[linus:master] [crypto] 40b9969796: UBSAN:unsigned-integer-overflow_in_lib/crypto/chacha20poly1305-selftest.c

[Arnd Bergmann]

On Wed, May 28, 2025, at 18:45, Kees Cook wrote:
> On Tue, May 27, 2025 at 11:14:27PM -0700, Eric Biggers wrote:
>> On Wed, May 28, 2025 at 01:15:05PM +0800, kernel test robot wrote:

> I'm not sure how to enforce "don't enable this unless you're developing
> the Overflow Behavior Types" with current Kconfig, given the randconfig
> gap... I have some memory of Arnd doing something special with his
> randconfigs to avoid these kinds of things, but I can't find it now.
>

The main thing I do on the randconfig builds to avoid obscure issues
is to force CONFIG_COMPILE_TEST=y, but that only works for build
testing, not actually running it.

      Arnd