[VPP-1579] VPP crashes when deleting a route

[vvalderrv]

When deleting a route (FIB table only had handful of routes) the following traceback occurred (VPP 19.01):

 

Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: received signal SIGSEGV, PC 0x7f361cf3d407, faulting address 0x7f5ddcfe7854
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #0 0x00007f361c681ae8 0x7f361c681ae8
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #1 0x00007f361c3ca030 0x7f361c3ca030
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #2 0x00007f361cf3d407 fib_path_list_get_resolving_interface + 0x17
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #3 0x00007f361cf3a204 0x7f361cf3a204
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #4 0x00007f361cf38c1b fib_entry_src_action_reactivate + 0xdb
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #5 0x00007f361cf36161 fib_entry_special_remove + 0x191
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #6 0x00007f361cf2c761 fib_table_entry_special_remove + 0x91
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #7 0x00007f361cf3ff10 0x7f361cf3ff10
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #8 0x00007f361cf40fc4 fib_path_destroy + 0x64
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #9 0x00007f361cf3b043 0x7f361cf3b043
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #10 0x00007f361cf37a79 fib_entry_src_action_deactivate + 0x109
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #11 0x00007f361cf37e69 fib_entry_src_action_remove + 0x199
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #12 0x00007f361cf38f54 fib_entry_src_action_path_remove + 0xe4
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #13 0x00007f361cf35ec3 fib_entry_path_remove + 0x53
Mar 04 16:24:48 nfvpe-02.oot.lab.eng.bos.redhat.com vnet[25585]: #14 0x00007f361cf2cc75 fib_table_entry_path_remove2 + 0x135