ccid3_first_li: No RTT estimate available, using fallback RTT
ccid3_first_li: X_recv==0
BUG: stored value of X_recv is zero at net/dccp/ccids/ccid3.c:691/ccid3_first_li()
CPU: 1 PID: 7712 Comm: kworker/1:13 Not tainted 6.0.0-rc6-syzkaller-17715-g5aa266bb455b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: events nsim_dev_trap_report_work
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156
 show_stack+0x2c/0x54 arch/arm64/kernel/stacktrace.c:163
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 ccid3_first_li+0x274/0x280 net/dccp/ccids/ccid3.c:691
 tfrc_lh_interval_add+0x280/0x444 net/dccp/ccids/lib/loss_interval.c:157
 tfrc_rx_handle_loss+0x23c/0x920 net/dccp/ccids/lib/packet_history.c:328
 ccid3_hc_rx_packet_recv+0x17c/0x4b8 net/dccp/ccids/ccid3.c:744
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids net/dccp/input.c:176 [inline]
 dccp_rcv_established+0x120/0x1a4 net/dccp/input.c:374
 dccp_v4_do_rcv+0x58/0xd0 net/dccp/ipv4.c:666
 sk_backlog_rcv include/net/sock.h:1100 [inline]
 __sk_receive_skb+0x2a4/0x494 net/core/sock.c:565
 dccp_v4_rcv+0x964/0xc5c net/dccp/ipv4.c:889
 ip_protocol_deliver_rcu+0x224/0x414 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x124/0x1d8 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0xd0/0xf4 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:461 [inline]
 ip_rcv_finish+0x16c/0x190 net/ipv4/ip_input.c:444
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x80/0xb0 net/ipv4/ip_input.c:564
 __netif_receive_skb_one_core net/core/dev.c:5485 [inline]
 __netif_receive_skb+0x70/0x14c net/core/dev.c:5599
 process_backlog+0x23c/0x384 net/core/dev.c:5927
 __napi_poll+0x5c/0x24c net/core/dev.c:6511
 napi_poll+0x110/0x484 net/core/dev.c:6578
 net_rx_action+0x18c/0x40c net/core/dev.c:6689
 _stext+0x168/0x37c
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
 call_on_irq_stack+0x2c/0x54
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:84
 invoke_softirq+0x70/0xbc kernel/softirq.c:452
 __irq_exit_rcu+0xf0/0x140 kernel/softirq.c:650
 irq_exit_rcu+0x10/0x40 kernel/softirq.c:662
 __el1_irq arch/arm64/kernel/entry-common.c:471 [inline]
 el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:485
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:490
 el1h_64_irq+0x64/0x68
 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline]
 __local_bh_enable_ip+0x144/0x1a4 kernel/softirq.c:401
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x48/0x58 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:394 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:814 [inline]
 nsim_dev_trap_report_work+0x2c8/0x370 drivers/net/netdevsim/dev.c:844
 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
 worker_thread+0x340/0x610 kernel/workqueue.c:2436
 kthread+0x12c/0x158 kernel/kthread.c:376
 ret_from_fork+0x10/0x20