From 2b89a0a0d27d6704f78f3720c1a033b9ac2b7e28 Mon Sep 17 00:00:00 2001
From: Peng Tao <bergwolf@gmail.com>
Date: Tue, 11 Sep 2018 15:58:03 +0800
Subject: [PATCH] uevent: fix crash on read errors

The bufio package does not accept negative read count. Upon error,
reset the negative count before returning the result to bufio package.

Fixes: #366

Signed-off-by: Peng Tao <bergwolf@gmail.com>
---
 pkg/uevent/uevent.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkg/uevent/uevent.go b/pkg/uevent/uevent.go
index a0cbc79714..fc2c127469 100644
--- a/pkg/uevent/uevent.go
+++ b/pkg/uevent/uevent.go
@@ -56,7 +56,11 @@ func NewReaderCloser() (io.ReadCloser, error) {
 
 // Read implements reading function for uevent.
 func (r *ReaderCloser) Read(p []byte) (int, error) {
-	return unix.Read(r.fd, p)
+	count, err := unix.Read(r.fd, p)
+	if count < 0 && err != nil {
+		count = 0
+	}
+	return count, err
 }
 
 // Close implements closing function for uevent.