asm_sysvec_call_function_single+0x0/0x30 arch/x86/include/asm/idtentry.h:709
Code: ca fc 6a ff e8 e1 04 00 00 48 89 c4 48 8d 6c 24 01 48 89 e7 e8 51 9a 93 04 e9 0c 06 00 00 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 0f 01 ca fc 6a ff e8 b1 04 00 00 48 89 c4 48 8d 6c 24
RSP: 0018:ffffffff87007d58 EFLAGS: 000000c2
RAX: ffff88826e783000 RBX: ffffffff870174c0 RCX: ffffffff8593c0ae
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 000000000003b0a4
RBP: ffffffff87007d80 R08: ffff8881f6e34383 R09: 1ffff1103edc6870
R10: dffffc0000000000 R11: ffffed103edc6871 R12: 1ffffffff0e02e98
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87a6dab0
FS:  0000000000000000(0000) GS:ffff88826e783000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31c5ffff CR3: 000000010b706000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x17/0x30 arch/x86/kernel/process.c:749
 arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:786
 default_idle_call+0x3f/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:185 [inline]
 do_idle+0x19c/0x470 kernel/sched/idle.c:325
 cpu_startup_entry+0x48/0x70 kernel/sched/idle.c:423
 rest_init+0x10b/0x130 init/main.c:745
 start_kernel+0x46a/0x4bb init/main.c:1102
 x86_64_start_reservations+0x28/0x30 arch/x86/kernel/head64.c:307
 x86_64_start_kernel+0x147/0x1cb arch/x86/kernel/head64.c:288
 common_startup_64+0x13b/0x157
 </TASK>