CVE-2018-19539.patch

From: Markus Koschany <apo@debian.org>
Date: Thu, 3 Jan 2019 10:41:52 +0100
Subject: CVE-2018-19539

---
 src/libjasper/base/jas_image.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libjasper/base/jas_image.c b/src/libjasper/base/jas_image.c
index 00f37cd..92777c3 100644
--- a/src/libjasper/base/jas_image.c
+++ b/src/libjasper/base/jas_image.c
@@ -491,6 +491,9 @@ int jas_image_readcmpt(jas_image_t *image, int cmptno, jas_image_coord_t x,
 	  image, cmptno, JAS_CAST(long, x), JAS_CAST(long, y),
 	  JAS_CAST(long, width), JAS_CAST(long, height), data));
 
+	if(data == NULL)
+		return -1;
+
 	if (cmptno < 0 || cmptno >= image->numcmpts_) {
 		return -1;
 	}