linux-kernel - Re: [PATCH] lib/crypto: blake2s: fix a CFI failure

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Message-ID: <CAHmME9oX+4Ek81xy0nBOegqABH0xYqyONAqinsu7GZ7AaQaqYQ@mail.gmail.com>
Date:   Wed, 19 Jan 2022 10:55:47 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Miles Chen <miles.chen@...iatek.com>
Cc:     ndesaulniers@...gle.com, nathan@...nel.org, ardb@...nel.org,
        davem@...emloft.net, gregkh@...uxfoundation.org,
        herbert@...dor.apana.org.au, linux-arm-kernel@...ts.infradead.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, matthias.bgg@...il.com
Subject: Re: [PATCH] lib/crypto: blake2s: fix a CFI failure

Hi Miles,

I'm actually not able to reproduce your oops. I'm using vanilla clang
13, cross compiling for arm64, with thin LTO enabled and CFI enabled.
Kernel seems to run fine.

Are there other settings that are needed to trigger this? Do you see
it in upstream clang or just the Android fork of clang?

Jason