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Re: kern/51654: wrong ps_strings breaks emacs20

The following reply was made to PR kern/51654; it has been noted by GNATS.

From: Joerg Sonnenberger <>
Subject: Re: kern/51654: wrong ps_strings breaks emacs20
Date: Sat, 26 Nov 2016 06:49:24 +0100

 On Sat, Nov 26, 2016 at 04:00:00AM +0000, wrote:
 > After updating emacs dumps core. After spending a long time barking up
 > the wrong PaX tree, it seems that the problem is that an invalid
 > pointer is being provided in __ps_strings and this causes _libc_init
 > to segv.
 The address space layout changed. ps_strings is placed at the very top,
 without PAX it is at a fixed address.
 > I haven't the slightest idea why this happens only with emacs but I
 > imagine it's a consequence of the emacs dump/undump mechanism somehow.
 Combine this with the changed MAXUSER address and now certain cached
 locations no longer match.

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