On Fri, Feb 23, 2018 at 05:24:04PM +0900, Misono, Tomohiro wrote:
> On 2018/02/16 4:04, Omar Sandoval wrote:
> > From: Omar Sandoval <osan...@fb.com>
>
> > +static enum btrfs_util_error openat_parent_and_name(int dirfd, const char
> > *path,
> > + char *name, size_t name_len,
> > + int *fd)
> > +{
> > + char *tmp_path, *slash, *dirname, *basename;
> > + size_t len;
> > +
> > + /* Ignore trailing slashes. */
> > + len = strlen(path);
> > + while (len > 1 && path[len - 1] == '/')
> > + len--;
> > +
> > + tmp_path = malloc(len + 1);
> > + if (!tmp_path)
> > + return BTRFS_UTIL_ERROR_NO_MEMORY;
> > + memcpy(tmp_path, path, len);
> > + tmp_path[len] = '\0';
> > +
> > + slash = memrchr(tmp_path, '/', len);
> > + if (slash == tmp_path) {
> > + dirname = "/";
> > + basename = tmp_path + 1;
> > + } else if (slash) {
> > + *slash = '\0';
> > + dirname = tmp_path;
> > + basename = slash + 1;
> > + } else {
> > + dirname = ".";
> > + basename = tmp_path;
> > + }
> > +
> > + len = strlen(basename);
> > + if (len >= name_len) {
> > + errno = ENAMETOOLONG;
>
> tmp_path should be also freed here.
Another good catch, thanks.
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