On Thu, Dec 03, 2020 at 12:10:10PM -0600, Tom Lendacky wrote: > Since that struct is used in multiple places, I think basing it on the array > size is the best way to go. The main point of the check is just to be sure > you don't read outside of the array.
Well, what happens if someone increases the array size of: struct insn_field { union { insn_byte_t bytes[4]; ^^^^ ? That's why a separate array only for legacy prefixes would be better in the long run. The array size check is good as a short-term fix for stable. I'd say. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette