Vegard Nossum <vegard.nossum@gmail.com> wrote:

> I couldn't reproduce your original failure, but I've attempted to fix
> it by reordering the mutex unlock and bprm free and removing the
> extraneous unlock (see attached patch; it boots for me without
> errors).

Your patch ought to throw up its own lock failure.  You've added a
mutex_unlock() call to the execve success path, but you haven't removed one
from install_exec_creds().  Also, this patch is not sufficient as it doesn't
do anything for compat_do_execve().

Can you try the attached patches instead please?  You may find you have one or
more of them present already if you've pulled your tree recently.

David