sch_sfb: Fix missing NULL check

Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=44461

Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/sch_sfb.c b/net/sched/sch_sfb.c
index 74305c8..30ea467 100644 (file)
--- a/net/sched/sch_sfb.c
+++ b/net/sched/sch_sfb.c
@@ -570,6 +570,8 @@ static int sfb_dump(struct Qdisc *sch, struct sk_buff *skb)
 
        sch->qstats.backlog = q->qdisc->qstats.backlog;
        opts = nla_nest_start(skb, TCA_OPTIONS);
+       if (opts == NULL)
+               goto nla_put_failure;
        if (nla_put(skb, TCA_SFB_PARMS, sizeof(opt), &opt))
                goto nla_put_failure;
        return nla_nest_end(skb, opts);