Staring from glibc 2.17 the crypt() function will error out and return NULL if
the seed or "correct" is invalid. The failure case for this is the sudo user
having a locked account in /etc/shadow, so their password is "!", which is an
invalid hash. crypt() never returned NULL previously so this is crashing in
strcmp().
[ YOCTO #4241 ]
Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
