Added fuzzer to integrate Hiredis into OSS-fuzz

fuzzing/format_command_fuzzer.c

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2020, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2020, Pieter Noordhuis <pcnoordhuis at gmail dot com>
+ * Copyright (c) 2020, Matt Stancliff <matt at genges dot com>,
+ *                     Jan-Erik Rediger <janerik at fnordig dot com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include "hiredis.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+
+	if((int)size<3)
+		return 0;
+
+	char *new_str = (char *)malloc(size+1);
+	if (new_str == NULL)
+		return 0;
+
+	char *cmd;
+	int len;
+
+	memcpy(new_str, data, size);
+	new_str[size] = '\0';
+
+	len = redisFormatCommand(&cmd, new_str);
+
+	if(cmd!=NULL)
+		hi_free(cmd);
+	free(new_str);
+	return 0;
+}