commit b440777fde3300145493ca117c556409db7261c0
author Lei Zhang <thestig@chromium.org> Wed Jan 16 19:30:47 2019 +0000
committer Chromium commit bot <commit-bot@chromium.org> Wed Jan 16 19:30:47 2019 +0000
tree e1cf0dea95ec30cac947d521202d66514b6bde23
parent 9c950b158ab08a20835a7db77f55be27b4299804

Limit pdf_cmap_fuzzer input to 256 KB.

Larger inputs are unlikely to do anything interesting with
CPDF_CMap::LoadEmbedded().

BUG=chromium:921373

Change-Id: I51adc25a316d5d8828418e3325bd37be3ec71395
Reviewed-on: https://pdfium-review.googlesource.com/c/48350
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

testing/fuzzers/pdf_cmap_fuzzer.cc

diff --git a/testing/fuzzers/pdf_cmap_fuzzer.cc b/testing/fuzzers/pdf_cmap_fuzzer.cc
index 7d35fd0..c827b7c 100644
--- a/testing/fuzzers/pdf_cmap_fuzzer.cc
+++ b/testing/fuzzers/pdf_cmap_fuzzer.cc
@@ -8,6 +8,9 @@
 #include "third_party/base/span.h"
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size > 256 * 1024)
+    return 0;
+
   pdfium::MakeRetain<CPDF_CMap>()->LoadEmbedded(pdfium::make_span(data, size));
   return 0;
 }