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: 16722 Comm: syz-executor.4 Not tainted 6.5.0-syzkaller-11329-g708283abf896 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106
 tfrc_rx_hist_sample_rtt+0x3db/0x4a0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x844/0xf10 net/dccp/ccids/ccid3.c:760
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xe3/0x260 net/dccp/input.c:176
 dccp_rcv_established net/dccp/input.c:374 [inline]
 dccp_rcv_established+0x106/0x160 net/dccp/input.c:364
 dccp_v4_do_rcv+0x169/0x1a0 net/dccp/ipv4.c:680
 sk_backlog_rcv include/net/sock.h:1115 [inline]
 __release_sock+0x132/0x3a0 net/core/sock.c:2982
 release_sock+0x58/0x1b0 net/core/sock.c:3519
 dccp_sendmsg+0x40f/0xcc0 net/dccp/proto.c:803
 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:840
 sock_sendmsg_nosec net/socket.c:730 [inline]
 sock_sendmsg+0xd9/0x180 net/socket.c:753
 ____sys_sendmsg+0x2ac/0x940 net/socket.c:2540
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2594
 __sys_sendmmsg+0x1a1/0x450 net/socket.c:2680
 __do_sys_sendmmsg net/socket.c:2709 [inline]
 __se_sys_sendmmsg net/socket.c:2706 [inline]
 __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2706
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f68b8c7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f68b9a900c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f68b8d9bf80 RCX: 00007f68b8c7cae9
RDX: 0000000000000002 RSI: 0000000020006c00 RDI: 0000000000000004
RBP: 00007f68b8cc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f68b8d9bf80 R15: 00007f68b8ebfa48
 </TASK>