BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 31064 Comm: syz-executor.1 Not tainted 6.8.0-syzkaller-05204-g237bb5f7f7f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 tfrc_rx_hist_sample_rtt+0x397/0x4b0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x69d/0xe60 net/dccp/ccids/ccid3.c:760
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids net/dccp/input.c:176 [inline]
 dccp_rcv_established+0x1bb/0x320 net/dccp/input.c:374
 dccp_v4_do_rcv+0xff/0x1f0 net/dccp/ipv4.c:675
 sk_backlog_rcv include/net/sock.h:1106 [inline]
 __sk_receive_skb+0x823/0x8a0 net/core/sock.c:569
 ip_protocol_deliver_rcu+0x2e0/0x430 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x33f/0x5f0 net/ipv4/ip_input.c:233
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 __netif_receive_skb_one_core net/core/dev.c:5538 [inline]
 __netif_receive_skb+0x2bf/0x6a0 net/core/dev.c:5652
 process_backlog+0x39d/0x7a0 net/core/dev.c:5981
 __napi_poll+0xcb/0x490 net/core/dev.c:6632
 napi_poll net/core/dev.c:6701 [inline]
 net_rx_action+0x7bb/0x1090 net/core/dev.c:6813
 __do_softirq+0x2bc/0x943 kernel/softirq.c:554
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:217 [inline]
RIP: 0010:unwind_next_frame+0x26c/0x2a00 arch/x86/kernel/unwind_orc.c:494
Code: 54 00 39 eb 0f 86 02 1e 00 00 89 e8 48 8d 1c 85 d8 d0 aa 90 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 0f b6 04 30 <84> c0 0f 85 b0 20 00 00 44 8b 3b 89 e8 ff c0 48 8d 1c 85 d8 d0 aa
RSP: 0018:ffffc9000aa9f408 EFLAGS: 00000a03
RAX: 0000000000000000 RBX: ffffffff90d15e24 RCX: 00000000000aa001
RDX: ffff888054dd5a00 RSI: 000000000009a353 RDI: 00000000000aa000
RBP: 000000000009a353 R08: ffffffff814091b4 R09: ffffc9000aa9f5d0
R10: 0000000000000003 R11: ffffffff8180dbc0 R12: ffffc9000aa9f4e0
R13: 00000000000aa001 R14: dffffc0000000000 R15: ffffffff8aa353ae
 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:589
 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2121 [inline]
 slab_free mm/slub.c:4299 [inline]
 kfree+0x14a/0x380 mm/slub.c:4409
 dccp_feat_val_destructor net/dccp/feat.c:385 [inline]
 dccp_feat_entry_destructor net/dccp/feat.c:414 [inline]
 dccp_feat_list_purge+0x148/0x1f0 net/dccp/feat.c:546
 dccp_set_state+0xfa/0x260 net/dccp/proto.c:92
 dccp_rcv_respond_partopen_state_process+0x2ba/0x500 net/dccp/input.c:557
 dccp_rcv_state_process+0x697/0x910 net/dccp/input.c:689
 dccp_v4_do_rcv+0x11a/0x1f0 net/dccp/ipv4.c:704
 sk_backlog_rcv include/net/sock.h:1106 [inline]
 __release_sock+0x243/0x350 net/core/sock.c:2984
 release_sock+0x61/0x1f0 net/core/sock.c:3550
 dccp_sendmsg+0x4de/0xb70 net/dccp/proto.c:803
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x1a6/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2199
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f3984a7dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f39858500c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f3984babf80 RCX: 00007f3984a7dda9
RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f3984aca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f3984babf80 R15: 00007ffe6e45c188
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	39 eb                	cmp    %ebp,%ebx
   2:	0f 86 02 1e 00 00    	jbe    0x1e0a
   8:	89 e8                	mov    %ebp,%eax
   a:	48 8d 1c 85 d8 d0 aa 	lea    -0x6f552f28(,%rax,4),%rbx
  11:	90
  12:	48 89 d8             	mov    %rbx,%rax
  15:	48 c1 e8 03          	shr    $0x3,%rax
  19:	49 be 00 00 00 00 00 	movabs $0xdffffc0000000000,%r14
  20:	fc ff df
  23:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax
* 28:	84 c0                	test   %al,%al <-- trapping instruction
  2a:	0f 85 b0 20 00 00    	jne    0x20e0
  30:	44 8b 3b             	mov    (%rbx),%r15d
  33:	89 e8                	mov    %ebp,%eax
  35:	ff c0                	inc    %eax
  37:	48                   	rex.W
  38:	8d                   	.byte 0x8d
  39:	1c 85                	sbb    $0x85,%al
  3b:	d8 d0                	fcom   %st(0)
  3d:	aa                   	stos   %al,%es:(%rdi)