From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120103223035.877295883@clark.kroah.org> Date: Tue, 03 Jan 2012 14:30:12 -0800 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Thomas Graf , "David S. Miller" Subject: [54/67] mqprio: Avoid panic if no options are provided In-Reply-To: <20120103223043.GA26738@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Graf [ Upstream commit 7838f2ce36b6ab5c13ef20b1857e3bbd567f1759 ] Userspace may not provide TCA_OPTIONS, in fact tc currently does so not do so if no arguments are specified on the command line. Return EINVAL instead of panicing. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/sched/sch_mqprio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/sched/sch_mqprio.c +++ b/net/sched/sch_mqprio.c @@ -106,7 +106,7 @@ static int mqprio_init(struct Qdisc *sch if (!netif_is_multiqueue(dev)) return -EOPNOTSUPP; - if (nla_len(opt) < sizeof(*qopt)) + if (!opt || nla_len(opt) < sizeof(*qopt)) return -EINVAL; qopt = nla_data(opt);