entry_SYSCALL_64_after_hwframe+0x44/0xae
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4179 at lib/ref_tracker.c:38 spin_unlock_irqrestore include/linux/spinlock.h:404 [inline]
WARNING: CPU: 0 PID: 4179 at lib/ref_tracker.c:38 ref_tracker_dir_exit+0x432/0x470 lib/ref_tracker.c:37
Modules linked in:
CPU: 0 PID: 4179 Comm: kworker/0:7 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events mptcp_worker
RIP: 0010:ref_tracker_dir_exit+0x432/0x470 lib/ref_tracker.c:38
Code: c1 0f 8c b9 fe ff ff 48 89 df e8 99 15 8d fd e9 ac fe ff ff e8 6f aa 41 fd 48 8b 1c 24 48 89 df 48 8b 74 24 18 e8 7e d7 cf 05 <0f> 0b e9 d9 fd ff ff e8 52 aa 41 fd 0f 0b e9 0d fe ff ff 89 d9 80
RSP: 0018:ffffc90003aafaa0 EFLAGS: 00010246
RAX: 757ae72d0ed98000 RBX: ffff888022bbb650 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: dead000000000100 R08: dffffc0000000000 R09: fffffbfff1ff940b
R10: fffffbfff1ff940b R11: 0000000000000000 R12: ffff888022bbb698
R13: dead000000000122 R14: dffffc0000000000 R15: ffff888022bbb698
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7ff31e4025 CR3: 000000007ed42000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __put_net+0x15/0x60 net/core/net_namespace.c:640
 put_net include/net/net_namespace.h:268 [inline]
 put_net_track include/net/net_namespace.h:342 [inline]
 __sk_destruct+0x38e/0x5e0 net/core/sock.c:2042
 sock_put include/net/sock.h:1912 [inline]
 mptcp_worker+0x9f6/0xf30 net/mptcp/protocol.c:2513
 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>