Re: [PATCH v4] x86/boot: Warn on future overlapping memcpy() use
From: Ingo Molnar
Date: Fri Apr 29 2016 - 02:43:51 EST
* Kees Cook <keescook@xxxxxxxxxxxx> wrote:
> If an overlapping memcpy() is ever attempted, we should at least report
> it, in case it might lead to problems, so it could be changed to a
> memmove() call instead.
>
> Suggested-by: Ingo Molnar <mingo@xxxxxxxxxx>
> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
> ---
> v4:
> - use __memcpy not memcpy since we've already done the check.
> v3:
> - call memmove in addition to doing the warning
> v2:
> - warn about overlapping region
> ---
> arch/x86/boot/compressed/string.c | 16 +++++++++++++---
> 1 file changed, 13 insertions(+), 3 deletions(-)
Applied, thanks Kees!
Btw., can we now also remove the memmove() hack from lib/decompress_unxz.c?
Thanks,
Ingo