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: 11980 Comm: syz-executor.4 Not tainted 6.4.0-syzkaller-11989-g6843306689af #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106
 ccid3_first_li+0x3b5/0x570 net/dccp/ccids/ccid3.c:691
 tfrc_lh_interval_add+0x63a/0x910 net/dccp/ccids/lib/loss_interval.c:157
 tfrc_rx_handle_loss+0xa41/0x2120 net/dccp/ccids/lib/packet_history.c:328
 ccid3_hc_rx_packet_recv+0x3ad/0xf90 net/dccp/ccids/ccid3.c:744
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xe1/0x260 net/dccp/input.c:176
 dccp_rcv_established net/dccp/input.c:374 [inline]
 dccp_rcv_established+0x10b/0x160 net/dccp/input.c:364
 dccp_v4_do_rcv+0x168/0x1a0 net/dccp/ipv4.c:676
 sk_backlog_rcv include/net/sock.h:1115 [inline]
 __sk_receive_skb+0x298/0xb60 net/core/sock.c:569
 dccp_v4_rcv+0xf79/0x1550 net/dccp/ipv4.c:899
 ip_protocol_deliver_rcu+0x9f/0x480 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2ec/0x520 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:303 [inline]
 NF_HOOK include/linux/netfilter.h:297 [inline]
 ip_local_deliver+0x1ae/0x200 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:468 [inline]
 ip_rcv_finish+0x1cf/0x2f0 net/ipv4/ip_input.c:449
 NF_HOOK include/linux/netfilter.h:303 [inline]
 NF_HOOK include/linux/netfilter.h:297 [inline]
 ip_rcv+0xae/0xd0 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5452
 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5566
 process_backlog+0x101/0x670 net/core/dev.c:5894
 __napi_poll+0xb7/0x6f0 net/core/dev.c:6460
 napi_poll net/core/dev.c:6527 [inline]
 net_rx_action+0x8a9/0xcb0 net/core/dev.c:6660
 __do_softirq+0x1d4/0x905 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x1f5/0x520 kernel/locking/lockdep.c:5729
Code: 3f 9c 7e 83 f8 01 0f 85 b9 02 00 00 9c 58 f6 c4 02 0f 85 a4 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900064874c0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000c90e9a RCX: ffffffff91752530
RDX: 1ffff110044f6c80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff230d1d2
R10: ffffffff91868e97 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8cb28b20 R15: 0000000000000000
 fs_reclaim_acquire mm/page_alloc.c:3619 [inline]
 fs_reclaim_acquire+0xda/0x160 mm/page_alloc.c:3610
 might_alloc include/linux/sched/mm.h:303 [inline]
 slab_pre_alloc_hook mm/slab.h:709 [inline]
 slab_alloc_node mm/slub.c:3452 [inline]
 kmem_cache_alloc_node+0x4b/0x3e0 mm/slub.c:3515
 __alloc_skb+0x288/0x330 net/core/skbuff.c:634
 alloc_skb include/linux/skbuff.h:1289 [inline]
 alloc_skb_with_frags+0x9a/0x6f0 net/core/skbuff.c:6228
 sock_alloc_send_pskb+0x7a7/0x930 net/core/sock.c:2782
 sock_alloc_send_skb include/net/sock.h:1871 [inline]
 dccp_sendmsg+0x2b4/0xbf0 net/dccp/proto.c:760
 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:830
 sock_sendmsg_nosec net/socket.c:725 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:748
 ____sys_sendmsg+0x34a/0x920 net/socket.c:2494
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2548
 __sys_sendmmsg+0x18f/0x460 net/socket.c:2634
 __do_sys_sendmmsg net/socket.c:2663 [inline]
 __se_sys_sendmmsg net/socket.c:2660 [inline]
 __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2660
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fec2fa8c389
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fec307cf168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fec2fbabf80 RCX: 00007fec2fa8c389
RDX: 00000000ffffff1f RSI: 0000000020004e80 RDI: 0000000000000004
RBP: 00007fec2fad7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff991598f R14: 00007fec307cf300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	9c                   	pushfq
   1:	7e 83                	jle    0xffffff86
   3:	f8                   	clc
   4:	01 0f                	add    %ecx,(%rdi)
   6:	85 b9 02 00 00 9c    	test   %edi,-0x63fffffe(%rcx)
   c:	58                   	pop    %rax
   d:	f6 c4 02             	test   $0x2,%ah
  10:	0f 85 a4 02 00 00    	jne    0x2ba
  16:	48 83 7c 24 08 00    	cmpq   $0x0,0x8(%rsp)
  1c:	74 01                	je     0x1f
  1e:	fb                   	sti
  1f:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  26:	fc ff df
* 29:	48 01 c3             	add    %rax,%rbx <-- trapping instruction
  2c:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  33:	48 c7 43 08 00 00 00 	movq   $0x0,0x8(%rbx)
  3a:	00
  3b:	48                   	rex.W
  3c:	8b                   	.byte 0x8b
  3d:	84                   	.byte 0x84
  3e:	24                   	.byte 0x24