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: 1 PID: 3670 Comm: syz-executor153 Not tainted 6.1.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 tfrc_rx_hist_sample_rtt+0x4ce/0x4e0 net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0x603/0xf50 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+0x107/0x160 net/dccp/input.c:364 dccp_v4_do_rcv+0x164/0x1a0 net/dccp/ipv4.c:687 sk_backlog_rcv include/net/sock.h:1109 [inline] __release_sock+0x12f/0x3a0 net/core/sock.c:2906 release_sock+0x54/0x1b0 net/core/sock.c:3462 dccp_sendmsg+0x6cc/0xd20 net/dccp/proto.c:785 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:827 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 ____sys_sendmsg+0x334/0x8c0 net/socket.c:2482 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536 __sys_sendmmsg+0x18b/0x460 net/socket.c:2622 __do_sys_sendmmsg net/socket.c:2651 [inline] __se_sys_sendmmsg net/socket.c:2648 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2648 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f958cdb4319 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 18 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:00007fff16b31a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 000000000000003e RCX: 00007f958cdb4319 RDX: 0000000000000002 RSI: 0000000020000580 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000003 R10: 0000000000000804 R11: 0000000000000246 R12: 00007fff16b31a5c R13: 00007fff16b31a70 R14: 00007fff16b31ab0 R15: 0000000000000000 dccp_close: ABORT with 39 bytes unread