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 <[email protected]>
kata-containers · Sep 13, 2018 · 2b89a0a · 2b89a0a
1 parent 7caf1c8
commit 2b89a0a
Showing 1 changed file with 5 additions and 1 deletion.
diff --git 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.