------------[ cut here ]------------ WARNING: CPU: 1 PID: 17559 at net/mptcp/protocol.c:627 __mptcp_move_skbs_from_subflow+0x2b88/0x2c78 net/mptcp/protocol.c:627 Modules linked in: CPU: 1 PID: 17559 Comm: syz-executor.2 Not tainted 5.15.147-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __mptcp_move_skbs_from_subflow+0x2b88/0x2c78 net/mptcp/protocol.c:627 lr : __mptcp_move_skbs_from_subflow+0x2b88/0x2c78 net/mptcp/protocol.c:627 sp : ffff80001eb956c0 x29: ffff80001eb95840 x28: 0000000000020000 x27: ffff0000fe1493d0 x26: 00000000000004d4 x25: dfff800000000000 x24: 0000000000000000 x23: 0000000000000000 x22: ffff0000fe148d88 x21: ffff0000ff91744c x20: ffff0001034e9780 x19: 00000000000000b8 x18: 0000000000000102 x17: 0000000000000000 x16: ffff8000084c18ac x15: 0000000000000004 x14: 1ffff0000292406a x13: dfff800000000000 x12: 0000000000000001 x11: 0000000000000303 x10: 0000000000000000 x9 : ffff0000c65cb680 x8 : ffff800011929864 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800011927bd0 x2 : 0000000000000001 x1 : 00000000000004d4 x0 : 00000000000000b8 Call trace: __mptcp_move_skbs_from_subflow+0x2b88/0x2c78 net/mptcp/protocol.c:627 move_skbs_to_msk net/mptcp/protocol.c:699 [inline] mptcp_data_ready+0x274/0x5f8 net/mptcp/protocol.c:744 subflow_data_ready+0x198/0x280 net/mptcp/subflow.c:1351 tcp_data_ready+0x22c/0x454 net/ipv4/tcp_input.c:5018 tcp_data_queue+0x1c14/0x5288 net/ipv4/tcp_input.c:5088 tcp_rcv_established+0xa58/0x1f40 net/ipv4/tcp_input.c:5987 tcp_v4_do_rcv+0x340/0xc70 net/ipv4/tcp_ipv4.c:1727 tcp_v4_rcv+0x1fd8/0x2770 net/ipv4/tcp_ipv4.c:2130 ip_protocol_deliver_rcu+0x36c/0x770 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1b8/0x30c net/ipv4/ip_input.c:231 NF_HOOK+0x324/0x3d0 include/linux/netfilter.h:302 ip_local_deliver+0x11c/0x190 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:453 [inline] ip_rcv_finish+0x22c/0x264 net/ipv4/ip_input.c:447 NF_HOOK+0x324/0x3d0 include/linux/netfilter.h:302 ip_rcv+0x78/0x98 net/ipv4/ip_input.c:566 __netif_receive_skb_one_core net/core/dev.c:5485 [inline] __netif_receive_skb+0x18c/0x400 net/core/dev.c:5599 process_backlog+0x3ec/0x7e0 net/core/dev.c:6476 __napi_poll+0xb4/0x624 net/core/dev.c:7035 napi_poll net/core/dev.c:7102 [inline] net_rx_action+0x500/0xc10 net/core/dev.c:7189 __do_softirq+0x344/0xdb0 kernel/softirq.c:558 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] do_softirq+0xf8/0x1ac kernel/softirq.c:459 __local_bh_enable_ip+0x298/0x470 kernel/softirq.c:383 local_bh_enable+0x28/0x1d0 include/linux/bottom_half.h:32 rcu_read_unlock_bh include/linux/rcupdate.h:766 [inline] ip_finish_output2+0xe78/0x131c net/ipv4/ip_output.c:229 __ip_finish_output+0x1b0/0x458 ip_finish_output+0x40/0x218 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip_output+0x330/0x49c net/ipv4/ip_output.c:430 dst_output include/net/dst.h:443 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] __ip_queue_xmit+0xe70/0x1930 net/ipv4/ip_output.c:532 ip_queue_xmit+0x5c/0x78 net/ipv4/ip_output.c:546 __tcp_transmit_skb+0x1944/0x31e8 net/ipv4/tcp_output.c:1402 tcp_transmit_skb net/ipv4/tcp_output.c:1420 [inline] tcp_mtu_probe net/ipv4/tcp_output.c:2454 [inline] tcp_write_xmit+0x46f8/0x4dc0 net/ipv4/tcp_output.c:2630 __tcp_push_pending_frames+0x98/0x228 net/ipv4/tcp_output.c:2890 tcp_push_pending_frames include/net/tcp.h:1915 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5493 [inline] tcp_rcv_established+0xab4/0x1f40 net/ipv4/tcp_input.c:5989 tcp_v4_do_rcv+0x340/0xc70 net/ipv4/tcp_ipv4.c:1727 sk_backlog_rcv include/net/sock.h:1059 [inline] __release_sock+0x1a8/0x408 net/core/sock.c:2713 release_sock+0x68/0x270 net/core/sock.c:3254 __mptcp_push_pending+0x5f4/0x85c mptcp_sendmsg+0xc74/0x1a1c net/mptcp/protocol.c:1780 inet6_sendmsg+0xb4/0xd8 net/ipv6/af_inet6.c:657 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x584/0x870 net/socket.c:2431 ___sys_sendmsg+0x214/0x294 net/socket.c:2485 __sys_sendmmsg+0x23c/0x648 net/socket.c:2571 __do_sys_sendmmsg net/socket.c:2600 [inline] __se_sys_sendmmsg net/socket.c:2597 [inline] __arm64_sys_sendmmsg+0xa0/0xbc net/socket.c:2597 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 5741 hardirqs last enabled at (5740): [] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (5741): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (5716): [] local_bh_enable+0x10/0x1d0 include/linux/bottom_half.h:31 softirqs last disabled at (5717): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (5717): [] do_softirq+0xf8/0x1ac kernel/softirq.c:459 ---[ end trace 49ba9982022219fe ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 17559 at net/mptcp/protocol.c:630 __mptcp_move_skbs_from_subflow+0x1ea0/0x2c78 net/mptcp/protocol.c:630 Modules linked in: CPU: 1 PID: 17559 Comm: syz-executor.2 Tainted: G W 5.15.147-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __mptcp_move_skbs_from_subflow+0x1ea0/0x2c78 net/mptcp/protocol.c:630 lr : __mptcp_move_skbs_from_subflow+0x1ea0/0x2c78 net/mptcp/protocol.c:630 sp : ffff80001eb956c0 x29: ffff80001eb95840 x28: 1fffe000191b202d x27: 00000000fffffb2c x26: 0000000000000fec x25: dfff800000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 00000000000000b8 x21: 000000006fad935c x20: ffff0000c8d90140 x19: ffff0000ff916dc0 x18: 0000000000000102 x17: 0000000000000000 x16: ffff8000084c18ac x15: 0000000000000001 x14: 1ffff0000292406a x13: dfff800000000000 x12: ffff700003d72af8 x11: 0000000000000303 x10: 0000000000000000 x9 : ffff0000c65cb680 x8 : ffff800011928b7c x7 : ffff80001191c688 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000083025dc x2 : ffff80001eb958c0 x1 : 00000000fffffb2c x0 : 0000000000000b18 Call trace: __mptcp_move_skbs_from_subflow+0x1ea0/0x2c78 net/mptcp/protocol.c:630 move_skbs_to_msk net/mptcp/protocol.c:699 [inline] mptcp_data_ready+0x274/0x5f8 net/mptcp/protocol.c:744 subflow_data_ready+0x198/0x280 net/mptcp/subflow.c:1351 tcp_data_ready+0x22c/0x454 net/ipv4/tcp_input.c:5018 tcp_data_queue+0x1c14/0x5288 net/ipv4/tcp_input.c:5088 tcp_rcv_established+0xa58/0x1f40 net/ipv4/tcp_input.c:5987 tcp_v4_do_rcv+0x340/0xc70 net/ipv4/tcp_ipv4.c:1727 tcp_v4_rcv+0x1fd8/0x2770 net/ipv4/tcp_ipv4.c:2130 ip_protocol_deliver_rcu+0x36c/0x770 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1b8/0x30c net/ipv4/ip_input.c:231 NF_HOOK+0x324/0x3d0 include/linux/netfilter.h:302 ip_local_deliver+0x11c/0x190 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:453 [inline] ip_rcv_finish+0x22c/0x264 net/ipv4/ip_input.c:447 NF_HOOK+0x324/0x3d0 include/linux/netfilter.h:302 ip_rcv+0x78/0x98 net/ipv4/ip_input.c:566 __netif_receive_skb_one_core net/core/dev.c:5485 [inline] __netif_receive_skb+0x18c/0x400 net/core/dev.c:5599 process_backlog+0x3ec/0x7e0 net/core/dev.c:6476 __napi_poll+0xb4/0x624 net/core/dev.c:7035 napi_poll net/core/dev.c:7102 [inline] net_rx_action+0x500/0xc10 net/core/dev.c:7189 __do_softirq+0x344/0xdb0 kernel/softirq.c:558 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] do_softirq+0xf8/0x1ac kernel/softirq.c:459 __local_bh_enable_ip+0x298/0x470 kernel/softirq.c:383 local_bh_enable+0x28/0x1d0 include/linux/bottom_half.h:32 rcu_read_unlock_bh include/linux/rcupdate.h:766 [inline] ip_finish_output2+0xe78/0x131c net/ipv4/ip_output.c:229 __ip_finish_output+0x1b0/0x458 ip_finish_output+0x40/0x218 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip_output+0x330/0x49c net/ipv4/ip_output.c:430 dst_output include/net/dst.h:443 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] __ip_queue_xmit+0xe70/0x1930 net/ipv4/ip_output.c:532 ip_queue_xmit+0x5c/0x78 net/ipv4/ip_output.c:546 __tcp_transmit_skb+0x1944/0x31e8 net/ipv4/tcp_output.c:1402 tcp_transmit_skb net/ipv4/tcp_output.c:1420 [inline] tcp_write_xmit+0x12bc/0x4dc0 net/ipv4/tcp_output.c:2705 __tcp_push_pending_frames+0x98/0x228 net/ipv4/tcp_output.c:2890 tcp_push_pending_frames include/net/tcp.h:1915 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5493 [inline] tcp_rcv_established+0xab4/0x1f40 net/ipv4/tcp_input.c:5989 tcp_v4_do_rcv+0x340/0xc70 net/ipv4/tcp_ipv4.c:1727 sk_backlog_rcv include/net/sock.h:1059 [inline] __release_sock+0x1a8/0x408 net/core/sock.c:2713 release_sock+0x68/0x270 net/core/sock.c:3254 __mptcp_push_pending+0x5f4/0x85c mptcp_sendmsg+0xc74/0x1a1c net/mptcp/protocol.c:1780 inet6_sendmsg+0xb4/0xd8 net/ipv6/af_inet6.c:657 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x584/0x870 net/socket.c:2431 ___sys_sendmsg+0x214/0x294 net/socket.c:2485 __sys_sendmmsg+0x23c/0x648 net/socket.c:2571 __do_sys_sendmmsg net/socket.c:2600 [inline] __se_sys_sendmmsg net/socket.c:2597 [inline] __arm64_sys_sendmmsg+0xa0/0xbc net/socket.c:2597 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 5981 hardirqs last enabled at (5980): [] __local_bh_enable_ip+0x230/0x470 kernel/softirq.c:388 hardirqs last disabled at (5981): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (5958): [] local_bh_enable+0x10/0x1d0 include/linux/bottom_half.h:31 softirqs last disabled at (5959): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (5959): [] do_softirq+0xf8/0x1ac kernel/softirq.c:459 ---[ end trace 49ba9982022219ff ]--- TCP: request_sock_subflow_v4: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_subflow_v4: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters.