oss-fuzz/fuzz-config.c

   1 #include "git-compat-util.h"
   2 #include "config.h"
   3
   4 int LLVMFuzzerTestOneInput(const uint8_t *, size_t);
   5 static int config_parser_callback(const char *, const char *,
   6                                         const struct config_context *, void *);
   7
   8 static int config_parser_callback(const char *key, const char *value,
   9                                         const struct config_context *ctx UNUSED,
  10                                         void *data UNUSED)
  11 {
  12         /*
  13          * Visit every byte of memory we are given to make sure the parser
  14          * gave it to us appropriately. We need to unconditionally return 0,
  15          * but we also want to prevent the strlen from being optimized away.
  16          */
  17         size_t c = strlen(key);
  18
  19         if (value)
  20                 c += strlen(value);
  21         return c == SIZE_MAX;
  22 }
  23
  24 int LLVMFuzzerTestOneInput(const uint8_t *data, const size_t size)
  25 {
  26         struct config_options config_opts = { 0 };
  27
  28         config_opts.error_action = CONFIG_ERROR_SILENT;
  29         git_config_from_mem(config_parser_callback, CONFIG_ORIGIN_BLOB,
  30                                 "fuzztest-config", (const char *)data, size, NULL,
  31                                 CONFIG_SCOPE_UNKNOWN, &config_opts);
  32         return 0;
  33 }