merge #4923 into opencontainers/runc:release-1.4

Joshua Rogers (1):
  fix(seccompagent): close received FDs, not loop index

LGTMs: lifubang cyphar

tests/cmd/seccompagent/seccompagent.go

@@ -27,8 +27,8 @@ var (
 )
 
 func closeStateFds(recvFds []int) {
-	for i := range recvFds {
-		unix.Close(i)
+	for _, fd := range recvFds {
+		_ = unix.Close(fd)
 	}
 }