From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Duyck Subject: [net-2.6 PATCH] ethtool: prevent null pointer dereference with NTUPLE set but no set_rx_ntuple Date: Fri, 25 Feb 2011 16:42:20 -0800 Message-ID: <20110226004220.8793.65076.stgit@gitlad.jf.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, stable@kernel.org To: davem@davemloft.net, jeffrey.t.kirsher@intel.com, bhutchings@solarflare.com Return-path: Received: from mga03.intel.com ([143.182.124.21]:9145 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756506Ab1BZAmV (ORCPT ); Fri, 25 Feb 2011 19:42:21 -0500 Sender: netdev-owner@vger.kernel.org List-ID: This change is meant to prevent a possible null pointer dereference if NETIF_F_NTUPLE is defined but the set_rx_ntuple function pointer is not. This issue appears to affect all kernels since 2.6.34. Signed-off-by: Alexander Duyck --- net/core/ethtool.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/net/core/ethtool.c b/net/core/ethtool.c index c1a71bb..4843674 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -893,6 +893,9 @@ static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev, struct ethtool_rx_ntuple_flow_spec_container *fsc = NULL; int ret; + if (!ops->set_rx_ntuple) + return -EOPNOTSUPP; + if (!(dev->features & NETIF_F_NTUPLE)) return -EINVAL;