Copied from Debian.

From: Carlos Garcia Campos <cgarcia@igalia.com>
Date: Mon, 19 Nov 2018 12:33:07 +0100
Subject: ft: Use FT_Done_MM_Var instead of free when available in
 cairo_ft_apply_variations

Fixes a crash when using freetype >= 2.9

[This is considered to be security-sensitive because WebKitGTK+ sets its
own memory allocator, which is not compatible with system free(), making
this a remotely triggerable denial of service or memory corruption.]

Origin: upstream, commit:90e85c2493fdfa3551f202ff10282463f1e36645
Bug: https://gitlab.freedesktop.org/cairo/cairo/merge_requests/5
Bug-Debian: https://bugs.debian.org/916389
Bug-CVE: CVE-2018-19876
---
 src/cairo-ft-font.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/cairo-ft-font.c b/src/cairo-ft-font.c
index 325dd61..981973f 100644
--- a/src/cairo-ft-font.c
+++ b/src/cairo-ft-font.c
@@ -2393,7 +2393,11 @@ skip:
 done:
         free (coords);
         free (current_coords);
+#if HAVE_FT_DONE_MM_VAR
+        FT_Done_MM_Var (face->glyph->library, ft_mm_var);
+#else
         free (ft_mm_var);
+#endif
     }
 }
 
href='/guix/refs/?id=19a651cbffcf8602a6a1d5c4669f85f72406dc9a'>refs</a><a class='active' href='/guix/log/gnu/services/linux.scm'>log</a><a href='/guix/tree/gnu/services/linux.scm?id=19a651cbffcf8602a6a1d5c4669f85f72406dc9a'>tree</a><a href='/guix/commit/gnu/services/linux.scm?id=19a651cbffcf8602a6a1d5c4669f85f72406dc9a'>commit</a><a href='/guix/diff/gnu/services/linux.scm?id=19a651cbffcf8602a6a1d5c4669f85f72406dc9a'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/services/linux.scm'>
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<div class='path'>path: <a href='/guix/log/?id=19a651cbffcf8602a6a1d5c4669f85f72406dc9a'>root</a>/<a href='/guix/log/gnu?id=19a651cbffcf8602a6a1d5c4669f85f72406dc9a'>gnu</a>/<a href='/guix/log/gnu/services?id=19a651cbffcf8602a6a1d5c4669f85f72406dc9a'>services</a>/<a href='/guix/log/gnu/services/linux.scm?id=19a651cbffcf8602a6a1d5c4669f85f72406dc9a'>linux.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/linux.scm?id=19a651cbffcf8602a6a1d5c4669f85f72406dc9a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-04-12 18:24:27 +0000'>2020-04-12</span></td><td><a href='/guix/commit/gnu/services/linux.scm?id=8e4d1493f1d56e29252eb7a36b3eee2a0e073ee4'>services: kernel-module-loader: Clean up.</a><span class='msg-avail'>...<span class='msg-tooltip'>Suggested by Efraim Flashner &lt;efraim@flashner.co.il&gt;.
See &lt;https://lists.gnu.org/archive/html/bug-guix/2020-04/msg00237.html&gt;.

* gnu/services/linux.scm (kernel-module-loader-shepherd-service):
Remove unneeded 'respawn?' field.
</span></span></td><td>Florian Pelz</td></tr>
<tr><td><span title='2020-04-05 13:07:13 +0200'>2020-04-05</span></td><td><a href='/guix/commit/gnu/services/linux.scm?id=044d1478c9a63a64547c9cc320008f8d8fbf6791'>gnu: Add kernel-module-loader-service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/guix.texi (Linux Services): Add a new subsection and document the
new service and its configuration.
* gnu/services/linux.scm (kernel-module-loader-service-type): New type.
(kernel-module-loader-shepherd-service): New procedure.
* gnu/tests/linux-modules.scm (module-loader-program): Procedure
removed.
(modules-loaded?-program): New procedure.
(run-loadable-kernel-modules-test): 'module-loader-program' procedure
replaced by the new one.
[os]: Use 'kernel-module-loader-service'.

Signed-off-by: Danny Milosavljevic &lt;dannym@scratchpost.org&gt;
</span></span></td><td>Brice Waegeneire</td></tr>
<tr><td><span title='2020-01-31 23:37:13 -0500'>2020-01-31</span></td><td><a href='/guix/commit/gnu/services/linux.scm?id=d3e439e355284f136ff13eb3e6fffb4661552f3b'>gnu: Add earlyoom-service-type.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/linux.scm: New file.
* tests/services/linux.scm: Add test.
* Makefile.am (SCM_TESTS): Register test.
* doc/guix.texi (Linux Services): Add a new section and document the new
service and its configuration.
</span></span></td><td>Maxim Cournoyer</td></tr>