------------[ cut here ]------------
WARNING: CPU: 0 PID: 3731 at net/ipv4/af_inet.c:153 inet_sock_destruct+0x6b9/0x880 net/ipv4/af_inet.c:153
Modules linked in:
CPU: 0 PID: 3731 Comm: kworker/0:7 Not tainted 5.18.0-rc3-syzkaller-01398-gcc271ab86606 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events mptcp_worker
RIP: 0010:inet_sock_destruct+0x6b9/0x880 net/ipv4/af_inet.c:153
Code: 41 8b 9c 24 30 02 00 00 e9 f2 fe ff ff e8 6f 28 9b f9 0f 0b e9 df fd ff ff e8 63 28 9b f9 0f 0b e9 30 fe ff ff e8 57 28 9b f9 <0f> 0b e9 6b fe ff ff e8 4b 28 9b f9 0f 0b e9 d8 fe ff ff e8 4f ba
RSP: 0018:ffffc9000332fa68 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000000228c8 RCX: 0000000000000000
RDX: ffff888016105700 RSI: ffffffff87de0759 RDI: 0000000000000003
RBP: ffff88801b198028 R08: 0000000000000000 R09: ffff88801b19827f
R10: ffffffff87de05c3 R11: 0000000000000000 R12: ffff88801b198000
R13: ffff88801b19827c R14: 0000000000000003 R15: ffff88801ae2b458
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd1c2f9400f CR3: 0000000024a51000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __sk_destruct+0x4d/0x710 net/core/sock.c:2048
 sk_destruct+0x131/0x180 net/core/sock.c:2096
 __sk_free+0xef/0x3d0 net/core/sock.c:2107
 sk_free+0x78/0xa0 net/core/sock.c:2118
 sock_put include/net/sock.h:1925 [inline]
 __mptcp_close_ssk+0x4f5/0x700 net/mptcp/protocol.c:2333
 __mptcp_destroy_sock+0x2aa/0x680 net/mptcp/protocol.c:2766
 mptcp_worker+0x767/0xbb0 net/mptcp/protocol.c:2528
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>