From: Jamal Hadi Salim jhs@mojatatu.com
[ Upstream commit a2965c7be0522eaa18808684b7b82b248515511b ]
If asked to drop a packet via TC_ACT_SHOT it is unsafe to assume res.class contains a valid pointer Fixes: b0188d4dbe5f ("[NET_SCHED]: sch_atm: Lindent")
Signed-off-by: Jamal Hadi Salim jhs@mojatatu.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/sched/sch_atm.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c index 70fe1c5e44ad..33737169cc2d 100644 --- a/net/sched/sch_atm.c +++ b/net/sched/sch_atm.c @@ -397,10 +397,13 @@ static int atm_tc_enqueue(struct sk_buff *skb, struct Qdisc *sch, result = tcf_classify(skb, NULL, fl, &res, true); if (result < 0) continue; + if (result == TC_ACT_SHOT) + goto done; + flow = (struct atm_flow_data *)res.class; if (!flow) flow = lookup_flow(sch, res.classid); - goto done; + goto drop; } } flow = NULL;