commit 502585c755 upstream.
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 <email@example.com>
Signed-off-by: Greg Kroah-Hartman <firstname.lastname@example.org>