From f21df24616ea611c5d5d0e0e2f8042eb74d5ff48 Mon Sep 17 00:00:00 2001
From: KAMADA Ken'ichi <kamada@nanohz.org>
Date: Mon, 4 Jan 2021 11:06:15 +0900
Subject: [PATCH 1/2] Fix an infinite loop in reading PNG files.

---
 src/util.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/util.rs b/src/util.rs
index e5dd0e4..a4cd6dc 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -56,6 +56,9 @@ impl<T> BufReadExt for T where T: io::BufRead {
     fn discard_exact(&mut self, mut len: usize) -> io::Result<()> {
         while len > 0 {
             let consume_len = match self.fill_buf() {
+                Ok(buf) if buf.is_empty() =>
+                    return Err(io::Error::new(
+                        io::ErrorKind::UnexpectedEof, "unexpected EOF")),
                 Ok(buf) => buf.len().min(len),
                 Err(e) if e.kind() == io::ErrorKind::Interrupted => continue,
                 Err(e) => return Err(e),
@@ -99,6 +102,16 @@ mod tests {
     use std::io::Read;
     use super::*;
 
+    #[test]
+    fn discard_exact() {
+        let mut buf = b"abc".as_ref();
+        buf.discard_exact(1).unwrap();
+        assert_eq!(buf, b"bc");
+        buf.discard_exact(2).unwrap();
+        assert_eq!(buf, b"");
+        buf.discard_exact(1).unwrap_err();
+    }
+
     #[test]
     fn read8_len() {
         let mut reader = Cursor::new([]);

From 7c643da1972b30dc70b31b4c10c5ed0444e36d53 Mon Sep 17 00:00:00 2001
From: KAMADA Ken'ichi <kamada@nanohz.org>
Date: Tue, 5 Jan 2021 17:49:15 +0900
Subject: [PATCH 2/2] Increment the version to 0.5.3.

---
 Cargo.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index e761db1..e0f8e89 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "exif"
-version = "0.5.2"
+version = "0.5.3"
 authors = ["KAMADA Ken'ichi <kamada@nanohz.org>"]
 edition = "2018"