Two VMs are instantiated with one vhost interface each cross connected in VPP. A ping from one VM to another crashes VPP. This happens only in debug mode and not in non-debug mode.

Stack trace:

0x00007ffff5948cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) where
#0 0x00007ffff5948cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007ffff594c0d8 in __GI_abort () at abort.c:89
#2 0x000000000040a6ae in os_panic () at /scratch/localadmin/openvpp/vpp/build-data/../vpp/vnet/main.c:266
#3 0x00007ffff64f9aef in debugger () at /scratch/localadmin/openvpp/vpp/build-data/../vppinfra/vppinfra/error.c:81
#4 0x00007ffff64f9efe in _clib_error (how_to_die=2, function_name=0x0, line_number=0,
fmt=0x7ffff712e250 "%s:%d (%s) assertion `%s' fails")
at /scratch/localadmin/openvpp/vpp/build-data/../vppinfra/vppinfra/error.c:139
#5 0x00007ffff709f46c in vhost_user_intfc_tx (vm=0x7fffc51d4504, node=0x7fffc509ae74, frame=0x7fffc5184d00)
at /scratch/localadmin/openvpp/vpp/build-data/../vnet/vnet/devices/virtio/vhost-user.c:1219
#6 0x00007ffff753b963 in dispatch_node (vm=0x7fffc51d4504, node=0x7fffc509ae74, type=VLIB_NODE_TYPE_INTERNAL,
dispatch_state=VLIB_NODE_STATE_POLLING, frame=0x7fffc5184d00, last_time_stamp=5135275865732395)
at /scratch/localadmin/openvpp/vpp/build-data/../vlib/vlib/main.c:996
#7 0x00007ffff753bd7f in dispatch_pending_node (vm=0x7fffc51d4504, p=0x7fffc527943c,
last_time_stamp=5135275865732395) at /scratch/localadmin/openvpp/vpp/build-data/../vlib/vlib/main.c:1124
#8 0x00007ffff7089438 in dpdk_worker_thread_internal (vm=0x7fffc51d4504, callback=0x0, have_io_threads=0)
at /scratch/localadmin/openvpp/vpp/build-data/../vnet/vnet/devices/dpdk/threads.c:219
#9 0x00007ffff70895c7 in dpdk_worker_thread (w=0x7fffc5512c68, io_name=0x7ffff712b96d "io", callback=0x0)
at /scratch/localadmin/openvpp/vpp/build-data/../vnet/vnet/devices/dpdk/threads.c:259
#10 0x00007ffff7089629 in dpdk_worker_thread_fn (arg=0x7fffc5512c68)
at /scratch/localadmin/openvpp/vpp/build-data/../vnet/vnet/devices/dpdk/threads.c:266
#11 0x00007ffff650d270 in clib_calljmp ()
at /scratch/localadmin/openvpp/vpp/build-data/../vppinfra/vppinfra/longjmp.S:110
#12 0x00007fff9a70fbb0 in ?? ()
#13 0x00007ffff755bb75 in vlib_worker_thread_bootstrap_fn (arg=0x7fffc5512c68)
at /scratch/localadmin/openvpp/vpp/build-data/../vlib/vlib/threads.c:480
Backtrace stopped: previous frame inner to this frame (corrupt stack?)