samba-mirror/lib/fuzzing/fuzz_ldb_comparison_fold.c

/*
   Fuzzing ldb_comparison_fold()
   Copyright (C) Catalyst IT 2020

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "fuzzing/fuzzing.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_handlers.h"

int LLVMFuzzerInitialize(int *argc, char ***argv)
{
	return 0;
}


int LLVMFuzzerTestOneInput(const uint8_t *input, size_t len)
{
	struct ldb_val v1, v2;
	struct ldb_context *ldb = NULL;

	if (len < 2) {
		return 0;
	}

	v1.length = PULL_LE_U16(input, 0);
	if (v1.length > len - 2) {
		/* the exact case of v2.length == 0 is still available */
		return 0;
	}
	len -= 2;
	input += 2;

	ldb = ldb_init(NULL, NULL);
	if (ldb == NULL) {
		return 0;
	}

	v1.data = talloc_memdup(ldb, input, v1.length);
	v2.length = len - v1.length;
	v2.data = talloc_memdup(ldb, input + v1.length, v2.length);

	ldb_comparison_fold(ldb, ldb, &v1, &v2);
	talloc_free(ldb);
	return 0;
}