tree ceadf8d793ceaae32940754291fbd056a7cfa2ce
parent fb411b837b587a32046dc4f369acb93a10b1def8
author Dave Martin <Dave.Martin@arm.com> 1490623854 +0100
committer Linus Torvalds <torvalds@linux-foundation.org> 1490802857 -0700

h8300/ptrace: Fix incorrect register transfer count

regs_set() and regs_get() are vulnerable to an off-by-1 buffer overrun
if CONFIG_CPU_H8S is set, since this adds an extra entry to
register_offset[] but not to user_regs_struct.

So, iterate over user_regs_struct based on its actual size, not based on
the length of register_offset[].

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>