1 files changed, 57 insertions, 0 deletions
diff --git a/fluent-bit/tests/internal/fuzzers/config_random_fuzzer.c b/fluent-bit/tests/internal/fuzzers/config_random_fuzzer.c
new file mode 100644
index 00000000..ead06ad0
--- /dev/null
+++ b/fluent-bit/tests/internal/fuzzers/config_random_fuzzer.c
@@ -0,0 +1,57 @@
+/*  Fluent Bit
+ *  ==========
+ *  Copyright (C) 2019-2021 The Fluent Bit Authors
+ *  Copyright (C) 2015-2018 Treasure Data Inc.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <fluent-bit/flb_parser.h>
+#include <fluent-bit/flb_slist.h>
+#include "flb_fuzz_header.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    /* Set fuzzer-malloc chance of failure */
+    flb_malloc_p = 0;
+    flb_malloc_mod = 25000;
+
+    /* Limit the size of the config files to 32KB. */
+    if (size > 32768) {
+        return 0;
+    }
+
+    /* Write the config file to a location we know OSS-Fuzz has */
+    char filename[256];
+    sprintf(filename, "/tmp/libfuzzer.%d", getpid());
+    FILE *fp = fopen(filename, "wb");
+    if (!fp) {
+        return 0;
+    }
+    fwrite(data, size, 1, fp);
+    fclose(fp);
+
+    /* Now parse a random config file */
+    struct flb_config *config = NULL;
+    config = flb_config_init();
+    flb_parser_conf_file(filename, config);
+    flb_parser_exit(config);
+    flb_config_exit(config);
+
+    /* Cleanup written config file */
+    unlink(filename);
+
+    return 0;
+}