======================================
| [   20.013231][  T282] ip_local_port_range: prefer different parity for start/end values.
| [   22.529107][  T293] ------------[ cut here ]------------
| [ 22.529604][ T293] WARNING: CPU: 2 PID: 293 at ./include/linux/skbuff.h:1164 ip_route_me_harder (./include/linux/skbuff.h:1164 ./include/linux/skbuff.h:1178 net/ipv4/netfilter.c:68) 
| [   22.530441][  T293] Modules linked in: nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables veth
[   22.531838][  T293] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.532243][ T293] RIP: 0010:ip_route_me_harder (./include/linux/skbuff.h:1164 ./include/linux/skbuff.h:1178 net/ipv4/netfilter.c:68) 
[ 22.532669][ T293] Code: 31 db e9 9a f7 ff ff 80 3c 02 00 0f 85 ee 05 00 00 49 8b 46 58 48 89 c3 48 83 e3 fe a8 01 0f 85 f5 02 00 00 48 85 db 74 04 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c
All code
========
   0:	31 db                	xor    %ebx,%ebx
   2:	e9 9a f7 ff ff       	jmp    0xfffffffffffff7a1
   7:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   b:	0f 85 ee 05 00 00    	jne    0x5ff
  11:	49 8b 46 58          	mov    0x58(%r14),%rax
  15:	48 89 c3             	mov    %rax,%rbx
  18:	48 83 e3 fe          	and    $0xfffffffffffffffe,%rbx
  1c:	a8 01                	test   $0x1,%al
  1e:	0f 85 f5 02 00 00    	jne    0x319
  24:	48 85 db             	test   %rbx,%rbx
  27:	74 04                	je     0x2d
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  34:	fc ff df 
  37:	4c 89 ea             	mov    %r13,%rdx
  3a:	48 c1 ea 03          	shr    $0x3,%rdx
  3e:	80                   	.byte 0x80
  3f:	3c                   	.byte 0x3c

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   a:	fc ff df 
   d:	4c 89 ea             	mov    %r13,%rdx
  10:	48 c1 ea 03          	shr    $0x3,%rdx
  14:	80                   	.byte 0x80
  15:	3c                   	.byte 0x3c
[   22.533808][  T293] RSP: 0018:ffffc900005cf738 EFLAGS: 00010286
[   22.534235][  T293] RAX: ffff888009e407c0 RBX: ffff888009e407c0 RCX: 1ffff110013c80f8
[   22.534720][  T293] RDX: 1ffff110011d0138 RSI: 0000000000000000 RDI: ffff888004cf10e0
[   22.535200][  T293] RBP: ffff88800cae1bc0 R08: 1ffff920000b9ef9 R09: 0000000000000000
[   22.535691][  T293] R10: ffffe8ffffd03aef R11: dffffc0000000000 R12: ffff88800c1b2740
[   22.536168][  T293] R13: ffff888008e809c0 R14: ffff888008e80968 R15: ffff888008e809e9
[   22.536653][  T293] FS:  00007ff1ec3cc740(0000) GS:ffff88807bba4000(0000) knlGS:0000000000000000
[   22.537208][  T293] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   22.537607][  T293] CR2: 00007ff1ec549730 CR3: 000000000f7e9003 CR4: 0000000000772ef0
[   22.538414][  T293] PKRU: 55555554
[   22.538674][  T293] Call Trace:
[   22.538923][  T293]  <TASK>
[ 22.539101][ T293] ? __pfx_ip_route_me_harder (net/ipv4/netfilter.c:22) 
[ 22.539436][ T293] ? nf_nat_manip_pkt (net/netfilter/nf_nat_proto.c:388) nf_nat 
[ 22.539848][ T293] ? __pfx_nf_nat_manip_pkt (net/netfilter/nf_nat_proto.c:379) nf_nat 
[ 22.540311][ T293] nf_nat_ipv4_local_fn (net/netfilter/nf_nat_proto.c:768 net/netfilter/nf_nat_proto.c:749) nf_nat 
[ 22.540733][ T293] ? ipv4_conntrack_defrag (./arch/x86/include/asm/bitops.h:206 (discriminator 3) ./arch/x86/include/asm/bitops.h:238 (discriminator 3) ./include/asm-generic/bitops/instrumented-non-atomic.h:142 (discriminator 3) net/ipv4/netfilter/nf_defrag_ipv4.c:69 (discriminator 3)) nf_defrag_ipv4 
[ 22.541132][ T293] ? __pfx_nf_nat_ipv4_local_fn (net/netfilter/nf_nat_proto.c:751) nf_nat 
[ 22.541528][ T293] nf_hook_slow (./include/linux/netfilter.h:157 net/netfilter/core.c:623) 
[ 22.541865][ T293] __ip_local_out (./include/linux/netfilter.h:272 net/ipv4/ip_output.c:118) 
[ 22.542188][ T293] ? __pfx___ip_local_out (net/ipv4/ip_output.c:101) 
[ 22.542510][ T293] ? __pfx_dst_output (./include/net/dst.h:460) 
[ 22.542845][ T293] __ip_queue_xmit (net/ipv4/ip_output.c:127 (discriminator 4) net/ipv4/ip_output.c:527 (discriminator 4)) 
[ 22.543174][ T293] ? __skb_clone (./arch/x86/include/asm/atomic.h:53 (discriminator 4) ./include/linux/atomic/atomic-arch-fallback.h:992 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:436 (discriminator 4) net/core/skbuff.c:1566 (discriminator 4)) 
[ 22.543500][ T293] __tcp_transmit_skb (net/ipv4/tcp_output.c:1625 (discriminator 4)) 
[ 22.543841][ T293] ? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1446) 
[ 22.544175][ T293] tcp_connect (net/ipv4/tcp_output.c:1643 net/ipv4/tcp_output.c:4319) 
[ 22.544506][ T293] tcp_v4_connect (net/ipv4/tcp_ipv4.c:346) 
[ 22.544843][ T293] ? __pfx_tcp_v4_connect (net/ipv4/tcp_ipv4.c:224) 
[ 22.545163][ T293] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 22.545492][ T293] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 22.545830][ T293] __inet_stream_connect (net/ipv4/af_inet.c:677) 
[ 22.546151][ T293] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:412) 
[ 22.546477][ T293] ? __pfx_inet_stream_connect (net/ipv4/af_inet.c:744) 
[ 22.546806][ T293] inet_stream_connect (net/ipv4/af_inet.c:749) 
[ 22.547131][ T293] __sys_connect (net/socket.c:2086 net/socket.c:2105) 
[ 22.547454][ T293] ? __pfx___sys_connect (net/socket.c:2093) 
[ 22.547788][ T293] ? do_fcntl (fs/fcntl.c:478) 
[ 22.548040][ T293] ? __pfx_do_fcntl (fs/fcntl.c:448) 
[ 22.548362][ T293] ? fd_install (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcupdate.h:955 fs/file.c:661) 
[ 22.548709][ T293] ? __sys_socket (net/socket.c:503 net/socket.c:1740) 
[ 22.549028][ T293] ? __pfx___sys_socket (net/socket.c:1727) 
[ 22.549357][ T293] __x64_sys_connect (net/socket.c:2108) 
[ 22.549682][ T293] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 22.550008][ T293] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 22.550383][ T293] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   22.550790][  T293] RIP: 0033:0x7ff1ec52ad77
[ 22.551123][ T293] Code: 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 18 89 54 24 0c 48 89 34 24 89
All code
========
   0:	64 89 01             	mov    %eax,%fs:(%rcx)
   3:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
   7:	c3                   	ret
   8:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   f:	00 00 00 
  12:	90                   	nop
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2a 00 00 00       	mov    $0x2a,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 18          	sub    $0x18,%rsp
  37:	89 54 24 0c          	mov    %edx,0xc(%rsp)
  3b:	48 89 34 24          	mov    %rsi,(%rsp)
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 18          	sub    $0x18,%rsp
   d:	89 54 24 0c          	mov    %edx,0xc(%rsp)
  11:	48 89 34 24          	mov    %rsi,(%rsp)
  15:	89                   	.byte 0x89
[   22.552250][  T293] RSP: 002b:00007ffc6ff5ffb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
[   22.552747][  T293] RAX: ffffffffffffffda RBX: 000055be189cccf0 RCX: 00007ff1ec52ad77
[   22.553228][  T293] RDX: 0000000000000010 RSI: 00007ffc6ff60930 RDI: 0000000000000007
[   22.553716][  T293] RBP: 00007ffc6ff60930 R08: 00007ffc6ff5ffc0 R09: 0000000000000010
[   22.554192][  T293] R10: 00000000000001bb R11: 0000000000000246 R12: 0000000000000010


Finger prints:
ip_route_me_harder:nf_nat_ipv4_local_fn:nf_hook_slow:__ip_local_out:__ip_queue_xmit