INFO: task syz-executor:7128 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21800 pid:7128  tgid:7128  ppid:1      task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 io_schedule+0x80/0xd0
 folio_wait_bit_common+0x6b0/0xb90
 __filemap_get_folio+0x139/0xaf0
 truncate_inode_pages_range+0x3ed/0xda0
 evict+0x517/0x9c0
 evict_inodes+0x64c/0x6d0
 generic_shutdown_super+0x9a/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3177b8fed7
RSP: 002b:00007ffd4c890348 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3177c11c05 RCX: 00007f3177b8fed7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd4c890400
RBP: 00007ffd4c890400 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd4c891490
R13: 00007f3177c11c05 R14: 00000000000221dd R15: 00007ffd4c8914d0
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5671:
 #0: ffff88801fd850a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
6 locks held by kworker/u8:4/5889:
 #0: ffff88801b2f7148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90003c0fbc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f52d090 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf7/0x800
 #3: ffffffff8f539f48 (rtnl_mutex){+.+.}-{4:4}, at: caif_exit_net+0x6a/0x4a0
 #4: ffff888109d09280 (&caifn->caifdevs.lock){+.+.}-{4:4}, at: caif_exit_net+0x7d/0x4a0
 #5: ffffffff8e13fb78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
1 lock held by syz-executor/7128:
 #0: ffff8880218680e0 (&type->s_umount_key#109){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
3 locks held by kworker/0:8/7245:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90003e6fbc0 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8e13fb78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
1 lock held by syz.0.475/9647:
 #0: ffff8880218680e0 (&type->s_umount_key#109){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.8.659/11358:
 #0: ffff8880218680e0 (&type->s_umount_key#109){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.5.672/11491:
 #0: ffff888011cae0e0 (&type->s_umount_key#82){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0
2 locks held by dhcpcd-run-hook/11507:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11507 Comm: rm Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:count_memcg_event_mm+0x3/0x260
Code: c7 c6 00 29 96 8b e8 4c 88 1d ff 90 0f 0b 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 <41> 56 53 89 f5 49 89 fe e8 70 49 b5 ff 0f 1f 44 00 00 e8 86 b5 9c
RSP: 0000:ffffc900068b7dc8 EFLAGS: 00000207
RAX: ffffffff820b07a8 RBX: 0000000000000100 RCX: ffff888111a78000
RDX: 0000000000000000 RSI: 0000000000000017 RDI: ffff8880236f5600
RBP: 0000000000000020 R08: ffffffff8fa3a537 R09: 1ffffffff1f474a6
R10: dffffc0000000000 R11: fffffbfff1f474a7 R12: 0000000000001354
R13: ffff888111a78000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f78e29f2380(0000) GS:ffff8881a3c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78e2a72000 CR3: 000000011561c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 handle_mm_fault+0x50f/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f78e2a72000
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <48> 83 ec 08 48 8b 05 c5 9f 00 00 48 85 c0 74 02 ff d0 e8 0f 04 00
RSP: 002b:00007fffc167ddc8 EFLAGS: 00010206
RAX: 00007f78e2a72000 RBX: 00007f78e2cf3a00 RCX: 00007fffc167de78
RDX: 00007fffc167de78 RSI: 00007fffc167de58 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: ead7c3b0947bb25e
R10: 000055eb88847680 R11: 0000000000000246 R12: 0000000000000003
R13: 00007fffc167de58 R14: 00007fffc167de78 R15: 0000000000000000
 </TASK>
