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

Source: OpenEmbedded.org
MR: 97538, 97543
Type: Security Fix
Disposition: Backport from https://git.openembedded.org/openembedded-core/commit/meta/recipes-graphics/cairo?h=warrior&id=078e4d5c2114d942806cd0d5ad501805a011e841
ChangeID: fa8bdd44ad8613bb0679a1f6d9d670c3b47a0677
Description:

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: 8b5e68afc9767d8b6b966503e9353cadafae9bfb)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
[Dropped CVE-2018-19876, not affected]
Issue was introduced in 1.15.8 by:
commit 721b7ea0a785afaa04b6da63f970c3c57666fdfe

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 39 insertions, 0 deletions

diff --git a/meta/recipes-graphics/cairo/cairo/CVE-2019-6461.patch b/meta/recipes-graphics/cairo/cairo/CVE-2019-6461.patch
new file mode 100644
index 0000000000..5232cf70c6
--- /dev/null
+++ b/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;
+ }
diff --git a/meta/recipes-graphics/cairo/cairo/CVE-2019-6462.patch b/meta/recipes-graphics/cairo/cairo/CVE-2019-6462.patch
new file mode 100644
index 0000000000..4e4598c5b5
--- /dev/null
+++ b/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);