1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
#include <fluent-bit.h>
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <sys/stat.h>
#include <fluent-bit/flb_input_chunk.h>
#include <fluent-bit/flb_storage.h>
#include <fluent-bit/flb_router.h>
#include <fluent-bit/flb_time.h>
#include "chunkio/chunkio.h"
#include "flb_fuzz_header.h"
const char *input_chunk_property_keywords[] = {
"log_suppress_interval",
"routable",
"alias",
"mem_buf_limit",
"listen",
"log_level",
"host",
"port",
"ipv6",
"net.",
"tls",
"tls.verify",
"tls.debug",
"tls.ca_path",
"tls.key_file",
"tls.vhost",
"tls.ca_file",
"tls.crt_file",
"tls.key_passwd",
"threaded",
"storage.type",
};
int LLVMFuzzerTestOneInput(const uint8_t *data3, size_t size3)
{
int i;
int ret;
int in_ffd;
int out_ffd;
flb_ctx_t *ctx;
size_t total_bytes;
struct flb_input_instance *i_ins;
struct mk_list *tmp;
struct mk_list *head;
struct flb_input_chunk *ic;
struct flb_task *task;
if (size3 < 60) {
return 0;
}
/* Set fuzzer-malloc chance of failure */
flb_malloc_p = 0;
flb_malloc_mod = 25000;
char *input_buffer1 = get_null_terminated(30, &data3, &size3);
if (input_buffer1 == NULL) {
return 0;
}
size_t input_buffer1_len = strlen(input_buffer1);
char *input_buffer2 = get_null_terminated(10, &data3, &size3);
if (input_buffer2 == NULL) {
return 0;
}
size_t input_buffer_len2 = strlen(input_buffer2);
char *input_buffer3 = get_null_terminated(10, &data3, &size3);
if (input_buffer3 == NULL) {
return 0;
}
size_t input_buffer_len3 = strlen(input_buffer3);
/* Create context, flush every second (some checks omitted here) */
ctx = flb_create();
/* create chunks in /tmp folder */
ret = flb_service_set(ctx,
"flush", "2", "grace", "1",
"storage.path", "/tmp/input-chunk-test/",
"Log_Level", "error",
NULL);
if (ret != 0) {
flb_free(input_buffer1);
flb_free(input_buffer2);
flb_free(input_buffer3);
return 0;
}
/* Lib input mode */
in_ffd = flb_input(ctx, (char *) "lib", NULL);
ret = flb_input_set(ctx, in_ffd,
"tag", "test",
"storage.type", "filesystem",
NULL);
if (ret != 0) {
flb_free(input_buffer1);
flb_free(input_buffer2);
flb_free(input_buffer3);
return 0;
}
/* an invalid output destination */
out_ffd = flb_output(ctx, (char *) "http", NULL);
flb_output_set(ctx, out_ffd,
"match", "test",
"Host", "127.0.0.1",
"Port", "1",
"storage.total_limit_size", "1K",
NULL);
/* Start */
ret = flb_start(ctx);
if (ret != 0) {
flb_free(input_buffer1);
flb_free(input_buffer2);
flb_free(input_buffer3);
return 0;
}
i_ins = mk_list_entry_first(&ctx->config->inputs,
struct flb_input_instance,
_head);
/* main fuzzing logic */
flb_input_set_property(i_ins, input_buffer2, input_buffer3);
for (int i = 0; i < sizeof(input_chunk_property_keywords)/sizeof(char*); i++) {
flb_input_set_property(i_ins,
input_chunk_property_keywords[i],
input_buffer3);
}
/* Ingest fuzz data sample */
for (i = 0; i < 2; ++i) {
flb_lib_push(ctx, in_ffd, (char *) input_buffer1, input_buffer1_len);
sleep(1);
total_bytes = flb_input_chunk_total_size(i_ins);
ret = total_bytes > 1000 ? -1 : 0;
}
/* FORCE clean up test tasks */
mk_list_foreach_safe(head, tmp, &i_ins->tasks) {
task = mk_list_entry(head, struct flb_task, _head);
flb_info("[task] cleanup test task");
flb_task_destroy(task, FLB_TRUE);
}
/* clean up test chunks */
mk_list_foreach_safe(head, tmp, &i_ins->chunks) {
ic = mk_list_entry(head, struct flb_input_chunk, _head);
flb_input_chunk_destroy(ic, FLB_TRUE);
}
flb_free(input_buffer1);
flb_free(input_buffer2);
flb_free(input_buffer3);
flb_time_msleep(200);
flb_stop(ctx);
flb_destroy(ctx);
}
|
