Re: [PATCH 1/4] elf: Only process multiple tunable once (BZ 31686)

[Florian Weimer <fweimer@redhat.com>]

* Adhemerval Zanella:

> The parse_tunables_string is a tunable entry on the 'tunable_list' list
> to be set later without checking if the entry is already present.  If
> leads to a stack overflow if the tunable is set multiple times,
> for instance:
>
>   GLIBC_TUNABLES=glibc.malloc.check=2:... (repeat over the number of
>   total support for different tunable).
>
> Instead, use the index of the tunable list to get the expected tunable
> entry.  Since now the initial list is zero-initialized, the compiler
> might emit an extra memset and this requires some minor adjustment
> on some ports.
>
> Checked on x86_64-linux-gnu and aarch64-linux-gnu.
>
> Reported-by: Yuto Maeda <maeda@cyberdefense.jp>

Is this fixing a particular commit?  If it does, could you mention that
in the commit message?

Thanks,
Florian