INFO: task syz-executor.2:9369 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc4-syzkaller-00388-gced590523156 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:25712 pid:9369  tgid:9367  ppid:5104   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x177f/0x49a0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 request_wait_answer fs/fuse/dev.c:407 [inline]
 __fuse_request_send fs/fuse/dev.c:426 [inline]
 fuse_simple_request+0x1198/0x1b90 fs/fuse/dev.c:513
 fuse_send_open fs/fuse/file.c:50 [inline]
 fuse_file_open+0x50d/0xb60 fs/fuse/file.c:147
 fuse_do_open fs/fuse/file.c:174 [inline]
 fuse_open_common+0x302/0x680 fs/fuse/file.c:253
 do_dentry_open+0x907/0x15a0 fs/open.c:953
 do_open fs/namei.c:3641 [inline]
 path_openat+0x285f/0x3240 fs/namei.c:3798
 do_filp_open+0x234/0x490 fs/namei.c:3825
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_openat fs/open.c:1435 [inline]
 __se_sys_openat fs/open.c:1430 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1430
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f62a667c9a0
RSP: 002b:00007f62a742ce80 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000010000 RCX: 00007f62a667c9a0
RDX: 0000000000010000 RSI: 0000000020002780 RDI: 00000000ffffff9c
RBP: 0000000020002780 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000020002780
R13: 00007f62a742cf40 R14: 0000000000000000 R15: 0000000020002800
 </TASK>

Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
3 locks held by kworker/u4:1/12:
1 lock held by khungtaskd/29:
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4810:
 #0: ffff88802b4eb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by kworker/0:3/5120:
 #0: ffff8880b943c918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
 #1: ffff8880b9428988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
 #2: ffff8880b9429898 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x120/0x260 kernel/time/timer.c:999
2 locks held by kworker/1:6/5135:
 #0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
 #0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
 #1: ffffc9000473fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
 #1: ffffc9000473fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
1 lock held by syz-executor.0/13119:
 #0: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
 #0: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:995
2 locks held by syz-executor.3/13212:
4 locks held by syz-executor.2/13213:

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc4-syzkaller-00388-gced590523156 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xfaf/0xff0 kernel/hung_task.c:379
 kthread+0x2ef/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5101 Comm: syz-executor.1 Not tainted 6.8.0-rc4-syzkaller-00388-gced590523156 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:__rb_insert_augmented+0x182/0x6b0 lib/rbtree.c:459
Code: 85 ad 02 00 00 4c 8b 2c 24 4d 8d 7d 01 49 bc 00 00 00 00 00 fc ff df 42 80 3c 23 00 74 08 48 89 ef e8 12 a7 9b f6 4c 89 7d 00 <48> 8b 44 24 20 42 80 3c 20 00 74 08 4c 89 f7 e8 fa a6 9b f6 4d 89
RSP: 0018:ffffc90000007470 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 1ffff110054b3302 RCX: dffffc0000000000
RDX: ffffffff8169bba0 RSI: ffff8880b943ca10 RDI: ffff8880176f8090
RBP: ffff88802a599810 R08: ffff8880176f80a7 R09: 0000000000000000
R10: ffff8880176f8098 R11: ffffed1002edf015 R12: dffffc0000000000
R13: ffff88807e178090 R14: ffff88802b24f010 R15: ffff88807e178091
FS:  00005555557d5480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff1e3c9cf8 CR3: 000000002d96e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 enqueue_entity+0x7f6/0x1930 kernel/sched/fair.c:5311
 enqueue_task_fair+0x171/0x8e0 kernel/sched/fair.c:6731
 enqueue_task+0x1a1/0x2f0 kernel/sched/core.c:2118
 activate_task+0x61/0xc0 kernel/sched/core.c:2148
 attach_task+0xee/0x190 kernel/sched/fair.c:9185
 attach_tasks kernel/sched/fair.c:9220 [inline]
 load_balance+0x66a5/0x8920 kernel/sched/fair.c:11348
 rebalance_domains+0x572/0xac0 kernel/sched/fair.c:11736
 __do_softirq+0x2bb/0x942 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu+0xf1/0x1c0 kernel/softirq.c:632
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x97/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:finish_task_switch+0x1ea/0x850 kernel/sched/core.c:5274
Code: c9 50 e8 d9 c9 0b 00 48 83 c4 08 4c 89 f7 e8 3d 37 00 00 0f 1f 44 00 00 4c 89 f7 e8 10 70 03 0a e8 fb 4e 35 00 fb 48 8b 5d c0 <48> 8d bb d8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc900044df488 EFLAGS: 00000282
RAX: 8b83a5963ce0cf00 RBX: ffff888021edd940 RCX: ffffffff9444d303
RDX: dffffc0000000000 RSI: ffffffff8baab5e0 RDI: ffffffff8bfd9960
RBP: ffffc900044df4d0 R08: ffffffff8f84396f R09: 1ffffffff1f0872d
R10: dffffc0000000000 R11: fffffbfff1f0872e R12: dffffc0000000000
R13: 1ffff11017287acf R14: ffff8880b943c900 R15: ffff8880b943d678
 context_switch kernel/sched/core.c:5403 [inline]
 __schedule+0x1787/0x49a0 kernel/sched/core.c:6727
 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6904
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6928
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 filemap_remove_folio+0x1d4/0x2e0 mm/filemap.c:259
 truncate_inode_folio+0x5d/0x70 mm/truncate.c:195
 shmem_undo_range+0x439/0x1da0 mm/shmem.c:1001
 shmem_truncate_range mm/shmem.c:1114 [inline]
 shmem_evict_inode+0x29b/0xa60 mm/shmem.c:1242
 evict+0x2a8/0x630 fs/inode.c:665
 __dentry_kill+0x20d/0x630 fs/dcache.c:603
 dput+0x19f/0x2b0 fs/dcache.c:845
 __fput+0x678/0x8a0 fs/file_table.c:384
 task_work_run+0x24e/0x310 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x167/0x370 kernel/entry/common.c:212
 do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fd3fca7f0d7
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff367f4548 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd3fca7f0d7
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fff367f4600
RBP: 00007fff367f4600 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff367f56c0
R13: 00007fd3fcac93b9 R14: 00000000000715a7 R15: 0000000000000007
 </TASK>