[libpng16] Nullify all pointers in PNG_CLEANUP of libpng_read_fuzzer.cc
diff --git a/contrib/oss-fuzz/libpng_read_fuzzer.cc b/contrib/oss-fuzz/libpng_read_fuzzer.cc
index bcef68c..1445f81 100644
--- a/contrib/oss-fuzz/libpng_read_fuzzer.cc
+++ b/contrib/oss-fuzz/libpng_read_fuzzer.cc
@@ -92,7 +92,11 @@
nullptr); \
else \
png_destroy_read_struct(&png_handler.png_ptr, nullptr, nullptr); \
- }
+ png_handler.png_ptr = nullptr; \
+ png_handler.row_ptr = nullptr; \
+ png_handler.info_ptr = nullptr; \
+ png_handler.end_info_ptr = nullptr;
+ }
png_handler.info_ptr = png_create_info_struct(png_handler.png_ptr);
if (!png_handler.info_ptr) {