sch_sfb: Fix missing NULL check

BugLink: http://bugs.launchpad.net/bugs/1034988

[ Upstream commit 7ac2908e4b2edaec60e9090ddb4d9ceb76c05e7d ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/sched/sch_sfb.c b/net/sched/sch_sfb.c
index 47ee29fad35..e85b248773e 100644
--- a/net/sched/sch_sfb.c
+++ b/net/sched/sch_sfb.c
@@ -556,6 +556,8 @@ 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;
         NLA_PUT(skb, TCA_SFB_PARMS, sizeof(opt), &opt);
         return nla_nest_end(skb, opts);