Add PHAR fuzzer

sapi/fuzzer/Makefile.frag

@@ -16,3 +16,6 @@ $(SAPI_FUZZER_PATH)/php-fuzz-exif: $(PHP_GLOBAL_OBJS) $(PHP_SAPI_OBJS) $(PHP_FUZ
 
 $(SAPI_FUZZER_PATH)/php-fuzz-mbstring: $(PHP_GLOBAL_OBJS) $(PHP_SAPI_OBJS) $(PHP_FUZZER_MBSTRING_OBJS)
 	$(FUZZER_BUILD) $(PHP_FUZZER_MBSTRING_OBJS) -o $@
+
+$(SAPI_FUZZER_PATH)/php-fuzz-phar: $(PHP_GLOBAL_OBJS) $(PHP_SAPI_OBJS) $(PHP_FUZZER_PHAR_OBJS)
+	$(FUZZER_BUILD) $(PHP_FUZZER_PHAR_OBJS) -o $@

sapi/fuzzer/config.m4

@@ -87,6 +87,9 @@ if test "$PHP_FUZZER" != "no"; then
   if test -n "$enable_mbstring" && test "$enable_mbstring" != "no"; then
     PHP_FUZZER_TARGET([mbstring], PHP_FUZZER_MBSTRING_OBJS)
   fi
+  if test -n "$enable_phar" && test "$enable_phar" != "no"; then
+    PHP_FUZZER_TARGET([phar], PHP_FUZZER_PHAR_OBJS)
+  fi
 
   PHP_SUBST(PHP_FUZZER_BINARIES)
 fi

sapi/fuzzer/fuzzer-phar.c

@@ -0,0 +1,77 @@
+/*
+   +----------------------------------------------------------------------+
+   | Copyright (c) The PHP Group                                          |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 3.01 of the PHP license,      |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available through the world-wide-web at the following url:           |
+   | http://www.php.net/license/3_01.txt                                  |
+   | If you did not receive a copy of the PHP license and are unable to   |
+   | obtain it through the world-wide-web, please send a note to          |
+   | license@php.net so we can mail you a copy immediately.               |
+   +----------------------------------------------------------------------+
+   | Authors: Stanislav Malyshev <stas@php.net>                           |
+   +----------------------------------------------------------------------+
+ */
+
+#include "fuzzer.h"
+
+#include "Zend/zend.h"
+#include "main/php_config.h"
+#include "main/php_main.h"
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "fuzzer-sapi.h"
+
+int phar_create_or_parse_filename(char *fname, size_t fname_len, char *alias, size_t alias_len, zend_bool is_data, uint32_t options, void** pphar, char **error);
+void phar_request_initialize(void);
+
+int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+	void *phar_data;
+	char *tmp_filename;
+	int tmpfd;
+
+	if (Size > 256 * 1024) {
+		/* Large inputs have a large impact on fuzzer performance,
+		 * but are unlikely to be necessary to reach new codepaths. */
+		return 0;
+	}
+
+	if (fuzzer_request_startup() == FAILURE) {
+		return 0;
+	}
+	phar_request_initialize();
+
+	tmp_filename = estrdup("/tmp/phar-fuzz.temp.XXXXXX");
+	tmpfd = mkstemp(tmp_filename);
+	write(tmpfd, Data, Size);
+	close(tmpfd);
+
+	zend_first_try {
+		phar_create_or_parse_filename(tmp_filename, strlen(tmp_filename), NULL, 0, 1, REPORT_ERRORS, &phar_data, NULL);
+	} zend_end_try();
+
+	/* cleanup */
+	unlink(tmp_filename);
+	efree(tmp_filename);
+	php_request_shutdown(NULL);
+
+	return 0;
+}
+
+int LLVMFuzzerInitialize(int *argc, char ***argv) {
+	/* Gracefully handle bailouts. */
+	putenv("USE_TRACKED_ALLOC=1");
+
+	fuzzer_init_php();
+
+	/* fuzzer_shutdown_php(); */
+	return 0;
+}
+