[poppler] poppler/XRef.cc

[Albert Astals Cid]

 poppler/XRef.cc |    3 +++
 1 file changed, 3 insertions(+)

New commits:
commit aa39d079dc3b68b0a3512408706d053d664d557d
Author: Albert Astals Cid <aacid at kde.org>
Date:   Thu May 24 12:40:38 2018 +0200

    XRef::readXRefStreamSection: Add integer overflow check
    
    fixes oss-fuzz/8444

diff --git a/poppler/XRef.cc b/poppler/XRef.cc
index 089c2eb2..95d19021 100644
--- a/poppler/XRef.cc
+++ b/poppler/XRef.cc
@@ -789,6 +789,9 @@ GBool XRef::readXRefStreamSection(Stream *xrefStr, int *w, int first, int n) {
   unsigned long long offset, gen;
   int type, c, i, j;
 
+  if (first > INT_MAX - n) {
+    return gFalse;
+  }
   if (first + n < 0) {
     return gFalse;
   }