OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4459
Crash type: Heap-use-after-free READ 6
Crash state:
nl::wpantund::SpinelNCPInstance::should_filter_address
nl::wpantund::SpinelNCPInstance::handle_ncp_spinel_value_inserted
nl::wpantund::SpinelNCPInstance::handle_ncp_spinel_callback