Crash in zebra ifp->node pointer is NULL in bfd_vrf_topo1 test

[donaldsharp]

#0  raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
50  ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
[Current thread is 1 (Thread 0x7ff485c11840 (LWP 2979723))]
(gdb) bt
#0  raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
#1  0x00007ff48650864b in core_handler (signo=11, siginfo=0x7ffe4965ebf0, context=0x7ffe4965eac0) at lib/sigevent.c:246
#2  <signal handler called>
#3  if_unlink_per_ns (ifp=0x55dbba330b90) at zebra/interface.c:268
#4  0x000055dbb9ab9490 in if_delete_update (pifp=0x7ffe4965f0e0) at zebra/interface.c:774
#5  0x000055dbb9b22d57 in zebra_ns_delete (name=0x7ffe4965f120 "r2-bfd-cust1") at zebra/zebra_netns_notify.c:180
#6  0x000055dbb9b23348 in zebra_ns_notify_read (t=0x7ffe49661390) at zebra/zebra_netns_notify.c:353
#7  0x00007ff486521e73 in event_call (thread=0x7ffe49661390) at lib/event.c:1995
#8  0x00007ff4864af241 in frr_run (master=0x55dbba01ab20) at lib/libfrr.c:1185
#9  0x000055dbb9aca4de in main (argc=10, argv=0x7ffe49661648) at zebra/main.c:465
(gdb) f 3
#3  if_unlink_per_ns (ifp=0x55dbba330b90) at zebra/interface.c:268
268     ifp->node->info = NULL;
(gdb) p ifp->node
$1 = (struct route_node *) 0x0
(gdb) p ifp->name
$2 = "r2-eth1\000\000\000\000\000\000\000\000"
(gdb) f 7
#7  0x00007ff486521e73 in event_call (thread=0x7ffe49661390) at lib/event.c:1995
1995        (*thread->func)(thread);
(gdb) p thread->run
There is no member named run.
(gdb) p *thread
$3 = {type = EVENT_READY, add_type = EVENT_READ, eventitem = {si = {next = 0x0}}, timeritem = {hi = {index = 0}}, ref = 0x55dbb9c7ae38 <zebra_netns_notify_current>, master = 0x55dbba01ab20, 
  func = 0x55dbb9b2317b <zebra_ns_notify_read>, arg = 0x0, u = {val = 18, fd = 18, sands = {tv_sec = 18, tv_usec = 0}}, real = {tv_sec = 237814, tv_usec = 830433}, hist = 0x55dbba3027d0, yield = 10000, 
  xref = 0x55dbb9c23380 <_xref.3>, mtx = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next = 0x0}}, 
    __size = '\000' <repeats 39 times>, __align = 0}, ignore_timer_late = false}
(gdb) p *thread->xref
$4 = {xref = {xrefdata = 0x0, type = XREFT_EVENTSCHED, line = 430, file = 0x55dbb9bb3e1a "zebra/zebra_netns_notify.c", func = 0x55dbb9bb4000 <__func__.0> "zebra_ns_notify_init"}, 
  funcname = 0x55dbb9bb3f68 "zebra_ns_notify_read", dest = 0x55dbb9bb3f7d "&zebra_netns_notify_current", event_type = 0}
(gdb) quit

[donaldsharp]

bfd_vrf_topo1.tar.gz

Note things going sideways early in the test log file for r2/zebra.log.

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