1 files changed, 33 insertions, 13 deletions

diff --git a/meta/recipes-graphics/cairo/cairo/CVE-2019-6462.patch b/meta/recipes-graphics/cairo/cairo/CVE-2019-6462.patch
index 4e4598c5b5..7c3209291b 100644
--- a/meta/recipes-graphics/cairo/cairo/CVE-2019-6462.patch
+++ b/meta/recipes-graphics/cairo/cairo/CVE-2019-6462.patch
@@ -1,20 +1,40 @@
-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>
+Upstream-Status: Backport
+Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
+
+From ab2c5ee21e5f3d3ee4b3f67cfcd5811a4f99c3a0 Mon Sep 17 00:00:00 2001
+From: Heiko Lewin <hlewin@gmx.de>
+Date: Sun, 1 Aug 2021 11:16:03 +0000
+Subject: [PATCH] _arc_max_angle_for_tolerance_normalized: fix infinite loop
+
+---
+ src/cairo-arc.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
 
 diff --git a/src/cairo-arc.c b/src/cairo-arc.c
-index 390397bae..1bde774a4 100644
+index 390397bae..1c891d1a0 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;
+@@ -90,16 +90,18 @@ _arc_max_angle_for_tolerance_normalized (double tolerance)
+        { M_PI / 11.0,  9.81410988043554039085e-09 },
+     };
+     int table_size = ARRAY_LENGTH (table);
++    const int max_segments = 1000; /* this value is chosen arbitrarily. this gives an error of about 1.74909e-20 */
  
--    assert (angle_max >= angle_min);
-+    if (angle_max < angle_min)
-+       return;
+     for (i = 0; i < table_size; i++)
+        if (table[i].error < tolerance)
+            return table[i].angle;
  
-     if (angle_max - angle_min > 2 * M_PI * MAX_FULL_CIRCLES) {
-        angle_max = fmod (angle_max - angle_min, 2 * M_PI);
+     ++i;
++
+     do {
+        angle = M_PI / i++;
+        error = _arc_error_normalized (angle);
+-    } while (error > tolerance);
++    } while (error > tolerance && i < max_segments);
+ 
+     return angle;
+ }
+-- 
+2.38.1
+