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crash ucl_add_string_fuzzer.c by ensuring null-termination of strings #314

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crash ucl_add_string_fuzzer.c by ensuring null-termination of strings #314

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10 changes: 7 additions & 3 deletions tests/fuzzers/ucl_add_string_fuzzer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -8,9 +8,13 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
// We dont null-terminate the string and by the design
// of the API passing 0 as size with non null-terminated string
// gives undefined behavior.
if(size==0){
return 0;
}
if(size == 0 || data[size-1] != '\0') {
char *new_data = (char *)malloc(size + 1);
memcpy(new_data, data, size);
new_data[size] = '\0';
data = (const uint8_t *)new_data;
size++;
}
struct ucl_parser *parser;
parser = ucl_parser_new(0);

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