[poppler] poppler/XRef.cc

[Albert Astals Cid]

 poppler/XRef.cc |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

New commits:
commit a7154bcc6aba5429dc6cc024bd90dae2f1d2d0c1
Author: Albert Astals Cid <aacid at kde.org>
Date:   Fri May 25 16:21:45 2018 +0200

    XRef::readXRefTable: Rewrite overflow check
    
    In a way that it doesn't depend on undefined behaviour
    
    fixes oss-fuzz/8528

diff --git a/poppler/XRef.cc b/poppler/XRef.cc
index 95d19021..6afb51a0 100644
--- a/poppler/XRef.cc
+++ b/poppler/XRef.cc
@@ -574,7 +574,7 @@ GBool XRef::readXRefTable(Parser *parser, Goffset *pos, std::vector<Goffset> *fo
       goto err0;
     }
     n = obj.getInt();
-    if (first < 0 || n < 0 || first + n < 0) {
+    if (first < 0 || n < 0 || first > INT_MAX - n) {
       goto err0;
     }
     if (first + n > size) {