------------[ cut here ]------------
WARNING: CPU: 0 PID: 13090 at net/mptcp/subflow.c:1519 subflow_data_ready+0x40b/0x7c0 net/mptcp/subflow.c:1519
Modules linked in:
CPU: 0 UID: 0 PID: 13090 Comm: syz.3.1760 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:subflow_data_ready+0x40b/0x7c0 net/mptcp/subflow.c:1519
Code: 89 ee e8 a8 cb 72 f6 40 84 ed 75 21 e8 be d0 72 f6 44 89 fe bf 07 00 00 00 e8 f1 cb 72 f6 41 83 ff 07 74 09 e8 a6 d0 72 f6 90 <0f> 0b 90 e8 9d d0 72 f6 48 89 df e8 e5 ad ff ff 31 ff 89 c5 89 c6
RSP: 0018:ffffc9000413f7a0 EFLAGS: 00010287
RAX: 0000000000001c03 RBX: ffff888025c04c80 RCX: ffffc90010c37000
RDX: 0000000000080000 RSI: ffffffff8b4986ea RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000007
R10: 000000000000000b R11: 0000000000000001 R12: ffff888037900000
R13: 1ffff92000827ef4 R14: ffff8880287fb800 R15: 000000000000000b
FS:  00007f78d61b26c0(0000) GS:ffff888124a0d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31509ff8 CR3: 0000000031610000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 tcp_data_ready+0x110/0x550 net/ipv4/tcp_input.c:5355
 tcp_data_queue+0x1aa6/0x5000 net/ipv4/tcp_input.c:5445
 tcp_rcv_state_process+0xfb6/0x6490 net/ipv4/tcp_input.c:7159
 tcp_v4_do_rcv+0x68e/0x10a0 net/ipv4/tcp_ipv4.c:1954
 sk_backlog_rcv include/net/sock.h:1158 [inline]
 __release_sock+0x361/0x450 net/core/sock.c:3180
 release_sock+0x5a/0x220 net/core/sock.c:3735
 mptcp_connect+0x914/0xae0 net/mptcp/protocol.c:3854
 __inet_stream_connect+0x915/0xf50 net/ipv4/af_inet.c:679
 inet_stream_connect+0x57/0xa0 net/ipv4/af_inet.c:750
 __sys_connect_file+0x141/0x1a0 net/socket.c:2102
 __sys_connect+0x13b/0x160 net/socket.c:2121
 __do_sys_connect net/socket.c:2127 [inline]
 __se_sys_connect net/socket.c:2124 [inline]
 __x64_sys_connect+0x72/0xb0 net/socket.c:2124
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78d838f7c9
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:00007f78d61b2038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f78d85e6270 RCX: 00007f78d838f7c9
RDX: 0000000000000054 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007f78d8413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f78d85e6308 R14: 00007f78d85e6270 R15: 00007ffc862a4838
 </TASK>