------------[ cut here ]------------ WARNING: CPU: 0 PID: 4957 at net/mptcp/protocol.c:629 __mptcp_move_skbs_from_subflow+0x2cbc/0x2dac net/mptcp/protocol.c:629 Modules linked in: CPU: 0 PID: 4957 Comm: syz.0.15 Not tainted 5.15.168-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __mptcp_move_skbs_from_subflow+0x2cbc/0x2dac net/mptcp/protocol.c:629 lr : __mptcp_move_skbs_from_subflow+0x2cbc/0x2dac net/mptcp/protocol.c:629 sp : ffff800020055c90 x29: ffff800020055e20 x28: 0000000000020000 x27: 0000000000020000 x26: dfff800000000000 x25: 0000000000000000 x24: ffff0000d6d80e08 x23: 0000000000000000 x22: ffff0000ec5bc5f0 x21: ffff0000cc8d084c x20: 00000000000081e5 x19: 0000000000007d00 x18: 0000000000000102 x17: 0000000000000000 x16: ffff8000084c4250 x15: 0000000000000004 x14: 1ffff0000295606a x13: dfff800000000000 x12: 0000000000000001 x11: 0000000000000303 x10: 0000000000000000 x9 : ffff0000d806d1c0 x8 : ffff800011a5f59c x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000008 x3 : ffff800011a5d8d0 x2 : 0000000000000001 x1 : 00000000000081e5 x0 : 0000000000007d00 Call trace: __mptcp_move_skbs_from_subflow+0x2cbc/0x2dac net/mptcp/protocol.c:629 move_skbs_to_msk net/mptcp/protocol.c:741 [inline] mptcp_data_ready+0x188/0x4f4 net/mptcp/protocol.c:784 subflow_data_ready+0x198/0x280 net/mptcp/subflow.c:1337 tcp_data_ready+0x22c/0x454 net/ipv4/tcp_input.c:5081 tcp_data_queue+0x1c14/0x5288 net/ipv4/tcp_input.c:5151 tcp_rcv_established+0xa58/0x1f40 net/ipv4/tcp_input.c:6050 tcp_v4_do_rcv+0x340/0xc70 net/ipv4/tcp_ipv4.c:1731 tcp_v4_rcv+0x1fd8/0x2770 net/ipv4/tcp_ipv4.c:2143 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:5489 [inline] __netif_receive_skb+0x18c/0x400 net/core/dev.c:5603 process_backlog+0x3ec/0x7e0 net/core/dev.c:6480 __napi_poll+0xb4/0x624 net/core/dev.c:7039 napi_poll net/core/dev.c:7106 [inline] net_rx_action+0x500/0xc10 net/core/dev.c:7196 handle_softirqs+0x384/0xdbc kernel/softirq.c:558 __do_softirq kernel/softirq.c:592 [inline] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] do_softirq+0xfc/0x1b0 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:809 [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+0xe90/0x1a04 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+0x420/0x650 net/ipv4/tcp.c:738 mptcp_push_release net/mptcp/protocol.c:1559 [inline] __mptcp_push_pending+0x5ec/0x85c net/mptcp/protocol.c:1627 mptcp_sendmsg+0xc74/0x1a1c net/mptcp/protocol.c:1823 inet_sendmsg+0x15c/0x290 net/ipv4/af_inet.c:836 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] __sys_sendto+0x388/0x4d0 net/socket.c:2063 __do_sys_sendto net/socket.c:2075 [inline] __se_sys_sendto net/socket.c:2071 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2071 __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: 6877 hardirqs last enabled at (6876): [] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (6877): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (6846): [] local_bh_enable+0x10/0x1d0 include/linux/bottom_half.h:31 softirqs last disabled at (6847): [] __do_softirq kernel/softirq.c:592 [inline] softirqs last disabled at (6847): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (6847): [] do_softirq+0xfc/0x1b0 kernel/softirq.c:459 ---[ end trace b9b5b03a5bb98937 ]---