BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 0 PID: 5074 Comm: syz-executor238 Not tainted 6.2.0-rc2-syzkaller-00203-g1f5abbd77e2c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 tfrc_rx_hist_sample_rtt+0x4d2/0x4e0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x607/0xf50 net/dccp/ccids/ccid3.c:760
 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:674
 sk_backlog_rcv include/net/sock.h:1113 [inline]
 __sk_receive_skb+0x298/0x820 net/core/sock.c:565
 dccp_v4_rcv+0xf4f/0x1520 net/dccp/ipv4.c:897
 ip_protocol_deliver_rcu+0x9f/0x460 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2ec/0x4c0 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 ip_local_deliver+0x1ae/0x200 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:454 [inline]
 ip_rcv_finish+0x1cf/0x2f0 net/ipv4/ip_input.c:449
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 ip_rcv+0xae/0xd0 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5482
 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5596
 process_backlog+0x3e4/0x810 net/core/dev.c:5924
 __napi_poll+0xb8/0x770 net/core/dev.c:6485
 napi_poll net/core/dev.c:6552 [inline]
 net_rx_action+0xa00/0xde0 net/core/dev.c:6663
 __do_softirq+0x1fb/0xadc kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x227/0x630 kernel/locking/lockdep.c:5636
Code: 6f 9f 7e 83 f8 01 0f 85 3a 03 00 00 9c 58 f6 c4 02 0f 85 25 03 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:ffffc9000349f7a0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000693ef7 RCX: ffffffff8162c37e
RDX: 1ffff1100f5aed4e RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff9132db87
R10: fffffbfff2265b70 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88801785f630 R15: 0000000000000000
 lock_sock_nested+0x3a/0xf0 net/core/sock.c:3470
 lock_sock include/net/sock.h:1725 [inline]
 dccp_sendmsg+0x1b3/0xd30 net/dccp/proto.c:742
 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:827
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x334/0x8c0 net/socket.c:2476
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2530
 __sys_sendmmsg+0x18f/0x460 net/socket.c:2616
 __do_sys_sendmmsg net/socket.c:2645 [inline]
 __se_sys_sendmmsg net/socket.c:2642 [inline]
 __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2642
 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: 0033:0x7f6db0417db9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe7bd32bc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6db0417db9
RDX: 000000000000ffc3 RSI: 0000000020001e80 RDI: 0000000000000006
RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe7bd32be0
R13: 00000000000f4240 R14: 000000000000f2db R15: 00007ffe7bd32bd4
 </TASK>
Negotiation of local Allow Short Seqnos failed in state CHANGING at net/dccp/feat.c:1534/dccp_feat_activate_values()
----------------
Code disassembly (best guess):
   0:	6f                   	outsl  %ds:(%rsi),(%dx)
   1:	9f                   	lahf
   2:	7e 83                	jle    0xffffff87
   4:	f8                   	clc
   5:	01 0f                	add    %ecx,(%rdi)
   7:	85 3a                	test   %edi,(%rdx)
   9:	03 00                	add    (%rax),%eax
   b:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  12:	85 25 03 00 00 48    	test   %esp,0x48000003(%rip)        # 0x4800001b
  18:	83 7c 24 08 00       	cmpl   $0x0,0x8(%rsp)
  1d:	74 01                	je     0x20
  1f:	fb                   	sti
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	48 01 c3             	add    %rax,%rbx <-- trapping instruction
  2d:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  34:	48 c7 43 08 00 00 00 	movq   $0x0,0x8(%rbx)
  3b:	00
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	84                   	.byte 0x84
  3f:	24                   	.byte 0x24