ci2 starts bisection 2023-06-20 21:35:39.685942104 +0000 UTC m=+3123.914900357
bisecting fixing commit since 9d6bde853685609a631871d7c12be94fdf8d912e
building syzkaller on 4bce1a3e705a8b62de8194bdb28f5eef89c8feec
ensuring issue is reproducible on original commit 9d6bde853685609a631871d7c12be94fdf8d912e

testing commit 9d6bde853685609a631871d7c12be94fdf8d912e gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: e5103f778a1232cba0f5b4fe5daf82f641016dae735b65b1ced95c5ca93c1a77
all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx
testing current HEAD 471e639e59d128f4bf58000a118b2ceca3893f98
testing commit 471e639e59d128f4bf58000a118b2ceca3893f98 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 34c6f061a43a184998bf5a9a52ae40377cebbf655a12b2afe77a05e87b7c3fa4
all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx
crash still not fixed/happens on the oldest tested release
revisions tested: 2, total time: 29m15.211875231s (build: 21m44.935937822s, test: 6m55.679955179s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Linux 5.15.117
crash: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx
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: 4204 Comm: syz-executor.5 Not tainted 5.15.117-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
 tfrc_rx_hist_sample_rtt+0x3fe/0x410 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x1bc/0xe90 net/dccp/ccids/ccid3.c:760
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xb8/0x210 net/dccp/input.c:176
 dccp_rcv_established net/dccp/input.c:374 [inline]
 dccp_rcv_established+0xa8/0xf0 net/dccp/input.c:364
 dccp_v4_do_rcv+0xec/0x150 net/dccp/ipv4.c:669
 sk_backlog_rcv include/net/sock.h:1059 [inline]
 __sk_receive_skb+0x210/0x680 net/core/sock.c:528
 ip_protocol_deliver_rcu+0x7b/0x600 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1db/0x2f0 net/ipv4/ip_input.c:231
 __netif_receive_skb_one_core+0x104/0x180 net/core/dev.c:5462
 process_backlog+0x102/0x630 net/core/dev.c:6453
 __napi_poll+0x96/0x480 net/core/dev.c:7012
 napi_poll net/core/dev.c:7079 [inline]
 net_rx_action+0x6fc/0xa50 net/core/dev.c:7166
 __do_softirq+0x1d3/0x90e kernel/softirq.c:558
 do_softirq.part.0+0xde/0x130 kernel/softirq.c:459
 </IRQ>
 <TASK>
 do_softirq kernel/softirq.c:451 [inline]
 __local_bh_enable_ip+0x102/0x120 kernel/softirq.c:383
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:766 [inline]
 ip_finish_output2+0x640/0x1ea0 net/ipv4/ip_output.c:229
 dst_output include/net/dst.h:449 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0x784/0x1e40 net/ipv4/ip_output.c:532
 dccp_transmit_skb+0x803/0xf80 net/dccp/output.c:138
 dccp_xmit_packet+0x20d/0x660 net/dccp/output.c:281
 dccp_write_xmit+0x10e/0x180 net/dccp/output.c:366
 dccp_sendmsg+0x780/0xa30 net/dccp/proto.c:800
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg+0xab/0xe0 net/socket.c:724
 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2412
 ___sys_sendmsg+0xd3/0x150 net/socket.c:2466
 __sys_sendmsg+0xb2/0x140 net/socket.c:2495
 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+0x61/0xcb
RIP: 0033:0x7fd659a89169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007fd658dfb168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd659ba8f80 RCX: 00007fd659a89169
RDX: 000000000c004004 RSI: 0000000020004340 RDI: 0000000000000005
RBP: 00007fd659ae4ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcde5404cf R14: 00007fd658dfb300 R15: 0000000000022000
 </TASK>