h8300/ptrace: Fix incorrect register transfer count

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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 <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Dave Martin 2017-03-27 15:10:54 +01:00 • committed by Greg Kroah-Hartman

parent d77bd2d6a4

commit 616fe993f4

1 changed files with 5 additions and 3 deletions

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arch/h8300/kernel/ptrace.c

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