Fix CVE-2016-5296: Heap-buffer-overflow WRITE in rasterize_edges_1
Adapted for upstream pixman based on:

  https://hg.mozilla.org/releases/mozilla-esr45/rev/5e39c1c2fded

--- pixman-0.34.0/pixman/pixman-edge-imp.h.orig	2015-06-30 05:48:31.000000000 -0400
+++ pixman-0.34.0/pixman/pixman-edge-imp.h	2016-11-16 01:09:34.046335106 -0500
@@ -55,8 +55,9 @@
 	 *
 	 * (The AA case does a similar  adjustment in RENDER_SAMPLES_X)
 	 */
-	lx += X_FRAC_FIRST(1) - pixman_fixed_e;
-	rx += X_FRAC_FIRST(1) - pixman_fixed_e;
+	/* we cast to unsigned to get defined behaviour for overflow */
+	lx = (unsigned)lx + X_FRAC_FIRST(1) - pixman_fixed_e;
+	rx = (unsigned)rx + X_FRAC_FIRST(1) - pixman_fixed_e;
 #endif
 	/* clip X */
 	if (lx < 0)
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<tr><td><span title='2024-03-22 21:59:02 -0400'>2024-03-22</span></td><td><a href='/guix/commit/gnu/packages/aux-files/linux-libre/6.8-x86_64.conf?id=f6f4c71df5558b168fe7a313522af7ea5fe2d0dc'>gnu: Add linux-libre 6.8.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/linux.scm (linux-libre-6.8-version, linux-libre-6.8-gnu-revision,
deblob-scripts-6.8, linux-libre-6.8-pristine-source, linux-libre-6.8-source,
linux-libre-headers-6.8, linux-libre-6.8): New variables.
* gnu/packages/aux-files/linux-libre/6.8-arm.conf,
gnu/packages/aux-files/linux-libre/6.8-arm64.conf,
gnu/packages/aux-files/linux-libre/6.8-i686.conf,
gnu/packages/aux-files/linux-libre/6.8-x86.conf: New files.
* Makefile.am (AUX_FILES): Add them.

Signed-off-by: Leo Famulari &lt;leo@famulari.name&gt;
Change-Id: I338eb725e0b991c67e4d98bd1ef0c441d3d8f0c6
</span></span></td><td>Wilko Meyer</td></tr>