Re: [PATCH v5 4/6] x86/microcode/AMD: Check microcode container data in the late loader

Maciej S. Szmigiero
2018-05-02T00:47:46Z

On 01.05.2018 22:03, Borislav Petkov wrote:
> On Tue, May 01, 2018 at 06:19:56PM +0200, Maciej S. Szmigiero wrote:
>> -EINVAL cast to unsigned int is 4294967274 and this value is also
>> a valid count of bytes to skip that this function can return.
>
> And where exactly in the *old* code do we do that?
>

The old code returned this value as a signed int, but then any
"patch_size" value (which is u32) above INT_MAX read from a section header
wrapped around to a negative pseudo-error code (which likely didn't match
any actual error number).

Maciej