------------[ cut here ]------------
WARNING: CPU: 0 PID: 15 at net/ipv4/tcp_input.c:2615 tcp_cong_control net/ipv4/tcp_input.c:3487 [inline]
WARNING: CPU: 0 PID: 15 at net/ipv4/tcp_input.c:2615 tcp_ack+0x2ce6/0x42e0 net/ipv4/tcp_input.c:3891
Modules linked in:
CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 5.18.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tcp_cwnd_reduction net/ipv4/tcp_input.c:2615 [inline]
RIP: 0010:tcp_cong_control net/ipv4/tcp_input.c:3487 [inline]
RIP: 0010:tcp_ack+0x2ce6/0x42e0 net/ipv4/tcp_input.c:3891
Code: 04 01 84 c0 0f 85 d5 15 00 00 48 8b 84 24 a0 00 00 00 80 60 01 7f 49 bc 00 00 00 00 00 fc ff df e9 f7 dc ff ff e8 2a b5 c6 f8 <0f> 0b 49 bc 00 00 00 00 00 fc ff df e9 f0 f9 ff ff e8 14 b5 c6 f8
RSP: 0018:ffffc90000147100 EFLAGS: 00010246
RAX: ffffffff88bf4216 RBX: ffff88801edfe99c RCX: ffff88813fea3a00
RDX: 0000000080000101 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001473b0 R08: ffffffff88bf366a R09: ffffffff88c1a7cb
R10: 0000000000000002 R11: ffff88813fea3a00 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000005706
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe3fd80e58 CR3: 00000000242f8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tcp_rcv_established+0x7b1/0x2270 net/ipv4/tcp_input.c:5959
 tcp_v4_do_rcv+0x476/0xa10 net/ipv4/tcp_ipv4.c:1660
 tcp_v4_rcv+0x3c76/0x4c10 net/ipv4/tcp_ipv4.c:2074
 ip_protocol_deliver_rcu+0x20d/0x3f0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish net/ipv4/ip_input.c:233 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x36a/0x5d0 net/ipv4/ip_input.c:254
 __netif_receive_skb_one_core net/core/dev.c:5405 [inline]
 __netif_receive_skb+0x1d1/0x500 net/core/dev.c:5519
 process_backlog+0x4f8/0x8b0 net/core/dev.c:5847
 __napi_poll+0xbd/0x520 net/core/dev.c:6413
 napi_poll net/core/dev.c:6480 [inline]
 net_rx_action+0x61c/0xf30 net/core/dev.c:6567
 __do_softirq+0x392/0x7a3 kernel/softirq.c:558
 run_ksoftirqd+0xc1/0x120 kernel/softirq.c:921
 smpboot_thread_fn+0x533/0x9d0 kernel/smpboot.c:164
 kthread+0x2a3/0x2d0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30
 </TASK>