91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/*
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* Copyright (c) 2021 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#if defined(HAVE_STDINT_H)
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# include <stdint.h>
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#elif defined(HAVE_INTTYPES_H)
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# include <inttypes.h>
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#endif
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#include "sudo_compat.h"
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#include "sudo_debug.h"
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#include "sudo_eventlog.h"
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#include "sudo_iolog.h"
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#include "sudo_util.h"
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#include "iolog_json.h"
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static FILE *
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open_data(const uint8_t *data, size_t size)
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{
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#ifdef HAVE_FMEMOPEN
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/* Operate in-memory. */
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return fmemopen((void *)data, size, "r");
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#else
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char tempfile[] = "/tmp/json.XXXXXX";
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size_t nwritten;
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int fd;
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/* Use (unlinked) temporary file. */
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fd = mkstemp(tempfile);
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if (fd == -1)
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return NULL;
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unlink(tempfile);
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nwritten = write(fd, data, size);
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if (nwritten != size) {
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close(fd);
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return NULL;
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}
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lseek(fd, 0, SEEK_SET);
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return fdopen(fd, "r");
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#endif
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}
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int
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LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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{
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struct eventlog *evlog = NULL;
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FILE *fp;
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setprogname("fuzz_iolog_json");
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fp = open_data(data, size);
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if (fp == NULL)
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return 0;
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/* Parsed contents of an log.json file are stored in evlog. */
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evlog = calloc(1, sizeof(*evlog));
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if (evlog != NULL) {
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evlog->runuid = (uid_t)-1;
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evlog->rungid = (gid_t)-1;
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/* Try to parse buffer as a JSON-format I/O log info file. */
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iolog_parse_loginfo_json(fp, "fuzz.json", evlog);
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eventlog_free(evlog);
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}
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fclose(fp);
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fflush(stdout);
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return 0;
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}
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