BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:422/tfrc_rx_hist_sample_rtt()
CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.0.0-rc7+ #98
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:422
 ccid3_hc_rx_packet_recv+0x5c6/0xeb0 net/dccp/ccids/ccid3.c:767
 ccid_hc_rx_packet_recv net/dccp/ccid.h:185 [inline]
 dccp_deliver_input_to_ccids+0xee/0x280 net/dccp/input.c:180
 dccp_rcv_established net/dccp/input.c:378 [inline]
 dccp_rcv_established+0x83/0xb0 net/dccp/input.c:368
 dccp_v4_do_rcv+0x139/0x190 net/dccp/ipv4.c:659
 sk_backlog_rcv include/net/sock.h:936 [inline]
 __sk_receive_skb+0x341/0xbf0 net/core/sock.c:473
 dccp_v4_rcv+0xeaa/0x1bf1 net/dccp/ipv4.c:880
 ip_protocol_deliver_rcu+0x60/0x8f0 net/ipv4/ip_input.c:208
 ip_local_deliver_finish+0x23b/0x390 net/ipv4/ip_input.c:234
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 ip_local_deliver+0x1e9/0x520 net/ipv4/ip_input.c:255
 dst_input include/net/dst.h:450 [inline]
 ip_rcv_finish+0x1db/0x2f0 net/ipv4/ip_input.c:414
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 ip_rcv+0xe8/0x3f0 net/ipv4/ip_input.c:524
 __netif_receive_skb_one_core+0x115/0x1a0 net/core/dev.c:4973
 __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083
 process_backlog+0x206/0x750 net/core/dev.c:5923
 napi_poll net/core/dev.c:6346 [inline]
 net_rx_action+0x4fa/0x1070 net/core/dev.c:6412
 __do_softirq+0x266/0x95a kernel/softirq.c:292
 run_ksoftirqd kernel/softirq.c:654 [inline]
 run_ksoftirqd+0x8e/0x110 kernel/softirq.c:646
 smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
dccp_close: ABORT with 752 bytes unread
dccp_close: ABORT with 376 bytes unread
netlink: 'syz-executor.3': attribute type 1 has an invalid length.
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'.
RDS: rds_bind could not find a transport for 300::ffff:ac14:14bb, load rds_tcp or rds_rdma?
RDS: rds_bind could not find a transport for 300::ffff:ac14:14bb, load rds_tcp or rds_rdma?
Started in network mode
Own node identity fe8000000000000000000000000000bb, cluster identity 4711
Enabling of bearer <udp:syz2> rejected, failed to enable media
device bond_slave_1 entered promiscuous mode
device veth0_to_bridge entered promiscuous mode
device veth0_to_bridge left promiscuous mode
device bond_slave_1 left promiscuous mode
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.