INFO: task syz-executor.2:22980 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc6-syzkaller-00250-g04b8076df253 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:25744 pid:22980 tgid:22979 ppid:5091   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:3645 [inline]
 path_openat+0x285f/0x3240 fs/namei.c:3802
 do_filp_open+0x234/0x490 fs/namei.c:3829
 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: 0033:0x7fc83247c9a0
RSP: 002b:00007fc83313ee80 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000010000 RCX: 00007fc83247c9a0
RDX: 0000000000010000 RSI: 0000000020002780 RDI: 00000000ffffff9c
RBP: 0000000020002780 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000020002780
R13: 00007fc83313ef40 R14: 0000000000000000 R15: 0000000020002800
 </TASK>

Showing all locks held in the system:
1 lock held by ksoftirqd/1/22:
 #0: ffff8880b953c918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
1 lock held by khungtaskd/29:
 #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
1 lock held by udevd/4509:
2 locks held by getty/4820:
 #0: ffff88802ab210a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.4/24986:
1 lock held by syz-executor.3/24989:
2 locks held by syz-executor.0/24993:
2 locks held by udevadm/25009:

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc6-syzkaller-00250-g04b8076df253 #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:243
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 25006 Comm: syz-executor.2 Not tainted 6.8.0-rc6-syzkaller-00250-g04b8076df253 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200
Code: 89 fb e8 23 00 00 00 48 8b 3d 94 75 19 0c 48 89 de 5b e9 d3 7c 53 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d 60 52 70 7e 65 8b 15 61 52 70
RSP: 0018:ffffc900033cf2f8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888071d55940
RDX: ffff888071d55940 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffea0000b2c6c0 R08: ffffffff81e2e04d R09: 1ffffd40001658d8
R10: dffffc0000000000 R11: fffff940001658d9 R12: ffffea0000b2c6c0
R13: 800000002cb1b007 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5e06477040 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __folio_rmap_sanity_checks+0x4b/0x5b0 include/linux/rmap.h:212
 __folio_remove_rmap mm/rmap.c:1509 [inline]
 folio_remove_rmap_ptes+0x45/0x540 mm/rmap.c:1590
 zap_pte_range mm/memory.c:1478 [inline]
 zap_pmd_range mm/memory.c:1597 [inline]
 zap_pud_range mm/memory.c:1626 [inline]
 zap_p4d_range mm/memory.c:1647 [inline]
 unmap_page_range+0x1820/0x3600 mm/memory.c:1668
 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1758
 exit_mmap+0x2c6/0xd40 mm/mmap.c:3279
 __mmput+0x115/0x3c0 kernel/fork.c:1343
 exit_mm+0x21f/0x310 kernel/exit.c:569
 do_exit+0x9af/0x2740 kernel/exit.c:858
 do_group_exit+0x206/0x2c0 kernel/exit.c:1020
 get_signal+0x176d/0x1850 kernel/signal.c:2893
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [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+0xc8/0x360 kernel/entry/common.c:212
 do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f4a0187dda9
Code: Unable to access opcode bytes at 0x7f4a0187dd7f.
RSP: 002b:00007f4a02668178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f4a019ac128 RCX: 00007f4a0187dda9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4a019ac128
RBP: 00007f4a019ac120 R08: 00007f4a026686c0 R09: 00007f4a026686c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4a019ac12c
R13: 000000000000000b R14: 00007fff46788120 R15: 00007fff46788208
 </TASK>