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mqprio: Avoid panic if no options are provided

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[ Upstream commit 7838f2ce36 ]

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 <tgraf@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Thomas Graf 2011-12-22 02:05:07 +00:00 • committed by Greg Kroah-Hartman
commit 477a897533
1 changed files with 1 additions and 1 deletions
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2
net/sched/sch_mqprio.c
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@ -106,7 +106,7 @@ static int mqprio_init(struct Qdisc *sch, struct nlattr *opt)
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);