vkms_vblank_simulate: vblank timer overrun
------------[ cut here ]------------
WARNING: CPU: 1 PID: 21 at net/ipv4/tcp_input.c:2615 tcp_cwnd_reduction+0x329/0x390 net/ipv4/tcp_input.c:2615
Modules linked in:
CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 5.18.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tcp_cwnd_reduction+0x329/0x390 net/ipv4/tcp_input.c:2615
Code: 88 09 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 da 40 b2 f9 e8 d5 40 b2 f9 44 39 e5 41 0f 4f ec eb 81 e8 c7 40 b2 f9 <0f> 0b eb d6 e8 ee cf fd f9 e9 33 fd ff ff e8 e4 cf fd f9 e9 1c fe
RSP: 0018:ffffc900001b7590 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880460be000 RCX: 0000000000000100
RDX: ffff888011a39d00 RSI: ffffffff87c6d8a9 RDI: 0000000000000003
RBP: ffffc900001b7790 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff87c6d5fb R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000004 R15: ffff8880460be000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f175536c058 CR3: 000000003e373000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tcp_cong_control net/ipv4/tcp_input.c:3487 [inline]
 tcp_ack+0x40f4/0x5900 net/ipv4/tcp_input.c:3891
 tcp_rcv_established+0x5e8/0x2020 net/ipv4/tcp_input.c:5959
 tcp_v4_do_rcv+0x66c/0x980 net/ipv4/tcp_ipv4.c:1660
 tcp_v4_rcv+0x380f/0x3bc0 net/ipv4/tcp_ipv4.c:2074
 ip_protocol_deliver_rcu+0xa3/0xb30 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2ee/0x4c0 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:461 [inline]
 ip_rcv_finish+0x1cb/0x2f0 net/ipv4/ip_input.c:437
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:556
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5405
 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5519
 process_backlog+0x3a0/0x7c0 net/core/dev.c:5847
 __napi_poll+0xb3/0x6e0 net/core/dev.c:6413
 napi_poll net/core/dev.c:6480 [inline]
 net_rx_action+0x8ec/0xc60 net/core/dev.c:6567
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 run_ksoftirqd kernel/softirq.c:921 [inline]
 run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913
 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>