Re: [PATCH] arch/x86: Fix size overflows in sgx_encl_create()

[Dave Hansen]

On 3/4/25 14:56, Jarkko Sakkinen wrote:
> The total size calculated for EPC can overflow u64 given the added up page
> for SECS.  Further, the total size calculated for shmem can overflow even
> when the EPC size stays within limits of u64, given that it adds the extra
> space for 128 byte PCMD structures (one for each page).
> 
> Address this by adding the necessary validation for each partial results
> before going forward. Return -E2BIG when an overflow is detected.

Wouldn't this be a lot simpler if we just had some sane limit that's
*FAR* below where u64 will overflow?