This fixes some places that dereference user pointers directly instead
of using get_user().
Please especially check my changes to IOCTL_BCM_GET_CURRENT_STATUS. The
original code modified the struct which "arg" was pointing to. I think
this was a bug in the original code and that we only wanted to write to
the OutputBuffer. Also with the original code you could read as much
memory as you wanted so I had to put a cap on OutputLength. The only
value of OutputLength that makes sense is sizeof(LINK_STATE) so now if
OutputLength is not sizeof(LINK_STATE) it returns -EINVAL.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
eccbf04a90