[PATCH] Set behavior of sprintf-like functions with overlapping source and destination

[Zack Weinberg]

On Thu, Dec 27, 2018 at 8:46 AM Gabriel F. T. Gomes
<gabriel@inconstante.eti.br> wrote:
> On Thu, Dec 27, 2018 at 11:15:06AM +0530, Siddhesh Poyarekar wrote:
> > Thanks, to clarify, is your position that we revert to old behaviour (for
> > now) for the default case only or for everything, including _FORTIFY_SOURCE?
>
> The _FORTIFY_SOURCE version did not change behaviour...  Even before
> Zack's patches, it would overwrite overlapping buffers.  This means that
> this patch, as it is today, reverts all behavior to what it used to be.

Yes.  My position right now is that we should merge Gabriel's patch as
is -- including the test case! -- for 2.29, and consider whether we
want to make any further changes after the release.

zw