OSV-2020-374 Heap-use-after-free in wmem_strbuf_get_str

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17305 Crash type: Heap-use-after-free READ 8 Crash state: wmemstrbufgetstr dissectrrcPLMNIdentityWithOptionalMCCr6 dissectperconstrainedsequenceof...