INFO: task kcompactd0:1626 blocked for more than 143 seconds.
      Not tainted 5.12.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0      state:D stack:23352 pid: 1626 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0xa4d/0xf80 kernel/sched/core.c:5073
 schedule+0x14b/0x200 kernel/sched/core.c:5152
 io_schedule+0x83/0x100 kernel/sched/core.c:7209
 wait_on_page_bit_common+0x97a/0x1030 mm/filemap.c:1274
 lock_page include/linux/pagemap.h:610 [inline]
 __unmap_and_move+0x924/0xca0 mm/migrate.c:1050
 unmap_and_move+0x29f/0xd10 mm/migrate.c:1200
 migrate_pages+0x502/0x16f0 mm/migrate.c:1472
 compact_zone+0x2bdc/0x3d50 mm/compaction.c:2365
 proactive_compact_node mm/compaction.c:2611 [inline]
 kcompactd+0x1b9c/0x26c0 mm/compaction.c:2884
 kthread+0x39a/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Showing all locks held in the system:
3 locks held by kworker/u4:5/187:
1 lock held by khungtaskd/1620:
 #0: ffffffff8cd10280 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151
1 lock held by in:imklog/8080:
 #0: ffff88801b5abc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:974
1 lock held by syz-executor.2/26335:

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

NMI backtrace for cpu 1
CPU: 1 PID: 1620 Comm: khungtaskd Not tainted 5.12.0-rc8-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:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 26335 Comm: syz-executor.2 Not tainted 5.12.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_kcov_mode kernel/kcov.c:174 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x33/0x60 kernel/kcov.c:197
Code: 80 ef 01 00 65 8b 15 14 64 83 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 34 15 00 00 00 74 2c 8b 91 10 15 00 00 <83> fa 02 75 21 48 8b 91 18 15 00 00 48 8b 32 48 8d 7e 01 8b 89 14
RSP: 0018:ffffc900184f7878 EFLAGS: 00000246
RAX: ffffffff829c93e0 RBX: ffff88802f630600 RCX: ffff8880250e0000
RDX: 0000000000000002 RSI: 000000000003ffff RDI: ffff88802f630608
RBP: dffffc0000000000 R08: 0000000000000005 R09: ffffffff829c92a7
R10: 0000000000000002 R11: ffff8880250e0000 R12: ffff888086ca6c80
R13: ffffc900184f7b40 R14: ffff88802f630600 R15: ffff88802f6306d0
FS:  00007fa7e18c9700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64b5955000 CR3: 0000000012eb2000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ntfs_lookup_inode_by_name+0x1860/0x2ce0 fs/ntfs/dir.c:381
 check_windows_hibernation_status fs/ntfs/super.c:1274 [inline]
 load_system_files fs/ntfs/super.c:1989 [inline]
 ntfs_fill_super+0x5d2a/0x87b0 fs/ntfs/super.c:2893
 mount_bdev+0x26c/0x3a0 fs/super.c:1367
 legacy_get_tree+0xea/0x180 fs/fs_context.c:592
 vfs_get_tree+0x86/0x270 fs/super.c:1497
 do_new_mount fs/namespace.c:2903 [inline]
 path_mount+0x196f/0x2be0 fs/namespace.c:3233
 do_mount fs/namespace.c:3246 [inline]
 __do_sys_mount fs/namespace.c:3454 [inline]
 __se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3431
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x46797a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa7e18c8fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046797a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fa7e18c9000
RBP: 00007fa7e18c9040 R08: 00007fa7e18c9040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fa7e18c9000 R15: 0000000020086e00