INFO: task kcompactd0:1637 blocked for more than 143 seconds.
      Not tainted 5.13.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0      state:D stack:23576 pid: 1637 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4339 [inline]
 __schedule+0xb98/0x1120 kernel/sched/core.c:5147
 schedule+0x14b/0x200 kernel/sched/core.c:5226
 io_schedule+0x83/0x100 kernel/sched/core.c:7215
 wait_on_page_bit_common+0x97a/0x1030 mm/filemap.c:1301
 lock_page include/linux/pagemap.h:625 [inline]
 __unmap_and_move+0x924/0xca0 mm/migrate.c:1023
 unmap_and_move+0x339/0xd80 mm/migrate.c:1173
 migrate_pages+0x512/0x1730 mm/migrate.c:1447
 compact_zone+0x2d51/0x3d20 mm/compaction.c:2401
 kcompactd_do_work mm/compaction.c:2816 [inline]
 kcompactd+0x8df/0x26c0 mm/compaction.c:2911
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Showing all locks held in the system:
1 lock held by systemd/1:
1 lock held by khungtaskd/1582:
 #0: ffffffff8cf15cc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151
1 lock held by khugepaged/1640:
1 lock held by kswapd1/2132:
1 lock held by systemd-journal/4842:
1 lock held by in:imklog/8109:
 #0: ffff88801b83d9f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:974
3 locks held by kworker/u4:9/830:

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

NMI backtrace for cpu 0
CPU: 0 PID: 1582 Comm: khungtaskd Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x202/0x31e lib/dump_stack.c:120
 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0xcfb/0xd40 kernel/hung_task.c:294
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1940 Comm: kworker/1:23 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:check_preemption_disabled+0x22/0x190 lib/smp_processor_id.c:13
Code: 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 10 49 89 f6 49 89 ff 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 <0f> 1f 44 00 00 65 8b 1d 52 fd 40 76 65 8b 2d 83 57 41 76 89 ee 81
RSP: 0000:ffffc900183cf858 EFLAGS: 00000082
RAX: 06ca22b9aef2ba00 RBX: ffff88808315c338 RCX: ffffffff8161dcc9
RDX: dffffc0000000000 RSI: ffffffff8a2eac80 RDI: ffffffff8a929ec0
RBP: ffffc900183cf960 R08: dffffc0000000000 R09: fffffbfff204ddcc
R10: fffffbfff204ddcc R11: 0000000000000000 R12: 0000000000000004
R13: ffff88808315c270 R14: ffffffff8a2eac80 R15: ffffffff8a929ec0
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2421245f06 CR3: 000000002dc8e000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lockdep_recursion_finish kernel/locking/lockdep.c:438 [inline]
 lockdep_hardirqs_on_prepare+0x3e2/0x750 kernel/locking/lockdep.c:4168
 trace_hardirqs_on+0x6f/0x80 kernel/trace/trace_preemptirq.c:49
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irqrestore+0x8b/0x120 kernel/locking/spinlock.c:191
 __debug_check_no_obj_freed lib/debugobjects.c:997 [inline]
 debug_check_no_obj_freed+0x5a2/0x650 lib/debugobjects.c:1018
 slab_free_hook mm/slub.c:1557 [inline]
 slab_free_freelist_hook+0x161/0x290 mm/slub.c:1607
 slab_free mm/slub.c:3167 [inline]
 kmem_cache_free+0x85/0x170 mm/slub.c:3183
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:586 [inline]
 nsim_dev_trap_report_work+0x7d5/0xb20 drivers/net/netdevsim/dev.c:611
 process_one_work+0x833/0x10c0 kernel/workqueue.c:2276
 worker_thread+0xac1/0x1300 kernel/workqueue.c:2422
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294