[libpng16] Initialize entire palette array to zero in png_handle_PLTE().

ANNOUNCE

-Libpng 1.6.35beta01 - October 16, 2017
+Libpng 1.6.35beta01 - October 17, 2017
 
 This is not intended to be a public release. It will be replaced
 within a few weeks by a public version or by another test version.
@@ -24,12 +24,12 @@ Other information:
 
 Changes since the last public release (1.6.34):
 
-Version 1.6.35beta01 [October 16, 2017]
+Version 1.6.35beta01 [October 17, 2017]
   Restored 21 of the contrib/pngsuite/i*.png, which do not cause test
     failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
   Added calls to png_set_*() transforms commonly used by browsers to
     the fuzzer.
-  Do not enable tRNS having trans_color with out-of-range value.
+  Initialize entire palette array to zero in png_handle_PLTE().
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

CHANGES

@@ -6040,12 +6040,12 @@ Version 1.6.33 [September 28, 2017]
 Version 1.6.34 [September 29, 2017]
   Removed contrib/pngsuite/i*.png; some of caused test failures.
 
-Version 1.6.35beta01 [October 16, 2017]
+Version 1.6.35beta01 [October 17, 2017]
   Restored 21 of the contrib/pngsuite/i*.png, which do not cause test
     failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
   Added calls to png_set_*() transforms commonly used by browsers to
     the fuzzer.
-  Do not enable tRNS having trans_color with out-of-range value.
+  Initialize entire palette array to zero in png_handle_PLTE().
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

pngrutil.c

 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.6.33 [September 28, 2017]
+ * Last changed in libpng 1.6.35 [(PENDING RELEASE)]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -912,7 +912,7 @@ png_handle_IHDR(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
 void /* PRIVATE */
 png_handle_PLTE(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
 {
-   png_color palette[PNG_MAX_PALETTE_LENGTH];
+   png_color palette[PNG_MAX_PALETTE_LENGTH] = {0};
    int max_palette_length, num, i;
 #ifdef PNG_POINTER_INDEXING_SUPPORTED
    png_colorp pal_ptr;

pngset.c

 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.6.35 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.32 [August 24, 2017]
  * Copyright (c) 1998-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -1025,6 +1025,7 @@ png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr,
 
    if (trans_color != NULL)
    {
+#ifdef PNG_WARNINGS_SUPPORTED
       if (info_ptr->bit_depth < 16)
       {
          int sample_max = (1 << info_ptr->bit_depth) - 1;
@@ -1038,6 +1039,7 @@ png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr,
             png_warning(png_ptr,
                 "tRNS chunk has out-of-range samples for bit_depth");
       }
+#endif
 
       info_ptr->trans_color = *trans_color;