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:24336 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:
 #0: ffff888145d94b58 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
 #0: ffff888145d94b58 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1b8/0x9f0 mm/readahead.c:194
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 kswapd0/98:
1 lock held by kswapd1/99:
1 lock held by systemd-journal/2968:
1 lock held by cron/6189:
1 lock held by in:imklog/6218:
1 lock held by syz-fuzzer/6544:
 #0: ffff888076cd8f88 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
 #0: ffff888076cd8f88 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1b8/0x9f0 mm/readahead.c:194
1 lock held by syz-executor.2/30839:

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

NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 23330 Comm: kworker/u4:0 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:lock_acquire+0x26c/0x4d0 kernel/locking/lockdep.c:5641
Code: c6 44 2f 17 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 00 01 00 00 0f 85 3d 02 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d <c3> 65 8b 05 ec 8d 9c 7e 85 c0 75 9e 65 8b 05 69 84 9c 7e 83 7c 24
RSP: 0018:ffffc9000a37fbe0 EFLAGS: 00000246
RAX: f568aa66f89c6b00 RBX: ffff88801cae7340 RCX: ffff88801b6bc458
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88806de74c80 R08: dffffc0000000000 R09: fffffbfff1ff35dd
R10: fffffbfff1ff35dd R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880b3a18000 R14: ffff88801cae7350 R15: 000000000000014b
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004635e0 CR3: 000000007191a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000b8fecd19 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 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):
   0:	c6 44 2f 17 00       	movb   $0x0,0x17(%rdi,%rbp,1)
   5:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
   c:	00 00
   e:	48 3b 84 24 00 01 00 	cmp    0x100(%rsp),%rax
  15:	00
  16:	0f 85 3d 02 00 00    	jne    0x259
  1c:	48 8d 65 d8          	lea    -0x28(%rbp),%rsp
  20:	5b                   	pop    %rbx
  21:	41 5c                	pop    %r12
  23:	41 5d                	pop    %r13
  25:	41 5e                	pop    %r14
  27:	41 5f                	pop    %r15
  29:	5d                   	pop    %rbp
* 2a:	c3                   	retq <-- trapping instruction
  2b:	65 8b 05 ec 8d 9c 7e 	mov    %gs:0x7e9c8dec(%rip),%eax        # 0x7e9c8e1e
  32:	85 c0                	test   %eax,%eax
  34:	75 9e                	jne    0xffffffd4
  36:	65 8b 05 69 84 9c 7e 	mov    %gs:0x7e9c8469(%rip),%eax        # 0x7e9c84a6
  3d:	83                   	.byte 0x83
  3e:	7c 24                	jl     0x64