[libfuzzer] Add custom max_len parameter for boringssl fuzzers.

third_party/boringssl/BUILD.gn

Index: third_party/boringssl/BUILD.gn
diff --git a/third_party/boringssl/BUILD.gn b/third_party/boringssl/BUILD.gn
index d4f00cfe726d3fbcbb0f3b8a0dddc1604ee5dfce..9e58dbe62b4a958219537a4f5ab25b863f1d4ef2 100644
--- a/third_party/boringssl/BUILD.gn
+++ b/third_party/boringssl/BUILD.gn
@@ -178,6 +178,16 @@ if (build_with_chromium) {
         ":boringssl_fuzzer",
       ]
       seed_corpus = "src/fuzz/${fuzzer}_corpus"
+
+      if ("cert" == fuzzer) {
+        libfuzzer_options = [ "max_len=3072" ]
+      } else if ("client" == fuzzer) {
+        libfuzzer_options = [ "max_len=20000" ]
+      } else if ("privkey" == fuzzer) {
+        libfuzzer_options = [ "max_len=2048" ]
+      } else if ("server" == fuzzer) {
+        libfuzzer_options = [ "max_len=4096" ]

[davidben, 2016/04/27 18:06:22]

Oof. Sorry, I completely forgot this was in the pipeline when I made this a
foreach. In a follow-up, I'll see about making these definitions live in the
BoringSSL repository somewhere.

+      }
     }
   }
 }