Re: [PATCH 7/8] x86, microcode, intel: guard against misaligned microcode data

Borislav Petkov
2014-11-11T17:14:05Z

On Tue, Nov 11, 2014 at 02:57:31PM -0200, Henrique de Moraes Holschuh wrote:
> Meh, I don't know where I came up with the wrong information that kmalloc
> aligned to 16-bytes instead of 8 bytes.
>
> I do wonder why I didn't hit this while testing, though. Maybe an artifact
> of slub, or just my luck that I never got a memory block that was not
> aligned to 16 bytes.

The ARCH_KMALLOC_MINALIGN is conditioned on ARCH_DMA_MINALIGN and a
bunch of other things. All I'm saying is, this needs a careful study
when, if at all, kmalloc will not give an 16-byte aligned buffer.

--
Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
--