------------[ cut here ]------------
WARNING: CPU: 0 PID: 3640 at net/ipv4/af_inet.c:152 inet_sock_destruct+0x6af/0x880 net/ipv4/af_inet.c:152
Modules linked in:
CPU: 0 PID: 3640 Comm: kworker/0:6 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events mptcp_worker
RIP: 0010:inet_sock_destruct+0x6af/0x880 net/ipv4/af_inet.c:152
Code: 41 8b 9c 24 18 02 00 00 e9 f2 fe ff ff e8 c9 b9 b8 f9 0f 0b e9 df fd ff ff e8 bd b9 b8 f9 0f 0b e9 30 fe ff ff e8 b1 b9 b8 f9 <0f> 0b e9 6b fe ff ff e8 a5 b9 b8 f9 0f 0b e9 d8 fe ff ff e8 c9 f3
RSP: 0018:ffffc90002a67a70 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000000a65e0 RCX: 0000000000000000
RDX: ffff88807b0fe080 RSI: ffffffff87be2b2f RDI: 0000000000000003
RBP: ffff88801b7f6028 R08: 0000000000000000 R09: ffff88801b7f6277
R10: ffffffff87be2999 R11: 0000000000000000 R12: ffff88801b7f6000
R13: ffff88801b7f6274 R14: 0000000000000003 R15: ffffc90002a67bd0
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd32d400d8 CR3: 000000001db72000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __sk_destruct+0x4b/0x900 net/core/sock.c:2012
 sk_destruct+0xbd/0xe0 net/core/sock.c:2057
 __sk_free+0xef/0x3d0 net/core/sock.c:2068
 sk_free+0x78/0xa0 net/core/sock.c:2079
 sock_put include/net/sock.h:1878 [inline]
 __mptcp_close_ssk+0x435/0x590 net/mptcp/protocol.c:2241
 __mptcp_destroy_sock+0x35f/0x830 net/mptcp/protocol.c:2667
 mptcp_worker+0x7aa/0xc10 net/mptcp/protocol.c:2433
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>