From 25ccd7f49dd371009d6f843635447b9285deb852 Mon Sep 17 00:00:00 2001
From: Junfeng Liu <china.liujunfeng@gmail.com>
Date: Wed, 1 Dec 2021 00:01:59 +0800
Subject: [PATCH] Check stream length

---
 src/document.rs | 4 ++--
 src/parser.rs   | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/document.rs b/src/document.rs
index abd298b..a8b10d1 100644
--- a/src/document.rs
+++ b/src/document.rs
@@ -263,7 +263,7 @@ impl Document {
             {
                 collect_resources(page_tree, resource_ids, doc);
             }
-        };
+        }
 
         let mut resource_dict = None;
         let mut resource_ids = Vec::new();
@@ -291,7 +291,7 @@ impl Document {
                     }
                 }
             }
-        };
+        }
 
         let mut fonts = BTreeMap::new();
         let (resource_dict, resource_ids) = self.get_page_resources(page_id);
diff --git a/src/parser.rs b/src/parser.rs
index af1fc6d..58d1f72 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -134,6 +134,7 @@ fn stream<'a>(reader: &'a Reader) -> Parser<'a, u8, Stream> {
                 }
                 value.as_i64()
             }) {
+                assert!(length >= 0, "invalid negative stream length");
                 let stream = take(length as usize) - eol().opt() - seq(b"endstream").expect("endstream");
                 stream.map(move |data| Stream::new(dict.clone(), data.to_vec()))
             } else {