Re: [PATCH 0/3] Fix uninitialised reads found with MSAN

> As to the tricky part: MSAN tries to detect reads from uninitialised memory
> at runtime. However you need to ensure that all code performing
> initialisation is built with the right instrumentation (i.e.
> -fsanitize=memory). So you'll immediately run into issues if you link
> against libraries provided by your system (with the exception of libc, as
> MSAN provides some default interceptors for most of libc). In theory you
> should rebuild all dependencies with -fsanitize=memory, although I
> discovered that it's sufficient to recompile only zlib + link git against
> that copy of zlib (which not a very tricky thing to do). Doing this will
> uncover one intentional read from uninitialised memory inside zlib itself.
> This can be worked around with an annotation in zlib (which I'm trying to
> submit upstream at [1]) - but it's also possible to define an override list
> at compile time - I've detailed this in my recipe below).