------------[ cut here ]------------
WARNING: CPU: 0 PID: 15 at net/mptcp/subflow.c:1389 subflow_data_ready+0x1d0/0x22c net/mptcp/subflow.c:1388
Modules linked in:
CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 42400005 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : subflow_data_ready+0x1d0/0x22c net/mptcp/subflow.c:1388
lr : subflow_data_ready+0x1d0/0x22c net/mptcp/subflow.c:1388
sp : ffff80001ca06f60
x29: ffff80001ca06f60 x28: ffff0000c4def29c x27: dfff800000000000
x26: ffff0000d6e24c80 x25: 00000000f1f29206 x24: 0000000000000100
x23: ffff0000f2faca00 x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000fc179900 x19: ffff0000d6e24c80 x18: ffff800011b7bf60
x17: ffff800018338000 x16: ffff8000082d9364 x15: 0000000000000000
x14: 0000000000000001 x13: 1fffe0001adc4992 x12: 0000000000ff0100
x11: ff00800011878084 x10: 0000000000000000 x9 : ffff800011878084
x8 : ffff0000c09b3780 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff800011877f04
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 subflow_data_ready+0x1d0/0x22c net/mptcp/subflow.c:1388
 tcp_data_ready+0x21c/0x428 net/ipv4/tcp_input.c:5107
 tcp_data_queue+0x19e4/0x474c net/ipv4/tcp_input.c:5181
 tcp_rcv_established+0xa30/0x1d20 net/ipv4/tcp_input.c:6113
 tcp_v4_do_rcv+0x38c/0xa7c net/ipv4/tcp_ipv4.c:1683
 tcp_v4_rcv+0x1f2c/0x24cc net/ipv4/tcp_ipv4.c:2114
 ip_protocol_deliver_rcu+0x350/0x778 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x250/0x488 net/ipv4/ip_input.c:233
 NF_HOOK+0x2dc/0x36c include/linux/netfilter.h:302
 ip_local_deliver+0x120/0x194 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:463 [inline]
 ip_rcv_finish+0x220/0x24c net/ipv4/ip_input.c:449
 NF_HOOK+0x2dc/0x36c include/linux/netfilter.h:302
 ip_rcv+0x7c/0x9c net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core net/core/dev.c:5581 [inline]
 __netif_receive_skb+0xcc/0x2a8 net/core/dev.c:5695
 process_backlog+0x408/0x710 net/core/dev.c:6023
 __napi_poll+0xb4/0x3f0 net/core/dev.c:6590
 napi_poll net/core/dev.c:6657 [inline]
 net_rx_action+0x514/0xb18 net/core/dev.c:6771
 handle_softirqs+0x318/0xc60 kernel/softirq.c:596
 run_ksoftirqd+0x7c/0x2ac kernel/softirq.c:968
 smpboot_thread_fn+0x4b0/0x964 kernel/smpboot.c:164
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
irq event stamp: 1504395
hardirqs last  enabled at (1504394): [<ffff800011a1e1dc>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last  enabled at (1504394): [<ffff800011a1e1dc>] exit_to_kernel_mode+0xcc/0xfc arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (1504395): [<ffff800011a1c234>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1504362): [<ffff8000081ac37c>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (1504362): [<ffff8000081ac37c>] handle_softirqs+0xaec/0xc60 kernel/softirq.c:624
softirqs last disabled at (1504367): [<ffff8000081af2f4>] run_ksoftirqd+0x7c/0x2ac kernel/softirq.c:968
---[ end trace 0000000000000000 ]---
vkms_vblank_simulate: vblank timer overrun