Fixes a possible buffer overflow.  (There are others)
Author: Danny Milosavljevic <dannym@scratchpost.org>
Date: 2020-11-16

--- a/gcc/gimplify.c.orig	2020-10-29 08:45:11.532479774 +0100
+++ b/gcc/gimplify.c	2020-10-29 08:45:49.584637018 +0100
@@ -5229,7 +5229,7 @@
 	     flexibility, split it into separate input and output
  	     operands.  */
 	  tree input;
-	  char buf[10];
+	  char buf[12];
 
 	  /* Turn the in/out constraint into an output constraint.  */
 	  char *p = xstrdup (constraint);
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<tr><td><span title='2021-03-10 18:01:47 +0100'>2021-03-10</span></td><td><a href='/guix/commit/gnu/services/dbus.scm?id=520bac7ed00a949a0391ad680de65a1498105c2b'>services: Prevent following symlinks during activation.</a><span class='msg-avail'>...<span class='msg-tooltip'>This addresses a potential security issue, where a compromised
service could trick the activation code in changing the permissions,
owner and group of arbitrary files.  However, this patch is
currently only a partial fix, due to a TOCTTOU (time-of-check to
time-of-use) race, which can be fixed once guile has bindings
to openat and friends.

Fixes: &lt;https://lists.gnu.org/archive/html/guix-devel/2021-01/msg00388.html&gt;

* gnu/build/activation.scm: new procedure 'mkdir-p/perms'.
* gnu/services/authentication.scm
  (%nslcd-activation, nslcd-service-type): use new procedure.
* gnu/services/cups.scm (%cups-activation): likewise.
* gnu/services/dbus.scm (dbus-activation): likewise.
* gnu/services/dns.scm (knot-activation): likewise.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Maxime Devos</td></tr>