From owner-svn-src-stable-10@freebsd.org Wed Jun 29 10:40:36 2016 Return-Path: Delivered-To: svn-src-stable-10@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 52CB2B84A50; Wed, 29 Jun 2016 10:40:36 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 09FC72B47; Wed, 29 Jun 2016 10:40:35 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u5TAeZtk057866; Wed, 29 Jun 2016 10:40:35 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u5TAeZPC057864; Wed, 29 Jun 2016 10:40:35 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <201606291040.u5TAeZPC057864@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Wed, 29 Jun 2016 10:40:35 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r302271 - stable/10/sys/ofed/include/linux X-SVN-Group: stable-10 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-10@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: SVN commit messages for only the 10-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 Jun 2016 10:40:36 -0000 Author: hselasky Date: Wed Jun 29 10:40:34 2016 New Revision: 302271 URL: https://svnweb.freebsd.org/changeset/base/302271 Log: MFC r301544: Fallback to arc4rand() in the LinuxKPI when read_random() returns zero. This can happen for virtual machines. Sponsored by: Mellanox Technologies Modified: stable/10/sys/ofed/include/linux/etherdevice.h stable/10/sys/ofed/include/linux/random.h Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/ofed/include/linux/etherdevice.h ============================================================================== --- stable/10/sys/ofed/include/linux/etherdevice.h Wed Jun 29 10:33:11 2016 (r302270) +++ stable/10/sys/ofed/include/linux/etherdevice.h Wed Jun 29 10:40:34 2016 (r302271) @@ -137,7 +137,8 @@ eth_broadcast_addr(u8 *pa) static inline void random_ether_addr(u8 * dst) { - read_random(dst, 6); + if (read_random(dst, 6) == 0) + arc4rand(dst, 6, 0); dst[0] &= 0xfe; dst[0] |= 0x02; Modified: stable/10/sys/ofed/include/linux/random.h ============================================================================== --- stable/10/sys/ofed/include/linux/random.h Wed Jun 29 10:33:11 2016 (r302270) +++ stable/10/sys/ofed/include/linux/random.h Wed Jun 29 10:40:34 2016 (r302271) @@ -2,7 +2,7 @@ * Copyright (c) 2010 Isilon Systems, Inc. * Copyright (c) 2010 iX Systems, Inc. * Copyright (c) 2010 Panasas, Inc. - * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. + * Copyright (c) 2013-2016 Mellanox Technologies, Ltd. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -31,11 +31,13 @@ #define _LINUX_RANDOM_H_ #include +#include static inline void get_random_bytes(void *buf, int nbytes) { - read_random(buf, nbytes); + if (read_random(buf, nbytes) == 0) + arc4rand(buf, nbytes, 0); } #endif /* _LINUX_RANDOM_H_ */