mirror of https://github.com/google/oss-fuzz.git
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
#include <stdio.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include <inttypes.h>
|
|
#include "zlib.h"
|
|
|
|
#define CHECK_ERR(err, msg) { \
|
|
if (err != Z_OK) { \
|
|
fprintf(stderr, "%s error: %d\n", msg, err); \
|
|
exit(1); \
|
|
} \
|
|
}
|
|
|
|
static const uint8_t *data;
|
|
static size_t dataLen;
|
|
static alloc_func zalloc = NULL;
|
|
static free_func zfree = NULL;
|
|
|
|
/* ===========================================================================
|
|
* Test deflate() with small buffers
|
|
*/
|
|
void test_deflate(unsigned char *compr, size_t comprLen) {
|
|
z_stream c_stream; /* compression stream */
|
|
int err;
|
|
unsigned long len = dataLen;
|
|
|
|
c_stream.zalloc = zalloc;
|
|
c_stream.zfree = zfree;
|
|
c_stream.opaque = (void *)0;
|
|
|
|
err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
|
|
CHECK_ERR(err, "deflateInit");
|
|
|
|
c_stream.next_in = (Bytef *)data;
|
|
c_stream.next_out = compr;
|
|
|
|
while (c_stream.total_in != len && c_stream.total_out < comprLen) {
|
|
c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
|
|
err = deflate(&c_stream, Z_NO_FLUSH);
|
|
CHECK_ERR(err, "deflate small 1");
|
|
}
|
|
/* Finish the stream, still forcing small buffers: */
|
|
for (;;) {
|
|
c_stream.avail_out = 1;
|
|
err = deflate(&c_stream, Z_FINISH);
|
|
if (err == Z_STREAM_END)
|
|
break;
|
|
CHECK_ERR(err, "deflate small 2");
|
|
}
|
|
|
|
err = deflateEnd(&c_stream);
|
|
CHECK_ERR(err, "deflateEnd");
|
|
}
|
|
|
|
/* ===========================================================================
|
|
* Test inflate() with small buffers
|
|
*/
|
|
void test_inflate(unsigned char *compr, size_t comprLen, unsigned char *uncompr,
|
|
size_t uncomprLen) {
|
|
int err;
|
|
z_stream d_stream; /* decompression stream */
|
|
|
|
d_stream.zalloc = zalloc;
|
|
d_stream.zfree = zfree;
|
|
d_stream.opaque = (void *)0;
|
|
|
|
d_stream.next_in = compr;
|
|
d_stream.avail_in = 0;
|
|
d_stream.next_out = uncompr;
|
|
|
|
err = inflateInit(&d_stream);
|
|
CHECK_ERR(err, "inflateInit");
|
|
|
|
while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) {
|
|
d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
|
|
err = inflate(&d_stream, Z_NO_FLUSH);
|
|
if (err == Z_STREAM_END)
|
|
break;
|
|
CHECK_ERR(err, "inflate");
|
|
}
|
|
|
|
err = inflateEnd(&d_stream);
|
|
CHECK_ERR(err, "inflateEnd");
|
|
|
|
if (memcmp(uncompr, data, dataLen)) {
|
|
fprintf(stderr, "bad inflate\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
int LLVMFuzzerTestOneInput(const uint8_t *d, size_t size) {
|
|
size_t comprLen = compressBound(size);
|
|
size_t uncomprLen = size;
|
|
uint8_t *compr, *uncompr;
|
|
|
|
/* Discard inputs larger than 1Mb. */
|
|
static size_t kMaxSize = 1024 * 1024;
|
|
|
|
if (size < 1 || size > kMaxSize)
|
|
return 0;
|
|
|
|
data = d;
|
|
dataLen = size;
|
|
compr = (uint8_t *)calloc(1, comprLen);
|
|
uncompr = (uint8_t *)calloc(1, uncomprLen);
|
|
|
|
test_deflate(compr, comprLen);
|
|
test_inflate(compr, comprLen, uncompr, uncomprLen);
|
|
|
|
free(compr);
|
|
free(uncompr);
|
|
|
|
/* This function must return 0. */
|
|
return 0;
|
|
}
|