[PATCH 5/5] libpng: fix CVE-2019-7317

[Ross Burton <ross.burton@intel.com>]

Signed-off-by: Ross Burton <ross.burton@intel.com>
---
 .../libpng/libpng/CVE-2019-7317.patch                | 20 ++++++++++++++++++++
 meta/recipes-multimedia/libpng/libpng_1.6.36.bb      |  3 ++-
 2 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 meta/recipes-multimedia/libpng/libpng/CVE-2019-7317.patch

diff --git a/meta/recipes-multimedia/libpng/libpng/CVE-2019-7317.patch b/meta/recipes-multimedia/libpng/libpng/CVE-2019-7317.patch
new file mode 100644
index 00000000000..6ee1f8da303
--- /dev/null
+++ b/meta/recipes-multimedia/libpng/libpng/CVE-2019-7317.patch
@@ -0,0 +1,20 @@
+Use-after-free detected with static analysis.
+
+CVE: CVE-2019-7317
+Upstream-Status: Submitted [https://github.com/glennrp/libpng/issues/275]
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+diff --git a/png.c b/png.c
+index 9d9926f638..efd1aecfbd 100644
+--- a/png.c
++++ b/png.c
+@@ -4588,8 +4588,7 @@ png_image_free(png_imagep image)
+    if (image != NULL && image->opaque != NULL &&
+       image->opaque->error_buf == NULL)
+    {
+-      /* Ignore errors here: */
+-      (void)png_safe_execute(image, png_image_free_function, image);
++      png_image_free_function(image);
+       image->opaque = NULL;
+    }
+ }
diff --git a/meta/recipes-multimedia/libpng/libpng_1.6.36.bb b/meta/recipes-multimedia/libpng/libpng_1.6.36.bb
index 3cf4f7249cb..a5862378884 100644
--- a/meta/recipes-multimedia/libpng/libpng_1.6.36.bb
+++ b/meta/recipes-multimedia/libpng/libpng_1.6.36.bb
@@ -9,7 +9,8 @@ DEPENDS = "zlib"
 
 LIBV = "16"
 
-SRC_URI = "${SOURCEFORGE_MIRROR}/project/${BPN}/${BPN}${LIBV}/${PV}/${BP}.tar.xz"
+SRC_URI = "${SOURCEFORGE_MIRROR}/project/${BPN}/${BPN}${LIBV}/${PV}/${BP}.tar.xz \
+           file://CVE-2019-7317.patch"
 SRC_URI[md5sum] = "df2be2d29c40937fe1f5349b16bc2826"
 SRC_URI[sha256sum] = "eceb924c1fa6b79172fdfd008d335f0e59172a86a66481e09d4089df872aa319"
 
-- 
2.11.0