Add a config file fuzzer
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diff --git a/fuzzers/config_file_fuzzer.c b/fuzzers/config_file_fuzzer.c
new file mode 100644
index 0000000..eafcd10
--- /dev/null
+++ b/fuzzers/config_file_fuzzer.c
@@ -0,0 +1,41 @@
+#include <git2.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <limits.h>
+
+int foreach_cb(const git_config_entry *entry, void *payload) {
+ return 0;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+ static int fd = -1;
+ static char path[] = "/tmp/git.XXXXXX";
+ if (fd < 0) {
+ git_libgit2_init();
+ fd = mkstemp(path);
+ if (fd < 0) {
+ abort();
+ }
+ }
+ if (ftruncate(fd, 0) !=0 ) {
+ abort();
+ }
+ if (lseek(fd, 0, SEEK_SET) != 0) {
+ abort();
+ }
+ if (write(fd, data, size) != size) {
+ abort();
+ }
+
+ git_config *cfg;
+ int err = git_config_open_ondisk(&cfg, path);
+ if (err == 0) {
+ git_config_foreach(cfg, foreach_cb, NULL);
+ git_config_free(cfg);
+ }
+
+ return 0;
+}