======================================
| [   68.609668][  T611] DCCP is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list
| # DCCP IPv4 ... [   68.748958][  T610] ------------[ cut here ]------------
| [   68.749349][  T610] UBSAN: invalid-load in ./include/linux/skbuff.h:4267:9
| [   68.749716][  T610] load of value 107 is not a valid value for type '_Bool'
[   68.750521][  T610] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   68.751148][  T610] Call Trace:
[   68.751326][  T610]  <TASK>
[ 68.751485][ T610] dump_stack_lvl (lib/dump_stack.c:107) 
[ 68.751731][ T610] __ubsan_handle_load_invalid_value (lib/ubsan.c:218 lib/ubsan.c:419) 
[ 68.752063][ T610] loopback_xmit.cold (./include/linux/skbuff.h:4267 drivers/net/loopback.c:77) 
[ 68.752327][ T610] dev_hard_start_xmit (./include/linux/netdevice.h:4991 ./include/linux/netdevice.h:5005 net/core/dev.c:3530 net/core/dev.c:3546) 
[ 68.752606][ T610] __dev_queue_xmit (./include/linux/netdevice.h:3369 net/core/dev.c:4338) 
[ 68.752870][ T610] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 68.753129][ T610] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 68.753472][ T610] ? __pfx___dev_queue_xmit (net/core/dev.c:4246) 
[   68.753768][  T610]  ip_fin
DETECTED CRASH, lowering timeout
ish_output2+0x7ef/0x1980 
[ 68.754043][ T610] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 68.754334][ T610] ? __ip_finish_output (./include/linux/skbuff.h:1627 ./include/linux/skbuff.h:4943 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) 
[ 68.754612][ T610] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) 
[ 68.754834][ T610] ? __skb_checksum (net/core/skbuff.c:3438 (discriminator 4)) 
[ 68.755094][ T610] ? __pfx_ip_output (net/ipv4/ip_output.c:427) 
[ 68.755345][ T610] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 68.755656][ T610] ? ip_local_out (./include/linux/skbuff.h:1139 ./include/net/dst.h:450 net/ipv4/ip_output.c:129) 
[ 68.755910][ T610] __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4)) 
[ 68.756168][ T610] ? dccp_v4_send_check (net/dccp/ipv4.c:387) dccp_ipv4
[ 68.756505][ T610] dccp_transmit_skb (net/dccp/output.c:138) dccp
[ 68.756819][ T610] ? __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:1602 (discriminator 4)) 
[ 68.757070][ T610] dccp_connect (net/dccp/output.c:570) dccp
[ 68.757355][ T610] dccp_v4_connect (net/dccp/ipv4.c:135) dccp_ipv4
[ 68.757683][ T610] __inet_stream_connect (net/ipv4/af_inet.c:678) 
[ 68.757963][ T610] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 68.758308][ T610] inet_stream_connect (net/ipv4/af_inet.c:750) 
[ 68.758572][ T610] __sys_connect (net/socket.c:2048 net/socket.c:2065) 
[ 68.758820][ T610] ? __pfx___sys_connect (net/socket.c:2055) 
[ 68.759096][ T610] ? __pfx___sys_setsockopt (net/socket.c:2324) 
[ 68.759377][ T610] ? __sys_socket (net/socket.c:497 net/socket.c:1715) 
[ 68.759627][ T610] ? __pfx___sys_socket (net/socket.c:1702) 
[ 68.759892][ T610] ? __pfx___x64_sys_epoll_ctl (fs/eventpoll.c:2383) 
[ 68.760186][ T610] ? fd_install (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:865 fs/file.c:626) 
[ 68.760435][ T610] __x64_sys_connect (net/socket.c:2072) 
[ 68.760693][ T610] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 68.760934][ T610] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   68.761245][  T610] RIP: 0033:0x7fea2958a3d7
[ 68.761481][ T610] Code: 0a 00 f7 d8 64 89 02 b8 ff ff ff ff eb bc 0f 1f 44 00 00 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:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	b8 ff ff ff ff       	mov    $0xffffffff,%eax
   c:	eb bc                	jmp    0xffffffffffffffca
   e:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  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
[   68.762469][  T610] RSP: 002b:00007ffc17d0cc08 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
[   68.762901][  T610] RAX: ffffffffffffffda RBX: 00007ffc17d0cca0 RCX: 00007fea2958a3d7
[   68.763312][  T610] RDX: 0000000000000010 RSI: 00007ffc17d0cc50 RDI: 000000000000000f
[   68.763720][  T610] RBP: 00007ffc17d0ccc4 R08: 0000000000000004 R09: 0000000000000004
[   68.764128][  T610] R10: 00007ffc17d0cc30 R11: 0000000000000246 R12: 000000000000000e


Finger prints:
dump_stack_lvl:__ubsan_handle_load_invalid_value:dev_hard_start_xmit:__dev_queue_xmit