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/* 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_utils.h>
#include <fluent-bit/flb_time.h>
#include <fluent-bit/flb_parser.h>
#include <fluent-bit/flb_parser_decoder.h>
#include "flb_fuzz_header.h"
#define TYPES_LEN 5
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
TIMEOUT_GUARD
char *format = NULL;
char *time_fmt = NULL;
char *time_key = NULL;
char *time_offset = NULL;
char *pregex = NULL;
struct flb_parser_types *types = NULL;
struct flb_config *fuzz_config = NULL;
struct flb_parser *fuzz_parser = NULL;
int time_keep = 0;
int types_len = 0;
/* Set fuzzer-malloc chance of failure */
flb_malloc_mod = 25000;
flb_malloc_p = 0;
if (size < 100) {
return 0;
}
/* json parser */
fuzz_config = flb_config_init();
/* format + pregex */
if (GET_MOD_EQ(4,0)) {
format = "json";
}
else if (GET_MOD_EQ(4,1)) {
format = "regex";
#ifdef PREG_FUZZ
pregex = malloc(30);
pregex[29] = '\0';
memcpy(pregex, data, 29);
data += 29;
size -= 29;
#else
pregex = "^(?<INT>[^ ]+) (?<FLOAT>[^ ]+) (?<BOOL>[^ ]+) (?<STRING>.+)$";
#endif
}
else if (GET_MOD_EQ(4,2)) {
format = "ltsv";
}
else {
format = "logfmt";
}
MOVE_INPUT(1);
/* time_fmt */
if (GET_MOD_EQ(2,1)) {
time_fmt = get_null_terminated(15, &data, &size);
}
MOVE_INPUT(1);
/* time_key */
if (GET_MOD_EQ(2,1)) {
time_key = get_null_terminated(15, &data, &size);
}
MOVE_INPUT(1);
/* time_offset */
if (GET_MOD_EQ(2,1)) {
time_offset = get_null_terminated(15, &data, &size);
}
MOVE_INPUT(1);
/* time_keep */
time_keep = (GET_MOD_EQ(2,1)) ? MK_TRUE : MK_FALSE;
MOVE_INPUT(1);
/* types_str */
if (GET_MOD_EQ(2,1)) {
types = flb_malloc(sizeof(struct flb_parser_types) * TYPES_LEN);
char *parser_type_keys[5] = {"AAA", "BBB", "CCC", "DDD", "EEE" };
int parser_types[5] = {FLB_PARSER_TYPE_INT, FLB_PARSER_TYPE_FLOAT,
FLB_PARSER_TYPE_BOOL, FLB_PARSER_TYPE_STRING,
FLB_PARSER_TYPE_HEX};
for (int i = 0; i < TYPES_LEN; i++) {
types[i].key = strdup(parser_type_keys[i]);
types[i].key_len = strlen(parser_type_keys[i]);
types[i].type = parser_types[i];
}
types_len = TYPES_LEN;
}
MOVE_INPUT(1);
/* decoders */
struct mk_list *list = NULL;
if (GET_MOD_EQ(2,1)) {
MOVE_INPUT(1);
list = flb_malloc(sizeof(struct mk_list));
mk_list_init(list);
struct flb_parser_dec *dec = malloc(sizeof(struct flb_parser_dec));
dec->key = flb_sds_create_len("AAA", 3);
dec->buffer = flb_sds_create_size(FLB_PARSER_DEC_BUF_SIZE);
dec->add_extra_keys = FLB_TRUE;
mk_list_init(&dec->rules);
mk_list_add(&dec->_head, list);
struct flb_parser_dec_rule *dec_rule = malloc(sizeof(struct flb_parser_dec_rule));
dec_rule->type = (int)(data[0] % 0x02);
MOVE_INPUT(1);
dec_rule->backend = (int)(data[0] % 0x04);
MOVE_INPUT(1);
dec_rule->action = (int)data[0] % 0x03;
mk_list_add(&dec_rule->_head, &dec->rules);
if (GET_MOD_EQ(2,1)) {
struct flb_parser_dec_rule *dec_rule2 = malloc(sizeof(struct flb_parser_dec_rule));
dec_rule2->type = (int)(data[0] % 0x02);
MOVE_INPUT(1);
dec_rule2->backend = (int)(data[0] % 0x04);
MOVE_INPUT(1);
dec_rule->action = (int)data[0] % 0x03;
mk_list_add(&dec_rule2->_head, &dec->rules);
}
}
MOVE_INPUT(1);
/* print our config struct */
flb_utils_print_setup(fuzz_config);
/* now call into the parser */
fuzz_parser = flb_parser_create("fuzzer", format, pregex, FLB_TRUE,
time_fmt, time_key, time_offset, time_keep, 0, FLB_FALSE,
types, types_len, list, fuzz_config);
/* Second step is to use the random parser to parse random input */
if (fuzz_parser != NULL) {
void *out_buf = NULL;
size_t out_size = 0;
struct flb_time out_time;
flb_parser_do(fuzz_parser, (char*)data, size,
&out_buf, &out_size, &out_time);
if (out_buf != NULL) {
free(out_buf);
}
flb_parser_destroy(fuzz_parser);
}
else {
/* Parser creation failed but we still need to clean
* up types and decoders */
if (types != NULL) {
for (int i=0; i< TYPES_LEN; i++){
flb_free(types[i].key);
}
flb_free(types);
}
if (list != NULL) {
flb_parser_decoder_list_destroy(list);
}
}
/* Cleanup everything but the parser */
flb_config_exit(fuzz_config);
if (time_fmt != NULL) {
flb_free(time_fmt);
}
if (time_key != NULL) {
flb_free(time_key);
}
if (time_offset != NULL) {
flb_free(time_offset);
}
#ifdef PREG_FUZZ
if (pregex != NULL) {
flb_free(pregex);
}
#endif
return 0;
}
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