BUG: please report to dccp@vger.kernel.org => prev = 5, last = 5 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 0 PID: 5091 Comm: syz-executor.4 Not tainted 6.7.0-syzkaller-12272-g2121c43f88f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106
 tfrc_rx_hist_sample_rtt+0x3dd/0x4a0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x443/0xf50 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+0x169/0x1b0 net/dccp/ipv4.c:675
 sk_backlog_rcv include/net/sock.h:1092 [inline]
 __sk_receive_skb+0x2af/0x840 net/core/sock.c:567
 dccp_v4_rcv+0x128a/0x1980 net/dccp/ipv4.c:898
 ip_protocol_deliver_rcu+0x9f/0x480 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2e4/0x510 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:461 [inline]
 ip_rcv_finish+0x1b8/0x2e0 net/ipv4/ip_input.c:449
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_rcv+0xaf/0xd0 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x115/0x180 net/core/dev.c:5534
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5648
 process_backlog+0x101/0x6b0 net/core/dev.c:5976
 __napi_poll.constprop.0+0xb4/0x540 net/core/dev.c:6576
 napi_poll net/core/dev.c:6645 [inline]
 net_rx_action+0x956/0xe90 net/core/dev.c:6778
 __do_softirq+0x21a/0x8de kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:finish_task_switch.isra.0+0x223/0xca0 kernel/sched/core.c:5274
Code: 0a 00 00 44 8b 0d d5 81 df 0d 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 cc f8 ff ff e8 e7 b9 33 00 fb 65 48 8b 1c 25 80 c2 03 00 <48> 8d bb d8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90004d9fa48 EFLAGS: 00000202
RAX: 0000000001120201 RBX: ffff8880298dbb80 RCX: 1ffffffff1e74c89
RDX: 0000000000000000 RSI: ffffffff8accae80 RDI: ffffffff8b2f9d00
RBP: ffffc90004d9fa90 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f3a96d7 R11: 0000000000000000 R12: ffff8880b983da38
R13: ffff888028ff8000 R14: 0000000000000000 R15: ffff8880b983ccc0
 context_switch kernel/sched/core.c:5403 [inline]
 __schedule+0xf1a/0x5c00 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6817
 do_nanosleep+0x218/0x500 kernel/time/hrtimer.c:2047
 hrtimer_nanosleep+0x1ae/0x440 kernel/time/hrtimer.c:2100
 common_nsleep+0xa1/0xc0 kernel/time/posix-timers.c:1350
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1373 [inline]
 __x64_sys_clock_nanosleep+0x344/0x490 kernel/time/posix-timers.c:1373
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f92016a81b5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007fff3aabaa80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000ffc RCX: 00007f92016a81b5
RDX: 00007fff3aabaac0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff3aabab4c R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000000c7b76 R14: 00000000000c7b13 R15: 000000000000000e
 </TASK>
ccid3_first_li: No RTT estimate available, using fallback RTT
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	44 8b 0d d5 81 df 0d 	mov    0xddf81d5(%rip),%r9d        # 0xddf81de
   9:	45 85 c9             	test   %r9d,%r9d
   c:	0f 85 c0 01 00 00    	jne    0x1d2
  12:	48 89 df             	mov    %rbx,%rdi
  15:	e8 cc f8 ff ff       	call   0xfffff8e6
  1a:	e8 e7 b9 33 00       	call   0x33ba06
  1f:	fb                   	sti
  20:	65 48 8b 1c 25 80 c2 	mov    %gs:0x3c280,%rbx
  27:	03 00
* 29:	48 8d bb d8 15 00 00 	lea    0x15d8(%rbx),%rdi <-- trapping instruction
  30:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  37:	fc ff df
  3a:	48 89 fa             	mov    %rdi,%rdx
  3d:	48                   	rex.W
  3e:	c1                   	.byte 0xc1