------------[ cut here ]------------ WARNING: CPU: 0 PID: 17484 at net/mptcp/subflow.c:1406 subflow_data_ready+0x294/0x4bc net/mptcp/subflow.c:1405 Modules linked in: CPU: 0 PID: 17484 Comm: syz-executor.4 Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : subflow_data_ready+0x294/0x4bc net/mptcp/subflow.c:1405 lr : subflow_data_ready+0x294/0x4bc net/mptcp/subflow.c:1405 sp : ffff800080007070 x29: ffff800080007070 x28: ffff0000c8f3d410 x27: ffff0000c8f3d4e0 x26: 1fffe00024569af3 x25: 0000000000000800 x24: ffff0000f8008400 x23: dfff800000000000 x22: ffff80008e33d3a8 x21: 0000000000000000 x20: ffff0000fb9a2f00 x19: ffff0000c8f3c980 x18: ffff8000800068e0 x17: 0000000000000000 x16: ffff800080515ce8 x15: 0000000000000001 x14: 1fffe000191e7932 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000102 x10: 0000000000000100 x9 : 0000000000000000 x8 : ffff0000cf4e3780 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff80008a61db04 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: subflow_data_ready+0x294/0x4bc net/mptcp/subflow.c:1405 tcp_data_ready+0x22c/0x44c net/ipv4/tcp_input.c:5034 tcp_data_queue+0x1cf8/0x5430 net/ipv4/tcp_input.c:5114 tcp_rcv_state_process+0x204c/0x3e58 net/ipv4/tcp_input.c:6728 tcp_v4_do_rcv+0x5f0/0xe00 net/ipv4/tcp_ipv4.c:1751 tcp_v4_rcv+0x22b8/0x2c74 net/ipv4/tcp_ipv4.c:2151 ip_protocol_deliver_rcu+0x1f8/0x47c net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x23c/0x46c net/ipv4/ip_input.c:233 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:304 ip_local_deliver+0x11c/0x190 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:468 [inline] ip_rcv_finish+0x224/0x250 net/ipv4/ip_input.c:449 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:304 ip_rcv+0x78/0x98 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core net/core/dev.c:5552 [inline] __netif_receive_skb+0x18c/0x400 net/core/dev.c:5666 process_backlog+0x3c0/0x70c net/core/dev.c:5994 __napi_poll+0xb4/0x648 net/core/dev.c:6556 napi_poll net/core/dev.c:6623 [inline] net_rx_action+0x5e4/0xdc4 net/core/dev.c:6756 __do_softirq+0x2d0/0xd54 kernel/softirq.c:553 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:886 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 invoke_softirq kernel/softirq.c:434 [inline] __irq_exit_rcu+0x200/0x494 kernel/softirq.c:632 irq_exit_rcu+0x14/0x84 kernel/softirq.c:644 __el1_irq arch/arm64/kernel/entry-common.c:503 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:517 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:522 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:591 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:176 [inline] arch_local_irq_restore arch/arm64/include/asm/irqflags.h:196 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] __skb_try_recv_datagram+0x198/0x584 net/core/datagram.c:265 __unix_dgram_recvmsg+0x2f8/0xe2c net/unix/af_unix.c:2362 unix_dgram_recvmsg+0xd0/0xe8 net/unix/af_unix.c:2459 sock_recvmsg_nosec+0x90/0xec net/socket.c:1044 ____sys_recvmsg+0x5c0/0x6e8 net/socket.c:2775 ___sys_recvmsg net/socket.c:2819 [inline] do_recvmmsg+0x41c/0xb60 net/socket.c:2913 __sys_recvmmsg net/socket.c:2992 [inline] __do_sys_recvmmsg net/socket.c:3015 [inline] __se_sys_recvmmsg net/socket.c:3008 [inline] __arm64_sys_recvmmsg+0x180/0x23c net/socket.c:3008 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 irq event stamp: 65233 hardirqs last enabled at (65232): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (65232): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (65233): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:436 softirqs last enabled at (61964): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (61964): [] __do_softirq+0xac0/0xd54 kernel/softirq.c:582 softirqs last disabled at (65163): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]---