BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt()
CPU: 0 UID: 0 PID: 5353 Comm: syz-executor162 Not tainted 6.15.0-rc2-syzkaller-00042-g1a1d569a75f3 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 tfrc_rx_hist_sample_rtt+0x399/0x4b0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x6be/0xe90 net/dccp/ccids/ccid3.c:760
 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+0x1bb/0x320 net/dccp/input.c:374
 dccp_v4_do_rcv+0xff/0x1f0 net/dccp/ipv4.c:678
 sk_backlog_rcv include/net/sock.h:1132 [inline]
 __sk_receive_skb+0x82b/0x8b0 net/core/sock.c:575
 ip_protocol_deliver_rcu+0x2e9/0x450 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x343/0x600 net/ipv4/ip_input.c:233
 NF_HOOK+0x3a0/0x450 include/linux/netfilter.h:314
 NF_HOOK+0x3a0/0x450 include/linux/netfilter.h:314
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x2c9/0x670 net/core/dev.c:5998
 process_backlog+0x664/0x15c0 net/core/dev.c:6350
 __napi_poll+0xcb/0x480 net/core/dev.c:7322
 napi_poll net/core/dev.c:7386 [inline]
 net_rx_action+0x89d/0x1240 net/core/dev.c:7508
 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579
 do_softirq+0x11f/0x1e0 kernel/softirq.c:480
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1be/0x200 kernel/softirq.c:407
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:910 [inline]
 __dev_queue_xmit+0x1780/0x3f60 net/core/dev.c:4654
 dev_queue_xmit include/linux/netdevice.h:3350 [inline]
 neigh_hh_output include/net/neighbour.h:523 [inline]
 neigh_output include/net/neighbour.h:537 [inline]
 ip_finish_output2+0xcd2/0x12e0 net/ipv4/ip_output.c:235
 ip_local_out net/ipv4/ip_output.c:129 [inline]
 __ip_queue_xmit+0x1042/0x1960 net/ipv4/ip_output.c:527
 dccp_transmit_skb+0xf49/0x16e0 net/dccp/output.c:138
 dccp_xmit_packet+0x35a/0x600 net/dccp/output.c:281
 dccp_write_xmit+0x138/0x220 net/dccp/output.c:366
 dccp_sendmsg+0x76b/0xbb0 net/dccp/proto.c:801
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x1a6/0x270 net/socket.c:727
 ____sys_sendmsg+0x523/0x860 net/socket.c:2566
 ___sys_sendmsg net/socket.c:2620 [inline]
 __sys_sendmmsg+0x3a0/0x7b0 net/socket.c:2709
 __do_sys_sendmmsg net/socket.c:2736 [inline]
 __se_sys_sendmmsg net/socket.c:2733 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2733
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33ea086a99
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 1f 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:00007ffd0b2b06e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f33ea086a99
RDX: 0000000000000004 RSI: 000020000000d4c0 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd0b2b0718
R13: 00007ffd0b2b0750 R14: 000000000000000e R15: 431bde82d7b634db
 </TASK>