File CVE-2019-13112.patch of Package exiv2.26639

Index: exiv2-0.23/src/pngchunk.cpp
===================================================================
--- exiv2-0.23.orig/src/pngchunk.cpp
+++ exiv2-0.23/src/pngchunk.cpp
@@ -626,6 +626,10 @@ namespace Exiv2 {
             sp++;
 
         length = (long) atol(sp);
+        const char* eot = (char*)text.pData_ + text.size_;
+        if (length < 0 || length > (eot - sp)/2) {
+            throw Error(14);
+        }
 
         while (*sp != ' ' && *sp != '\n')
             sp++;