[PATCH] malloc: Correct size computation in realloc for dumped fake mmapped chunks

[Mike Frysinger]

On 08 Jun 2016 20:51, Florian Weimer wrote:
> For regular mmapped chunks there are two size fields (hence a reduction
> by 2 * SIZE_SZ bytes), but for fake chunks, we only have one size field,
> so we need to subtract SIZE_SZ bytes.
> 
> This was initially reported as Emacs bug 23726.

is it normally user visible ?  if so, i think we'd want a bug on our side
too for it.
-mike
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