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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2021 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>
#if defined(HAVE_STDINT_H)
# include <stdint.h>
#elif defined(HAVE_INTTYPES_H)
# include <inttypes.h>
#endif
#include "sudo_compat.h"
#include "sudo_util.h"
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
sudo_dso_public int main(int argc, char *argv[]);
/*
* Simple driver for fuzzers built for LLVM libfuzzer.
* This stub library allows fuzz targets to be built and run without
* libfuzzer. No actual fuzzing will occur but the provided inputs
* will be tested.
*/
int
main(int argc, char *argv[])
{
struct timespec start_time, stop_time;
size_t filesize, bufsize = 0;
ssize_t nread;
struct stat sb;
uint8_t *buf = NULL;
int fd, i, errors = 0;
int verbose = 0;
long ms;
/* Test provided input files. */
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (*arg == '-') {
if (strncmp(arg, "-verbosity=", sizeof("-verbosity=") - 1) == 0) {
verbose = atoi(arg + sizeof("-verbosity=") - 1);
}
continue;
}
fd = open(arg, O_RDONLY);
if (fd == -1 || fstat(fd, &sb) != 0) {
fprintf(stderr, "open %s: %s\n", arg, strerror(errno));
if (fd != -1)
close(fd);
errors++;
continue;
}
#ifndef __LP64__
if (sizeof(sb.st_size) > sizeof(size_t) && sb.st_size > SSIZE_MAX) {
errno = E2BIG;
fprintf(stderr, "%s: %s\n", arg, strerror(errno));
close(fd);
errors++;
continue;
}
#endif
filesize = sb.st_size;
if (bufsize < filesize) {
void *tmp = realloc(buf, filesize);
if (tmp == NULL) {
fprintf(stderr, "realloc: %s\n", strerror(errno));
close(fd);
errors++;
continue;
}
buf = tmp;
bufsize = filesize;
}
nread = read(fd, buf, filesize);
if ((size_t)nread != filesize) {
if (nread == -1)
fprintf(stderr, "read %s: %s\n", arg, strerror(errno));
else
fprintf(stderr, "read %s: short read\n", arg);
close(fd);
errors++;
continue;
}
close(fd);
/* NOTE: doesn't support LLVMFuzzerInitialize() (but we don't use it) */
if (verbose > 0) {
fprintf(stderr, "Running: %s\n", arg);
sudo_gettime_mono(&start_time);
}
LLVMFuzzerTestOneInput(buf, nread);
if (verbose > 0) {
sudo_gettime_mono(&stop_time);
sudo_timespecsub(&stop_time, &start_time, &stop_time);
ms = (stop_time.tv_sec * 1000) + (stop_time.tv_nsec / 1000000);
fprintf(stderr, "Executed %s in %ld ms\n", arg, ms);
}
}
free(buf);
return errors;
}
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