From ec2507d2a3060a970fa314556891828cfd60093e Mon Sep 17 00:00:00 2001 From: Yotam Gigi Date: Tue, 3 Jan 2017 19:20:24 +0200 Subject: [PATCH] net/sched: cls_matchall: Fix error path Fix several error paths in matchall: - Release reference to actions in case the hardware fails offloading (relevant to skip_sw only) - Fix error path in case tcf_exts initialization/validation fail Fixes: bf3994d2ed31 ("net/sched: introduce Match-all classifier") Signed-off-by: Yotam Gigi Signed-off-by: David S. Miller --- net/sched/cls_matchall.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c index f935429bd5ef..fcecf5aac666 100644 --- a/net/sched/cls_matchall.c +++ b/net/sched/cls_matchall.c @@ -141,10 +141,12 @@ static int mall_set_parms(struct net *net, struct tcf_proto *tp, struct tcf_exts e; int err; - tcf_exts_init(&e, TCA_MATCHALL_ACT, 0); + err = tcf_exts_init(&e, TCA_MATCHALL_ACT, 0); + if (err) + return err; err = tcf_exts_validate(net, tp, tb, est, &e, ovr); if (err < 0) - return err; + goto errout; if (tb[TCA_MATCHALL_CLASSID]) { f->res.classid = nla_get_u32(tb[TCA_MATCHALL_CLASSID]); @@ -154,6 +156,9 @@ static int mall_set_parms(struct net *net, struct tcf_proto *tp, tcf_exts_change(tp, &f->exts, &e); return 0; +errout: + tcf_exts_destroy(&e); + return err; } static int mall_change(struct net *net, struct sk_buff *in_skb, @@ -193,7 +198,9 @@ static int mall_change(struct net *net, struct sk_buff *in_skb, if (!f) return -ENOBUFS; - tcf_exts_init(&f->exts, TCA_MATCHALL_ACT, 0); + err = tcf_exts_init(&f->exts, TCA_MATCHALL_ACT, 0); + if (err) + goto err_exts_init; if (!handle) handle = 1; @@ -202,13 +209,13 @@ static int mall_change(struct net *net, struct sk_buff *in_skb, err = mall_set_parms(net, tp, f, base, tb, tca[TCA_RATE], ovr); if (err) - goto errout; + goto err_set_parms; if (tc_should_offload(dev, tp, flags)) { err = mall_replace_hw_filter(tp, f, (unsigned long) f); if (err) { if (tc_skip_sw(flags)) - goto errout; + goto err_replace_hw_filter; else err = 0; } @@ -219,7 +226,10 @@ static int mall_change(struct net *net, struct sk_buff *in_skb, return 0; -errout: +err_replace_hw_filter: +err_set_parms: + tcf_exts_destroy(&f->exts); +err_exts_init: kfree(f); return err; } -- 2.30.2