[poppler] poppler/JBIG2Stream.cc

[GitLab Mirror]

 poppler/JBIG2Stream.cc |    3 +++
 1 file changed, 3 insertions(+)

New commits:
commit 27672cc02a6dd07849bf83a298597e083831ec49
Author: Albert Astals Cid <aacid at kde.org>
Date:   Wed May 4 23:25:49 2022 +0200

    JBIGStream: Fix unint memory read on broken files
    
    oss-fuzz/47224

diff --git a/poppler/JBIG2Stream.cc b/poppler/JBIG2Stream.cc
index 57e1e3a8..47889ed5 100644
--- a/poppler/JBIG2Stream.cc
+++ b/poppler/JBIG2Stream.cc
@@ -688,6 +688,9 @@ JBIG2Bitmap *JBIG2Bitmap::getSlice(unsigned int x, unsigned int y, unsigned int
 
 void JBIG2Bitmap::expand(int newH, unsigned int pixel)
 {
+    if (unlikely(!data)) {
+        return;
+    }
     if (newH <= h || line <= 0 || newH >= (INT_MAX - 1) / line) {
         error(errSyntaxError, -1, "invalid width/height");
         gfree(data);