src/udev/fuzz-udev-rules.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <stdio.h>
   4
   5 #include "fd-util.h"
   6 #include "fs-util.h"
   7 #include "fuzz.h"
   8 #include "tests.h"
   9 #include "tmpfile-util.h"
  10 #include "udev-rules.h"
  11
  12 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  13         _cleanup_(udev_rules_freep) UdevRules *rules = NULL;
  14         _cleanup_fclose_ FILE *f = NULL;
  15         _cleanup_(unlink_tempfilep) char filename[] = "/tmp/fuzz-udev-rules.XXXXXX";
  16         int r;
  17
  18         if (outside_size_range(size, 0, 65536))
  19                 return 0;
  20
  21         if (!getenv("SYSTEMD_LOG_LEVEL"))
  22                 log_set_max_level(LOG_CRIT);
  23
  24         assert_se(fmkostemp_safe(filename, "r+", &f) == 0);
  25         if (size != 0)
  26                 assert_se(fwrite(data, size, 1, f) == 1);
  27         fflush(f);
  28
  29         assert_se(rules = udev_rules_new(RESOLVE_NAME_EARLY));
  30         r = udev_rules_parse_file(rules, filename, /* extra_checks = */ false, NULL);
  31         log_info_errno(r, "Parsing %s: %m", filename);
  32         assert_se(r >= 0 ||             /* OK */
  33                   r == -ENOBUFS);       /* line length exceeded */
  34
  35         return 0;
  36 }