tree a45abc4bb0cf3c9c43015e39c427a2e41f156d4b
parent 41b948490e467fa7fbeda63b0e707d3863c53e57
author Todd Kjos <tkjos@android.com> 1556134278 -0700
committer Todd Kjos <tkjos@google.com> 1560364788 -0700

UPSTREAM: binder: check for overflow when alloc for security context

commit 0b0509508beff65c1d50541861bc0d4973487dc5 upstream.

When allocating space in the target buffer for the security context,
make sure the extra_buffers_size doesn't overflow. This can only
happen if the given size is invalid, but an overflow can turn it
into a valid size. Fail the transaction if an overflow is detected.

Bug: 130571081
Change-Id: Ibaec652d2073491cc426a4a24004a848348316bf
Signed-off-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>