cairo: fix CVE-2018-19876 CVE-2019-6461 CVE-2019-6462

CVE-2018-19876 is a backport from upstream.

CVE-2019-6461 and CVE-2019-6462 are patches taken from Clear Linux.

(From OE-Core rev: 078e4d5c2114d942806cd0d5ad501805a011e841)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/cairo/cairo/CVE-2018-19876.patch

@@ -0,0 +1,34 @@
+CVE: CVE-2018-19876
+Upstream-Status: Backport
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+From 90e85c2493fdfa3551f202ff10282463f1e36645 Mon Sep 17 00:00:00 2001
+From: Carlos Garcia Campos <cgarcia@igalia.com>
+Date: Mon, 19 Nov 2018 12:33:07 +0100
+Subject: [PATCH] ft: Use FT_Done_MM_Var instead of free when available in
+ cairo_ft_apply_variations
+
+Fixes a crash when using freetype >= 2.9
+---
+ 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 325dd61b4..981973f78 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
+     }
+ }
+ 
+-- 
+2.11.0
+

meta/recipes-graphics/cairo/cairo/CVE-2019-6461.patch

@@ -0,0 +1,19 @@
+There is a potential infinite-loop in function _arc_error_normalized().
+
+CVE: CVE-2019-6461
+Upstream-Status: Pending
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+diff --git a/src/cairo-arc.c b/src/cairo-arc.c
+index 390397bae..f9249dbeb 100644
+--- a/src/cairo-arc.c
++++ b/src/cairo-arc.c
+@@ -99,7 +99,7 @@ _arc_max_angle_for_tolerance_normalized (double tolerance)
+     do {
+ 	angle = M_PI / i++;
+ 	error = _arc_error_normalized (angle);
+-    } while (error > tolerance);
++    } while (error > tolerance && error > __DBL_EPSILON__);
+ 
+     return angle;
+ }

meta/recipes-graphics/cairo/cairo/CVE-2019-6462.patch

@@ -0,0 +1,20 @@
+There is an assertion in function _cairo_arc_in_direction().
+
+CVE: CVE-2019-6462
+Upstream-Status: Pending
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+diff --git a/src/cairo-arc.c b/src/cairo-arc.c
+index 390397bae..1bde774a4 100644
+--- a/src/cairo-arc.c
++++ b/src/cairo-arc.c
+@@ -186,7 +186,8 @@ _cairo_arc_in_direction (cairo_t	  *cr,
+     if (cairo_status (cr))
+         return;
+ 
+-    assert (angle_max >= angle_min);
++    if (angle_max < angle_min)
++       return;
+ 
+     if (angle_max - angle_min > 2 * M_PI * MAX_FULL_CIRCLES) {
+ 	angle_max = fmod (angle_max - angle_min, 2 * M_PI);

meta/recipes-graphics/cairo/cairo_1.16.0.bb

@@ -24,6 +24,9 @@ DEPENDS = "fontconfig glib-2.0 libpng pixman zlib"
 
 SRC_URI = "http://cairographics.org/releases/cairo-${PV}.tar.xz \
            file://cairo-get_bitmap_surface-bsc1036789-CVE-2017-7475.diff \ 
+           file://CVE-2018-19876.patch \
+           file://CVE-2019-6461.patch \
+           file://CVE-2019-6462.patch \
           "
 
 SRC_URI[md5sum] = "f19e0353828269c22bd72e271243a552"