resource leak in wxWidgets-2.9.0/src/expat/xmlwf/readfilemap.c

[ettl.martin]

Hi friends,

i have found a resource leak in file wxWidgets-2.9.0/src/expat/xmlwf/readfilemap.c at line 59. This means the file descriptor is not closed correctly.

Take a look at the source code:

int
filemap(const char *name,
        void (*processor)(const void *, size_t, const char *, void *arg),
        void *arg)
{
  size_t nbytes;
  int fd;
  int n;
  struct stat sb;
  void *p;

  fd = open(name, O_RDONLY|O_BINARY);
  if (fd < 0) {
    perror(name);
    return 0;
  }
  if (fstat(fd, &sb) < 0) {
    perror(name);
    return 0;
  }
  if (!S_ISREG(sb.st_mode)) {
    fprintf(stderr, "%s: not a regular file\n", name);
    return 0;
  }
  nbytes = sb.st_size;
  p = malloc(nbytes);
  if (!p) {
    fprintf(stderr, "%s: out of memory\n", name);
59    return 0;
  }
....
}

this can easily fixed by adding an close(fd); before return 0;

This was found using the static code analysis tool cppcheck.

Best regards

Martin

[vadz]

We don't use this code, xmlwf contains the sources of a standalone tool which uses expat library and while it's distributed with it wxWidgets has nothing to do with it and I don't want to change any 3rd party sources without good reason to avoid introducing conflicts which will complicate upgrading them to the next version.

You should probably report this as a bug to expat/xmlwf maintainers (after checking that it's still present in the latest version).