BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:409/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 18863 Comm: syz-executor.0 Not tainted 5.2.0-rc6+ #52
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 tfrc_rx_hist_sample_rtt.cold+0x56/0x61 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x5c6/0xeb0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xeb/0x270 net/dccp/input.c:176
 dccp_rcv_established net/dccp/input.c:374 [inline]
 dccp_rcv_established+0x83/0xb0 net/dccp/input.c:364
 dccp_v4_do_rcv+0x139/0x190 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:945 [inline]
 __release_sock+0x129/0x390 net/core/sock.c:2418
 release_sock+0x59/0x1c0 net/core/sock.c:2934
 dccp_sendmsg+0x683/0xd00 net/dccp/proto.c:814
 inet_sendmsg+0x141/0x5d0 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:665
 ___sys_sendmsg+0x3e2/0x920 net/socket.c:2286
 __sys_sendmmsg+0x1bf/0x4d0 net/socket.c:2381
 __do_sys_sendmmsg net/socket.c:2410 [inline]
 __se_sys_sendmmsg net/socket.c:2407 [inline]
 __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2407
 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4597c9
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f505a751c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004597c9
RDX: 00000000000003a6 RSI: 0000000020005700 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f505a7526d4
R13: 00000000004c6df8 R14: 00000000004dc140 R15: 00000000ffffffff