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Add fuzzer for legacy I/O log info file.

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This commit is contained in:
Todd C. Miller 2021-02-03 07:41:20 -07:00
parent 29f5f3c53e
commit d2901f4121
4 changed files with 61 additions and 1 deletions
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1
MANIFEST
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@ -117,6 +117,7 @@ lib/iolog/iolog_json.h
lib/iolog/iolog_path.c lib/iolog/iolog_path.c
lib/iolog/iolog_util.c lib/iolog/iolog_util.c
lib/iolog/regress/fuzz/fuzz_iolog_json.c lib/iolog/regress/fuzz/fuzz_iolog_json.c
lib/iolog/regress/fuzz/fuzz_iolog_legacy.c
lib/iolog/regress/host_port/host_port_test.c lib/iolog/regress/host_port/host_port_test.c
lib/iolog/regress/iolog_json/check_iolog_json.c lib/iolog/regress/iolog_json/check_iolog_json.c
lib/iolog/regress/iolog_json/test1.in lib/iolog/regress/iolog_json/test1.in

1
include/sudo_iolog.h
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@ -101,6 +101,7 @@ char *iolog_parse_delay(const char *cp, struct timespec *delay, const char *deci
int iolog_read_timing_record(struct iolog_file *iol, struct timing_closure *timing); int iolog_read_timing_record(struct iolog_file *iol, struct timing_closure *timing);
struct eventlog *iolog_parse_loginfo(int dfd, const char *iolog_dir); struct eventlog *iolog_parse_loginfo(int dfd, const char *iolog_dir);
bool iolog_parse_loginfo_json(FILE *fp, const char *iolog_dir, struct eventlog *evlog); bool iolog_parse_loginfo_json(FILE *fp, const char *iolog_dir, struct eventlog *evlog);
bool iolog_parse_loginfo_legacy(FILE *fp, const char *iolog_dir, struct eventlog *evlog);
void iolog_adjust_delay(struct timespec *delay, struct timespec *max_delay, double scale_factor); void iolog_adjust_delay(struct timespec *delay, struct timespec *max_delay, double scale_factor);
/* iolog_fileio.c */ /* iolog_fileio.c */

2
lib/iolog/iolog_util.c
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@ -49,7 +49,7 @@
static int timing_event_adj; static int timing_event_adj;
static bool bool
iolog_parse_loginfo_legacy(FILE *fp, const char *iolog_dir, iolog_parse_loginfo_legacy(FILE *fp, const char *iolog_dir,
struct eventlog *evlog) struct eventlog *evlog)
{ {

58
lib/iolog/regress/fuzz/fuzz_iolog_legacy.c Normal file
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@ -0,0 +1,58 @@
/*
* 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.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.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_debug.h"
#include "sudo_eventlog.h"
#include "sudo_iolog.h"
#include "sudo_util.h"
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
struct eventlog *evlog = NULL;
FILE *fp;
/* Operate in-memory. */
fp = fmemopen((void *)data, size, "r");
if (fp == NULL)
return 0;
/* Parsed contents of an I/O log info file are stored in evlog. */
evlog = calloc(1, sizeof(*evlog));
if (evlog != NULL) {
evlog->runuid = (uid_t)-1;
evlog->rungid = (gid_t)-1;
/* Try to parse buffer as a legacy-format I/O log info file. */
iolog_parse_loginfo_legacy(fp, "fuzz.legacy", evlog);
eventlog_free(evlog);
}
fclose(fp);
return 0;
}