TCP: request_sock_subflow_v4: Possible SYN flooding on port [::]:20002. Sending cookies.
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WARNING: CPU: 3 PID: 13022 at net/mptcp/protocol.c:695 __mptcp_move_skbs_from_subflow+0x1627/0x24d0 net/mptcp/protocol.c:695
Modules linked in:
CPU: 3 UID: 0 PID: 13022 Comm: syz.2.2111 Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__mptcp_move_skbs_from_subflow+0x1627/0x24d0 net/mptcp/protocol.c:695
Code: 02 48 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 86 0d 00 00 c6 43 7f 00 e9 22 f0 ff ff 48 8b ac 24 a0 00 00 00 e8 9a 22 99 f6 90 <0f> 0b 90 e9 49 f3 ff ff e8 8c 22 99 f6 90 0f 0b 90 e9 df f0 ff ff
RSP: 0018:ffffc900005f0408 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000000000081e5 RCX: ffffffff8af377c2
RDX: ffff88802120a440 RSI: ffffffff8af38526 RDI: 0000000000000004
RBP: ffffc900005f0528 R08: 0000000000000004 R09: 00000000000081e5
R10: 00000000000055f0 R11: 0000000000000000 R12: ffff8880606b2668
R13: 0000000000000000 R14: ffff8880606b2580 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff88802b700000(0063) knlGS:00000000f56b6b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffdfa50000 CR3: 000000006d06c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
move_skbs_to_msk net/mptcp/protocol.c:811 [inline]
mptcp_data_ready+0x30e/0x8e0 net/mptcp/protocol.c:854
subflow_data_ready+0x51d/0x7d0 net/mptcp/subflow.c:1490
tcp_data_ready+0x146/0x5b0 net/ipv4/tcp_input.c:5193
tcp_data_queue+0x1a6f/0x5280 net/ipv4/tcp_input.c:5283
tcp_rcv_established+0x8b1/0x21c0 net/ipv4/tcp_input.c:6237
tcp_v4_do_rcv+0x5ca/0xa90 net/ipv4/tcp_ipv4.c:1915
tcp_v4_rcv+0x33bc/0x43b0 net/ipv4/tcp_ipv4.c:2350
ip_protocol_deliver_rcu+0xba/0x4c0 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254
dst_input include/net/dst.h:460 [inline]
ip_rcv_finish net/ipv4/ip_input.c:449 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip_rcv+0x2c3/0x5d0 net/ipv4/ip_input.c:569
__netif_receive_skb_one_core+0x199/0x1e0 net/core/dev.c:5666
__netif_receive_skb+0x1d/0x160 net/core/dev.c:5779
process_backlog+0x443/0x15f0 net/core/dev.c:6111
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6775
napi_poll net/core/dev.c:6844 [inline]
net_rx_action+0xa92/0x1010 net/core/dev.c:6966
handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
do_softirq kernel/softirq.c:455 [inline]
do_softirq+0xb2/0xf0 kernel/softirq.c:442
__local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]
__dev_queue_xmit+0x887/0x4350 net/core/dev.c:4455
dev_queue_xmit include/linux/netdevice.h:3094 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip_finish_output2+0x16d5/0x2530 net/ipv4/ip_output.c:236
__ip_finish_output net/ipv4/ip_output.c:314 [inline]
__ip_finish_output+0x49e/0x950 net/ipv4/ip_output.c:296
ip_finish_output+0x31/0x310 net/ipv4/ip_output.c:324
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip_output+0x13b/0x2a0 net/ipv4/ip_output.c:434
dst_output include/net/dst.h:450 [inline]
ip_local_out+0x33e/0x4a0 net/ipv4/ip_output.c:130
__ip_queue_xmit+0x747/0x1940 net/ipv4/ip_output.c:536
__tcp_transmit_skb+0x2a3a/0x3da0 net/ipv4/tcp_output.c:1466
tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
tcp_mtu_probe net/ipv4/tcp_output.c:2547 [inline]
tcp_write_xmit+0x7d13/0x8b80 net/ipv4/tcp_output.c:2752
__tcp_push_pending_frames+0xaf/0x390 net/ipv4/tcp_output.c:3015
tcp_push_pending_frames include/net/tcp.h:2107 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5714 [inline]
tcp_rcv_established+0x93a/0x21c0 net/ipv4/tcp_input.c:6239
tcp_v4_do_rcv+0x5ca/0xa90 net/ipv4/tcp_ipv4.c:1915
sk_backlog_rcv include/net/sock.h:1113 [inline]
__release_sock+0x31b/0x400 net/core/sock.c:3072
release_sock+0x5a/0x220 net/core/sock.c:3626
__mptcp_push_pending+0x400/0x560 net/mptcp/protocol.c:1625
mptcp_sendmsg+0xce5/0x1f20 net/mptcp/protocol.c:1903
inet_sendmsg+0x119/0x140 net/ipv4/af_inet.c:853
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg net/socket.c:744 [inline]
__sys_sendto+0x426/0x4d0 net/socket.c:2209
__do_sys_sendto net/socket.c:2221 [inline]
__se_sys_sendto net/socket.c:2217 [inline]
__ia32_sys_sendto+0xdd/0x1b0 net/socket.c:2217
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf73ce579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f56b656c EFLAGS: 00000296 ORIG_RAX: 0000000000000171
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020000040
RDX: 00000000ffffff4c RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi