sch_sfb: Fix missing NULL check

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

Signed-off-by: Alan Cox <[email protected]>
Acked-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/net/sched/sch_sfb.c b/net/sched/sch_sfb.c
index 74305c883bd3ee842c535bbc27f003d389207346..30ea4674cabd2a735c47af22239ab006b1c2e826 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);