[poppler] poppler/Gfx.cc

[GitLab Mirror]

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

New commits:
commit 6e7cbc713ae584d195f77845d6cafcdc80fb64ab
Author: Albert Astals Cid <aacid at kde.org>
Date:   Sat Dec 22 11:11:59 2018 +0100

    Gfx::doTilingPatternFill: Fix undefined behaviour
    
    oss-fuzz/8548

diff --git a/poppler/Gfx.cc b/poppler/Gfx.cc
index 2b53ea07..8dc2dc93 100644
--- a/poppler/Gfx.cc
+++ b/poppler/Gfx.cc
@@ -2187,6 +2187,9 @@ void Gfx::doTilingPatternFill(GfxTilingPattern *tPat,
   //~ edge instead of left/bottom (?)
   xstep = fabs(tPat->getXStep());
   ystep = fabs(tPat->getYStep());
+  if (unlikely(xstep == 0 || ystep == 0)) {
+      goto restore;
+  }
   if (tPat->getBBox()[0] < tPat->getBBox()[2]) {
     xi0 = (int)ceil((xMin - tPat->getBBox()[2]) / xstep);
     xi1 = (int)floor((xMax - tPat->getBBox()[0]) / xstep) + 1;