On Thu, 02 Feb 2023 17:30:44 +0000, Mark Brown wrote:
> When copying the EXTRA context our calculation of the amount of data we
> need to copy is incorrect, we only calculate the amount of data needed
> within uc_mcontext.__reserved, not taking account of the fixed portion
> of the context. Add in the offset of the reserved data so that we copy
> everything we should.
>
> This will only cause test failures in cases where the last context in the
> EXTRA context is smaller than the missing data since we don't currently
> validate any of the register data and all the buffers we copy into are
> statically allocated so default to zero meaning that if we walk beyond the
> end of what we copied we'll encounter what looks like a context with magic
> and length both 0 which is a valid terminator record.
>
> [...]
Applied to arm64 (for-next/kselftest), thanks!
[1/1] kselftest/arm64: Copy whole EXTRA context
https://git.kernel.org/arm64/c/6012b8202022
--
Catalin
