# HG changeset patch
# User Augie Fackler <raf@durin42.com>
# Date 2019-01-22 16:41:09
# Node ID 44cd432aed9f8f75e62a7aeb5c0a116f972b3088
# Parent  ebe51a2e75be64f23c459f51be28d707750aeb32

fuzz: restrict manifest input size

Again, let's keep the fuzzer from getting excited about huge inputs.

Differential Revision: https://phab.mercurial-scm.org/D5642

diff --git a/contrib/fuzz/manifest.cc b/contrib/fuzz/manifest.cc
--- a/contrib/fuzz/manifest.cc
+++ b/contrib/fuzz/manifest.cc
@@ -39,6 +39,11 @@ except Exception as e:
 
 int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
 {
+	// Don't allow fuzzer inputs larger than 100k, since we'll just bog
+	// down and not accomplish much.
+	if (Size > 100000) {
+		return 0;
+	}
 	PyObject *mtext =
 	    PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);
 	PyObject *locals = PyDict_New();