libselinux: matchpathcon: bad handling of symlinks in /

The realpath_not_final() function did not properly handle symlinks in
the / directory.  The reason is because when it determined the symlink
was in the root directory it would set the resolved portion of the path
to /, it would then add a / to the end of the resolved portion, and then
append the symlink name.  The fix is to instead set the resolved portion
to "".  Thus when the '/' at the end of the resolved portion is added it
will be correct.

While I am at it, strip extraneous leading / so that //tmp returns /tmp.

Signed-off-by: Eric Paris <eparis@redhat.com>
1 file changed