INFO: task kcompactd0:30 blocked for more than 143 seconds.
      Not tainted 5.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0      state:D stack:24048 pid:   30 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4972 [inline]
 __schedule+0xb72/0x1460 kernel/sched/core.c:6253
 schedule+0x12b/0x1f0 kernel/sched/core.c:6326
 io_schedule+0x83/0x100 kernel/sched/core.c:8371
 folio_wait_bit_common+0x8aa/0xe00 mm/filemap.c:1371
 lock_page include/linux/pagemap.h:796 [inline]
 __unmap_and_move+0x9d9/0xda0 mm/migrate.c:980
 unmap_and_move+0x321/0xd70 mm/migrate.c:1204
 migrate_pages+0x562/0x16f0 mm/migrate.c:1481
 compact_zone+0x2d23/0x3d10 mm/compaction.c:2399
 kcompactd_do_work mm/compaction.c:2839 [inline]
 kcompactd+0x937/0x2920 mm/compaction.c:2941
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>

Showing all locks held in the system:
1 lock held by systemd/1:
1 lock held by khungtaskd/27:
 #0: ffffffff8cb1db40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by khugepaged/33:
1 lock held by kswapd1/99:
3 locks held by kworker/0:3/1135:
1 lock held by systemd-journal/2954:
 #0: ffffffff8cbe1c88 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x58/0x690 mm/page_alloc.c:3181
1 lock held by cron/6141:
1 lock held by in:imklog/6179:
 #0: ffff888022d074f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:994
1 lock held by syz-fuzzer/6492:
 #0: ffff88807024cb58 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
 #0: ffff88807024cb58 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x342/0x1630 mm/filemap.c:3081
1 lock held by syz-fuzzer/6515:
1 lock held by syz-executor.5/19990:
 #0: ffff8881470eacc8 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
 #0: ffff8881470eacc8 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x1b8/0x9f0 mm/readahead.c:194

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xc82/0xcd0 kernel/hung_task.c:295
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 54 Comm: kworker/u4:3 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:mark_lock+0x6/0x1e00 kernel/locking/lockdep.c:4566
Code: 07 80 c1 03 38 c1 0f 8c 6f ff ff ff 4c 89 ff e8 40 ed 69 00 e9 62 ff ff ff e8 06 ba ab 08 66 0f 1f 44 00 00 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 48 83 e4 e0 48 81 ec c0 01 00 00 65 48 8b 04
RSP: 0018:ffffc90001a2f8e8 EFLAGS: 00000046
RAX: 0000000000000002 RBX: ffff8880178761d0 RCX: 00000000ffffffff
RDX: 0000000000000008 RSI: ffff8880178761b0 RDI: ffff888017875700
RBP: ffffc90001a2f8f0 R08: dffffc0000000000 R09: fffffbfff1ff35f8
R10: fffffbfff1ff35f8 R11: 0000000000000000 R12: 000000000000000a
R13: ffff8880178761b0 R14: ffff888017875700 R15: ffff8880178761d0
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0242e5cc0 CR3: 000000006ec58000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 mark_usage kernel/locking/lockdep.c:4526 [inline]
 __lock_acquire+0xd38/0x2b00 kernel/locking/lockdep.c:4981
 lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5637
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:268
 rcu_read_lock include/linux/rcupdate.h:688 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0xc8/0x5b0 net/batman-adv/network-coding.c:723
 process_one_work+0x853/0x1140 kernel/workqueue.c:2298
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	80 c1 03             	add    $0x3,%cl
   3:	38 c1                	cmp    %al,%cl
   5:	0f 8c 6f ff ff ff    	jl     0xffffff7a
   b:	4c 89 ff             	mov    %r15,%rdi
   e:	e8 40 ed 69 00       	callq  0x69ed53
  13:	e9 62 ff ff ff       	jmpq   0xffffff7a
  18:	e8 06 ba ab 08       	callq  0x8abba23
  1d:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
  23:	55                   	push   %rbp
  24:	48 89 e5             	mov    %rsp,%rbp
  27:	41 57                	push   %r15
* 29:	41 56                	push   %r14 <-- trapping instruction
  2b:	41 55                	push   %r13
  2d:	41 54                	push   %r12
  2f:	53                   	push   %rbx
  30:	48 83 e4 e0          	and    $0xffffffffffffffe0,%rsp
  34:	48 81 ec c0 01 00 00 	sub    $0x1c0,%rsp
  3b:	65                   	gs
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	04                   	.byte 0x4