OSV-2021-857 Heap-buffer-overflow in mk_string_copy_substr

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35202 Crash type: Heap-buffer-overflow READ Crash state: mkstringcopysubstr mkrconfmetaadd mkrconfread...

OSV-2020-2241 Heap-buffer-overflow in mk_string_copy_substr

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28277 Crash type: Heap-buffer-overflow READ Crash state: mkstringcopysubstr mkrconfmetaadd mkrconfread...