From 6ccfa3e75ee2abe34061c8d72184d00ce3f1e554 Mon Sep 17 00:00:00 2001
From: Brendan Coles <bcoles@gmail.com>
Date: Sat, 30 Oct 2021 11:08:57 +0000
Subject: [PATCH] LibPDF: Parser::parse_header() return false if remaining
 bytes is zero

---
 Userland/Libraries/LibPDF/Parser.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Userland/Libraries/LibPDF/Parser.cpp b/Userland/Libraries/LibPDF/Parser.cpp
index 2242ac61ac..1872c0e9b8 100644
--- a/Userland/Libraries/LibPDF/Parser.cpp
+++ b/Userland/Libraries/LibPDF/Parser.cpp
@@ -91,6 +91,8 @@ bool Parser::parse_header()
 {
     // FIXME: Do something with the version?
     m_reader.set_reading_forwards();
+    if (m_reader.remaining() == 0)
+        return false;
     m_reader.move_to(0);
     if (m_reader.remaining() < 8 || !m_reader.matches("%PDF-"))
         return false;