pkt_sched: fix missing check for packet overrun in qdisc_dump_stab()
nla_nest_start() might return NULL, causing a NULL pointer dereference.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index b16ad29..6ab4a2f 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -417,6 +417,8 @@
struct nlattr *nest;
nest = nla_nest_start(skb, TCA_STAB);
+ if (nest == NULL)
+ goto nla_put_failure;
NLA_PUT(skb, TCA_STAB_BASE, sizeof(stab->szopts), &stab->szopts);
nla_nest_end(skb, nest);