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: 12122 Comm: syz-executor.5 Not tainted 6.5.0-syzkaller-03967-gbd6c11bc43c4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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+0x3db/0x4a0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x844/0xf10 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+0x169/0x1a0 net/dccp/ipv4.c:680
 sk_backlog_rcv include/net/sock.h:1115 [inline]
 __sk_receive_skb+0x2a8/0xba0 net/core/sock.c:571
 dccp_v4_rcv+0x1282/0x1a00 net/dccp/ipv4.c:903
 ip_protocol_deliver_rcu+0x9f/0x480 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2e6/0x520 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:304 [inline]
 NF_HOOK include/linux/netfilter.h:298 [inline]
 ip_local_deliver+0x1be/0x540 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:468 [inline]
 ip_rcv_finish+0x1c4/0x2e0 net/ipv4/ip_input.c:449
 NF_HOOK include/linux/netfilter.h:304 [inline]
 NF_HOOK include/linux/netfilter.h:298 [inline]
 ip_rcv+0xc8/0x410 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x115/0x180 net/core/dev.c:5523
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5637
 process_backlog+0x101/0x6c0 net/core/dev.c:5965
 __napi_poll.constprop.0+0xb4/0x530 net/core/dev.c:6527
 napi_poll net/core/dev.c:6594 [inline]
 net_rx_action+0x956/0xe90 net/core/dev.c:6727
 __do_softirq+0x218/0x965 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+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:_compound_head+0x0/0x130 include/linux/page-flags.h:244
Code: 48 c1 e5 0c 80 3c 02 00 75 08 48 89 2b 31 c0 5b 5d c3 48 89 df e8 b0 02 16 00 eb ee 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 <41> 54 55 53 48 89 fb e8 14 c2 c0 ff 48 8d 7b 08 48 b8 00 00 00 00
RSP: 0018:ffffc9000ae3f6d8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 00fff1800000004a RCX: 0000000000000000
RDX: ffff888022910000 RSI: ffffffff81c65dc7 RDI: ffffea0001de7ec0
RBP: 0000000000000000 R08: 0000000000000007 R09: ffffffffffffffff
R10: 00fff1800000004a R11: 00000000000051c4 R12: 00007fd962c60000
R13: ffff8880761002f8 R14: dffffc0000000000 R15: ffffea0001de7ec0
 PageSwapBacked include/linux/page-flags.h:493 [inline]
 mm_counter_file include/linux/mm.h:2552 [inline]
 mm_counter include/linux/mm.h:2561 [inline]
 zap_pte_range mm/memory.c:1451 [inline]
 zap_pmd_range mm/memory.c:1570 [inline]
 zap_pud_range mm/memory.c:1599 [inline]
 zap_p4d_range mm/memory.c:1620 [inline]
 unmap_page_range+0x118f/0x32e0 mm/memory.c:1641
 unmap_single_vma+0x194/0x2b0 mm/memory.c:1687
 unmap_vmas+0x267/0x3c0 mm/memory.c:1726
 exit_mmap+0x1a7/0x960 mm/mmap.c:3203
 __mmput+0x12a/0x4d0 kernel/fork.c:1356
 mmput+0x62/0x70 kernel/fork.c:1378
 exit_mm kernel/exit.c:567 [inline]
 do_exit+0x9b4/0x2a20 kernel/exit.c:861
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024
 get_signal+0x23ea/0x2770 kernel/signal.c:2881
 arch_do_signal_or_restart+0x89/0x5f0 arch/x86/kernel/signal.c:308
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd96327cae9
Code: Unable to access opcode bytes at 0x7fd96327cabf.
RSP: 002b:00007fd963f6d178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fd96339bf88 RCX: 00007fd96327cae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd96339bf88
RBP: 00007fd96339bf80 R08: 00007fd963f6d6c0 R09: 00007fd963f6d6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd96339bf8c
R13: 000000000000000b R14: 00007ffc1b429ed0 R15: 00007ffc1b429fb8
 </TASK>
----------------
Code disassembly (best guess):
   0:	48 c1 e5 0c          	shl    $0xc,%rbp
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	75 08                	jne    0x12
   a:	48 89 2b             	mov    %rbp,(%rbx)
   d:	31 c0                	xor    %eax,%eax
   f:	5b                   	pop    %rbx
  10:	5d                   	pop    %rbp
  11:	c3                   	ret
  12:	48 89 df             	mov    %rbx,%rdi
  15:	e8 b0 02 16 00       	call   0x1602ca
  1a:	eb ee                	jmp    0xa
  1c:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  23:	00 00 00 00
  27:	0f 1f 00             	nopl   (%rax)
* 2a:	41 54                	push   %r12 <-- trapping instruction
  2c:	55                   	push   %rbp
  2d:	53                   	push   %rbx
  2e:	48 89 fb             	mov    %rdi,%rbx
  31:	e8 14 c2 c0 ff       	call   0xffc0c24a
  36:	48 8d 7b 08          	lea    0x8(%rbx),%rdi
  3a:	48                   	rex.W
  3b:	b8 00 00 00 00       	mov    $0x0,%eax