------------[ cut here ]------------ WARNING: CPU: 1 PID: 4637 at net/mptcp/subflow.c:1389 subflow_data_ready+0x251/0x2d0 net/mptcp/subflow.c:1388 Modules linked in: CPU: 1 PID: 4637 Comm: syz.2.59 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:subflow_data_ready+0x251/0x2d0 net/mptcp/subflow.c:1388 Code: 41 5c 41 5d 41 5e 41 5f 5d c3 e8 6a bd 89 f7 48 89 df 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d e9 64 0d 00 00 e8 4f bd 89 f7 <0f> 0b e9 67 ff ff ff 44 89 f9 80 e1 07 38 c1 0f 8c f3 fd ff ff 4c RSP: 0018:ffffc900032376d8 EFLAGS: 00010293 RAX: ffffffff89f72281 RBX: ffff88814caab300 RCX: ffff8880301cd940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100b1312a9 R10: ffffed100b1312a9 R11: 1ffff1100b1312a8 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff88805d9ab260 R15: 0000000000000000 FS: 00007f784aff66c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000019f000 CR3: 00000000641a1000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcp_data_queue+0x2168/0x59a0 net/ipv4/tcp_input.c:5181 tcp_rcv_state_process+0x1b5f/0x40d0 net/ipv4/tcp_input.c:6791 tcp_v6_do_rcv+0x934/0x1320 net/ipv6/tcp_ipv6.c:1510 sk_backlog_rcv include/net/sock.h:1125 [inline] __release_sock+0x1e1/0x450 net/core/sock.c:2945 release_sock+0x5b/0x1b0 net/core/sock.c:3511 inet_stream_connect+0x85/0xa0 net/ipv4/af_inet.c:740 mptcp_connect+0x37a/0x580 net/mptcp/protocol.c:3885 __inet_stream_connect+0x298/0xea0 net/ipv4/af_inet.c:668 inet_stream_connect+0x62/0xa0 net/ipv4/af_inet.c:739 __sys_connect_file net/socket.c:2011 [inline] __sys_connect+0x389/0x410 net/socket.c:2028 __do_sys_connect net/socket.c:2038 [inline] __se_sys_connect net/socket.c:2035 [inline] __x64_sys_connect+0x76/0x80 net/socket.c:2035 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f784cd8f749 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:00007f784aff6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f784cfe6090 RCX: 00007f784cd8f749 RDX: 000000000000001c RSI: 0000200000000040 RDI: 0000000000000003 RBP: 00007f784ce13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f784cfe6128 R14: 00007f784cfe6090 R15: 00007ffd5f1becd8