commit 1aabcfdbaed72d091216579463dfd511ad1a7a3e
author Glenn Randers-Pehrson <glennrp at users.sourceforge.net> Sun Sep 10 05:45:44 2017 -0500
committer Glenn Randers-Pehrson <glennrp at users.sourceforge.net> Sun Sep 10 05:45:44 2017 -0500
tree 36156f194b8f9eada54a4746b75915a376a5db77
parent b5ae93d72e2b9cf6547f2ecfb84550d0e399ade9

[libpng16] Trying to isolate oss-fuzz issue in png_set_text_2().

pngset.c

diff --git a/pngset.c b/pngset.c
index 6d44104..15531bb 100644
--- a/pngset.c
+++ b/pngset.c
@@ -889,7 +889,18 @@
       if (text_ptr[i].text[0] == '\0')
          text_0_is_0=1;
 
-      if (text_is_null || text_0_is_0)
+      if (text_is_null)
+      {
+         text_length = 0;
+#  ifdef PNG_iTXt_SUPPORTED
+         if (text_ptr[i].compression > 0)
+            textp->compression = PNG_ITXT_COMPRESSION_NONE;
+
+         else
+#  endif
+            textp->compression = PNG_TEXT_COMPRESSION_NONE;
+      }
+      else if (text_0_is_0)
       {
          text_length = 0;
 #  ifdef PNG_iTXt_SUPPORTED