------------[ cut here ]------------
WARNING: CPU: 1 PID: 9867 at net/mptcp/subflow.c:1516 subflow_data_ready+0x4b8/0x7e0
Modules linked in:
CPU: 1 UID: 0 PID: 9867 Comm: syz.1.1048 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:subflow_data_ready+0x4b8/0x7e0
Code: 0f 0b 90 90 e9 bc fc ff ff e8 64 01 5a f6 48 89 df 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 6e 0e 00 00 e8 49 01 5a f6 90 <0f> 0b 90 e9 e5 fd ff ff 90 0f 0b 90 43 0f b6 04 2f 84 c0 0f 85 a1
RSP: 0018:ffffc90009227420 EFLAGS: 00010283
RAX: ffffffff8b65a9e7 RBX: ffff888031362880 RCX: 0000000000080000
RDX: ffffc90004009000 RSI: 0000000000000dd2 RDI: 0000000000000dd3
RBP: 0000000000000000 R08: ffff888107f795a7 R09: 1ffff11020fef2b4
R10: dffffc0000000000 R11: ffffed1020fef2b5 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888107f78c80 R15: 0000000000000000
FS:  00007fcb5e87d6c0(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f95da686fb8 CR3: 000000003390a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 tcp_data_queue+0x54b/0x6380
 tcp_rcv_state_process+0x2767/0x4140
 tcp_v6_do_rcv+0x89d/0x13f0
 __release_sock+0x1c5/0x350
 __tcp_close+0x6c5/0xde0
 __mptcp_close_ssk+0x3d7/0xfd0
 mptcp_destroy_common+0x152/0x320
 mptcp_destroy+0x84/0x120
 __mptcp_destroy_sock+0x156/0x350
 __mptcp_close+0x76a/0xb00
 mptcp_close+0x28/0x1a0
 inet_release+0x144/0x190
 sock_close+0xc3/0x240
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 get_signal+0x11ed/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcb5d98ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcb5e87d038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffe00 RBX: 00007fcb5dbc5fa0 RCX: 00007fcb5d98ebe9
RDX: 000000000000001c RSI: 0000200000000040 RDI: 0000000000000008
RBP: 00007fcb5da11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcb5dbc6038 R14: 00007fcb5dbc5fa0 R15: 00007ffd4a4f97d8
 </TASK>
