diff -up util-linux-2.23.2/sys-utils/flock.c.kzak util-linux-2.23.2/sys-utils/flock.c

--- util-linux-2.23.2/sys-utils/flock.c.kzak	2014-03-25 12:00:53.735361387 +0100

+++ util-linux-2.23.2/sys-utils/flock.c	2014-03-25 12:01:44.534886083 +0100

@@ -250,6 +250,7 @@ int main(int argc, char *argv[])

 			/* otherwise try again */

 			continue;

 		case EIO:

+		case EBADF:		/* since Linux 3.4 (commit 55725513) */

 			/* Probably NFSv4 where flock() is emulated by fcntl().

 			 * Let's try to reopen in read-write mode.

 			 */