[PATCH] lib: zlib: Use post-increment only in inffast.c.

[Sergei Antonov]

On Sun, 11 Sept 2022 at 11:47, Jit Loon Lim <jit.loon.lim at intel.com> wrote:
>
> From: Chin Liang See <chin.liang.see at intel.com>
>
> An old inffast.c optimization turns out to not be optimal anymore
> with modern compilers, and furthermore was not compliant with the
> C standard, for which decrementing a pointer before its allocated
> memory is undefined. Per the recommendation of a security audit of
> the zlib code by Trail of Bits and TrustInSoft, in support of the
> Mozilla Foundation, this "optimization" was removed, in order to
> avoid the possibility of undefined behavior.

A similar change was merged into an official zlib in 2016:
https://github.com/madler/zlib/commit/9aaec95e82117
It makes me wonder can zlib be used as an external project in U-Boot?
To be up to date with zlib development.