Re: [PATCH] crypto: testmgr - test in-place en/decryption with two sglists

From: Giovanni Cabiddu
Date: Fri Apr 01 2022 - 04:30:30 EST

On Sat, Mar 26, 2022 at 12:11:59AM -0700, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@xxxxxxxxxx>
> As was established in the thread
> many crypto API users doing in-place en/decryption don't use the same
> scatterlist pointers for the source and destination, but rather use
> separate scatterlists that point to the same memory. This case isn't
> tested by the self-tests, resulting in bugs.
> This is the natural usage of the crypto API in some cases, so requiring
> API users to avoid this usage is not reasonable.
> Therefore, update the self-tests to start testing this case.
> Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
FWIW, I tried this with QAT and I don't see any issue.