From 3b542021e471c2927e5225fa0680be4dbbc1da60 Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Mon, 11 Jan 2021 15:44:42 +0100
Subject: [PATCH] Fuzzer: Gracefully handle hashes that cannot be serialized

---
 sapi/fuzzer/generate_unserializehash_corpus.php | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sapi/fuzzer/generate_unserializehash_corpus.php b/sapi/fuzzer/generate_unserializehash_corpus.php
index 04c6ea14287..c7c59254280 100644
--- a/sapi/fuzzer/generate_unserializehash_corpus.php
+++ b/sapi/fuzzer/generate_unserializehash_corpus.php
@@ -6,5 +6,11 @@ $corpusDir = __DIR__ . '/corpus/unserializehash';
 foreach (hash_algos() as $algo) {
     $ctx = hash_init($algo);
     $algx = preg_replace('/[^-_a-zA-Z0-9]/', '_', $algo);
-    file_put_contents($corpusDir . '/' . $algx, "x|" . serialize($ctx));
+    try {
+        $serialized = serialize($ctx);
+    } catch (Exception $e) {
+        echo "Hash algorithm $algo could not be serialized.\n";
+        continue;
+    }
+    file_put_contents($corpusDir . '/' . $algx, "x|" . $serialized);
 }