D5640: fuzz: don't allow enormous revlog inputs either
durin42 (Augie Fackler)
phabricator at mercurial-scm.org
Tue Jan 22 17:02:06 UTC 2019
durin42 created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.
REVISION SUMMARY
I'm about to make the fuzzer do more, and without this it was getting
enthusiastic about large (and therefore slow) inputs that I don't
think buy us much.
REPOSITORY
rHG Mercurial
REVISION DETAIL
https://phab.mercurial-scm.org/D5640
AFFECTED FILES
contrib/fuzz/revlog.cc
CHANGE DETAILS
diff --git a/contrib/fuzz/revlog.cc b/contrib/fuzz/revlog.cc
--- a/contrib/fuzz/revlog.cc
+++ b/contrib/fuzz/revlog.cc
@@ -31,6 +31,11 @@
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
{
+ // Don't allow fuzzer inputs larger than 60k, since we'll just bog
+ // down and not accomplish much.
+ if (Size > 60000) {
+ return 0;
+ }
PyObject *text =
PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);
PyObject *locals = PyDict_New();
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Cc: mercurial-devel
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