[ 9407]     0  9407    17634     8455      25       4        0             0 syz-executor1
[ 9424]     0  9424    17601     8454      25       3        0             0 syz-executor1
[ 9427]     0  9427    17667     8459      25       3        0             0 syz-executor1
[ 9466]     0  9466    17667     8456      32       4        0          1000 syz-executor0
INFO: task syz-executor3:10496 blocked for more than 140 seconds.
      Not tainted 4.14.91+ #3
[ 9544]     0  9544    17634     8456      25       4        0             0 syz-executor1
[ 9639]     0  9639    17700     8443      25       4        0          1000 syz-executor0
[ 9688]     0  9688    17700     8443      25       4        0          1000 syz-executor0
[ 9775]     0  9775    17601     8451      24       4        0          1000 syz-executor0
[ 9805]     0  9805    17667     8461      26       4        0          1000 syz-executor4
[ 9953]     0  9953    17634    12753      31       3        0          1000 syz-executor0
[10109]     0 10109    17601     8454      24       3        0             0 syz-executor1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3   D29936 10496   1856 0x00000004
Call Trace:
[10113]     0 10113    17634     8456      24       3        0             0 syz-executor1
 schedule+0x92/0x1c0 kernel/sched/core.c:3490
[10124]     0 10124    17601     8230      25       3        0          1000 syz-executor2
[10235]     0 10235    17632     8460      25       4        0             0 syz-executor1
 __lock_sock+0x12b/0x220 net/core/sock.c:2237
[10335]     0 10335    17667     8457      26       4        0          1000 syz-executor2
 lock_sock_nested+0xe1/0x100 net/core/sock.c:2758
 lock_sock include/net/sock.h:1452 [inline]
 packet_setsockopt+0x885/0x2830 net/packet/af_packet.c:3780
[10407]     0 10407    17601     8232      24       3        0          1000 syz-executor4
[10409]     0 10409    17667     8461      27       4        0             0 syz-executor1
[10456]     0 10456    17766     8493      26       4        0          1000 syz-executor2
[10471]     0 10471    17634     8479      25       4        0             0 syz-executor5
[10522]     0 10522    17697     8460      25       4        0          1000 /group.stat
[10539]     0 10539    17634     8457      25       4        0          1000 /group.stat

Showing all locks held in the system:
[10688]     0 10688    17634     8456      25       4        0          1000 syz-executor4
[10895]     0 10895    17601     8228      24       3        0          1000 syz-executor0
2 locks held by init/1:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffa44b4391>] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354
 #1:  (&ei->i_mmap_sem){++++}, at: [<ffffffffa4b5dfbc>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178
2 locks held by kworker/u4:0/5:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
1 lock held by khungtaskd/23:
 #0:  (tasklist_lock){.+.+}, at: [<ffffffffa45ff97c>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541
2 locks held by kworker/u4:1/64:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:2/366:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by rsyslogd/1632:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffa44b4391>] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354
 #1:  (&ei->i_mmap_sem){++++}, at: [<ffffffffa4b5dfbc>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178
2 locks held by getty/1760:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffffa5136982>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:275
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffffa5131da7>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156
2 locks held by syz-fuzzer/1779:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffa44b4391>] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354
 #1:  (&ei->i_mmap_sem){++++}, at: [<ffffffffa4b5dfbc>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178
1 lock held by syz-executor5/1847:
 #0:  (&xt[i].mutex){+.+.}, at: [<ffffffffa5857a7d>] xt_find_target+0x3d/0x1e0 net/netfilter/x_tables.c:232
2 locks held by kworker/u4:3/1852:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:5/1868:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:6/1876:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by udevd/5781:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffa44b4391>] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354
 #1:  (&ei->i_mmap_sem){++++}, at: [<ffffffffa4b5dfbc>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178
2 locks held by kworker/u4:9/6054:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:10/6056:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:11/6062:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:12/6067:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:13/6070:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:14/6547:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:15/6550:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:16/11968:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:17/11972:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:18/11978:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:19/11985:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:20/12021:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:21/12026:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:22/12033:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:24/18502:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
[10897]     0 10897    17634     8231      25       3        0          1000 syz-executor0
2 locks held by kworker/u4:25/18504:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:27/18508:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:28/18510:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:30/18514:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:31/18516:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:32/18518:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:33/18519:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:34/18522:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:36/18527:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
[10901]     0 10901    17733     8463      26       4        0          1000 syz-executor2
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:38/22034:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:39/22036:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:40/22038:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:29/2655:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:37/2658:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:7/7351:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:26/7353:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:41/7356:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
[10965]     0 10965    17634    12753      31       3        0          1000 syz-executor0
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:43/7359:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by kworker/u4:44/7365:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa4527d15>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffffa4527d4b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
1 lock held by modprobe/10494:
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] inode_lock_shared include/linux/fs.h:725 [inline]
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] do_last fs/namei.c:3360 [inline]
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] path_openat+0x14aa/0x2b70 fs/namei.c:3597
1 lock held by modprobe/10505:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffa488c5c7>] vm_mmap_pgoff+0x147/0x1c0 mm/util.c:331
1 lock held by modprobe/10521:
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] inode_lock_shared include/linux/fs.h:725 [inline]
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] do_last fs/namei.c:3360 [inline]
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] path_openat+0x14aa/0x2b70 fs/namei.c:3597
2 locks held by modprobe/10525:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffa44b4991>] __do_page_fault+0x871/0xb80 arch/x86/mm/fault.c:1361
[11017]     0 11017    17601     8454      24       3        0             0 syz-executor1
 #1:  (&ei->i_mmap_sem
[11020]     0 11020    17667     8458      24       3        0             0 syz-executor1
[11064]     0 11064    17667     8459      27       4        0             0 syz-executor1
){++++}, at: [<ffffffffa4b5dfbc>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178
1 lock held by modprobe/10526:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffa4966885>] setup_arg_pages+0x255/0x710 fs/exec.c:734
1 lock held by modprobe/10529:
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] inode_lock_shared include/linux/fs.h:725 [inline]
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] do_last fs/namei.c:3360 [inline]
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] path_openat+0x14aa/0x2b70 fs/namei.c:3597
1 lock held by modprobe/10532:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffa488c5c7>] vm_mmap_pgoff+0x147/0x1c0 mm/util.c:331
1 lock held by modprobe/10553:
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] inode_lock_shared include/linux/fs.h:725 [inline]
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] do_last fs/namei.c:3360 [inline]
 #0:  (&type->i_mutex_dir_key#3){++++}, at: [<ffffffffa49881da>] path_openat+0x14aa/0x2b70 fs/namei.c:3597
1 lock held by modprobe/10554:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffa4966885>] setup_arg_pages+0x255/0x710 fs/exec.c:734
2 locks held by init/10562:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffa44b4391>] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354
 #1:  (&ei->i_mmap_sem){++++}, at: [<ffffffffa4b5dfbc>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178

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

NMI backtrace for cpu 1
CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.91+ #3
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x10e lib/dump_stack.c:53
 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101
[11070]     0 11070    17667     8459      27       4        0             0 syz-executor1
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10524 Comm: modprobe Not tainted 4.14.91+ #3
task: ffff8880b05a8000 task.stack: ffff888081d38000
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:102 [inline]
RIP: 0010:do_raw_spin_unlock+0xf4/0x210 kernel/locking/spinlock_debug.c:134
RSP: 0000:ffff888081d3ebb0 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 0000000000000297 RCX: 1ffff110160b5104
RDX: 1ffff1103aa9bf6e RSI: 0000000000000002 RDI: ffff8881d54dfb64
RBP: ffff8881d54dfb60 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8880b05a8858 R11: 0000000000000001 R12: ffff8881d54dfb68
R13: ffff8881d54dfb70 R14: 0000000000000297 R15: ffff8881d54dfb60
FS:  0000000000000000(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000459e74 CR3: 0000000186296002 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:159 [inline]
 _raw_spin_unlock_irqrestore+0x23/0x70 kernel/locking/spinlock.c:192
 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline]
 __remove_mapping+0x422/0x560 mm/vmscan.c:758
 shrink_page_list+0x1870/0x32b0 mm/vmscan.c:1311
 shrink_inactive_list+0x39a/0x1170 mm/vmscan.c:1816
 shrink_list mm/vmscan.c:2175 [inline]
 shrink_node_memcg+0x5f9/0x1320 mm/vmscan.c:2440
 shrink_node+0x2fa/0xbf0 mm/vmscan.c:2632
 shrink_zones mm/vmscan.c:2814 [inline]
 do_try_to_free_pages+0x350/0xd80 mm/vmscan.c:2876
 try_to_free_pages+0x20a/0x6c0 mm/vmscan.c:3082
 __perform_reclaim mm/page_alloc.c:3593 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3614 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:4001 [inline]
 __alloc_pages_nodemask+0xac8/0x22e0 mm/page_alloc.c:4210
 __alloc_pages include/linux/gfp.h:461 [inline]
 __alloc_pages_node include/linux/gfp.h:474 [inline]
 alloc_pages_node include/linux/gfp.h:488 [inline]
 alloc_slab_page mm/slub.c:1437 [inline]
 allocate_slab mm/slub.c:1588 [inline]
 new_slab+0x397/0x480 mm/slub.c:1651
Code: 0f 8e ef 00 00 00 65 8b 05 ca e7 a0 5b 39 45 08 0f 85 9d 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 <0f> 85 f5 00 00 00 4c 89 e2 48 c7 45 10 ff ff ff ff 48 b8 00 00