From 0ba7eeef2ea36b4e4ed5d79e85f566dd459ad9b1 Mon Sep 17 00:00:00 2001
From: Google AutoFuzz Team <security-tps@google.com>
Date: Mon, 18 Jan 2021 22:17:06 +0100
Subject: [PATCH] Add a check to prevent cairo from immediately crashing
 (#4992)

---
 projects/cairo/targets/pdf_surface_fuzzer.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/projects/cairo/targets/pdf_surface_fuzzer.c b/projects/cairo/targets/pdf_surface_fuzzer.c
index 7869f6371..7967d1d32 100644
--- a/projects/cairo/targets/pdf_surface_fuzzer.c
+++ b/projects/cairo/targets/pdf_surface_fuzzer.c
@@ -26,6 +26,10 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     cairo_surface_t *surface;
     cairo_status_t status;
 
+    if (size == 0) {
+        return 0;
+    }
+
     char *tmpfile = fuzzer_get_tmpfile(data, size);
     surface = cairo_pdf_surface_create(tmpfile, width_in_points, height_in_points);
     status = cairo_surface_status(surface);