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net_sched: properly handle failure case of tcf_exts_init()

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After commit 22dc13c837 ("net_sched: convert tcf_exts from list to pointer array")
we do dynamic allocation in tcf_exts_init(), therefore we need
to handle the ENOMEM case properly.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
WANG Cong 2016-08-19 12:36:54 -07:00 committed by David S. Miller
parent c1346a7e70
commit b9a24bb76b
11 changed files with 182 additions and 75 deletions
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6
include/net/pkt_cls.h
View file

@ -69,17 +69,19 @@ struct tcf_exts {
int police;
};
static inline void tcf_exts_init(struct tcf_exts *exts, int action, int police)
static inline int tcf_exts_init(struct tcf_exts *exts, int action, int police)
{
#ifdef CONFIG_NET_CLS_ACT
exts->type = 0;
exts->nr_actions = 0;
exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
GFP_KERNEL);
WARN_ON(!exts->actions); /* TODO: propagate the error to callers */
if (!exts->actions)
return -ENOMEM;
#endif
exts->action = action;
exts->police = police;
return 0;
}
/**

12
net/sched/cls_basic.c
View file

@ -138,10 +138,12 @@ static int basic_set_parms(struct net *net, struct tcf_proto *tp,
struct tcf_exts e;
struct tcf_ematch_tree t;
tcf_exts_init(&e, TCA_BASIC_ACT, TCA_BASIC_POLICE);
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
err = tcf_exts_init(&e, TCA_BASIC_ACT, TCA_BASIC_POLICE);
if (err < 0)
return err;
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
if (err < 0)
goto errout;
err = tcf_em_tree_validate(tp, tb[TCA_BASIC_EMATCHES], &t);
if (err < 0)
@ -189,7 +191,10 @@ static int basic_change(struct net *net, struct sk_buff *in_skb,
if (!fnew)
return -ENOBUFS;
tcf_exts_init(&fnew->exts, TCA_BASIC_ACT, TCA_BASIC_POLICE);
err = tcf_exts_init(&fnew->exts, TCA_BASIC_ACT, TCA_BASIC_POLICE);
if (err < 0)
goto errout;
err = -EINVAL;
if (handle) {
fnew->handle = handle;
@ -226,6 +231,7 @@ static int basic_change(struct net *net, struct sk_buff *in_skb,
return 0;
errout:
tcf_exts_destroy(&fnew->exts);
kfree(fnew);
return err;
}

29
net/sched/cls_bpf.c
View file

@ -311,17 +311,19 @@ static int cls_bpf_modify_existing(struct net *net, struct tcf_proto *tp,
if ((!is_bpf && !is_ebpf) || (is_bpf && is_ebpf))
return -EINVAL;
tcf_exts_init(&exts, TCA_BPF_ACT, TCA_BPF_POLICE);
ret = tcf_exts_validate(net, tp, tb, est, &exts, ovr);
ret = tcf_exts_init(&exts, TCA_BPF_ACT, TCA_BPF_POLICE);
if (ret < 0)
return ret;
ret = tcf_exts_validate(net, tp, tb, est, &exts, ovr);
if (ret < 0)
goto errout;
if (tb[TCA_BPF_FLAGS]) {
u32 bpf_flags = nla_get_u32(tb[TCA_BPF_FLAGS]);
if (bpf_flags & ~TCA_BPF_FLAG_ACT_DIRECT) {
tcf_exts_destroy(&exts);
return -EINVAL;
ret = -EINVAL;
goto errout;
}
have_exts = bpf_flags & TCA_BPF_FLAG_ACT_DIRECT;
@ -331,10 +333,8 @@ static int cls_bpf_modify_existing(struct net *net, struct tcf_proto *tp,
ret = is_bpf ? cls_bpf_prog_from_ops(tb, prog) :
cls_bpf_prog_from_efd(tb, prog, tp);
if (ret < 0) {
tcf_exts_destroy(&exts);
return ret;
}
if (ret < 0)
goto errout;
if (tb[TCA_BPF_CLASSID]) {
prog->res.classid = nla_get_u32(tb[TCA_BPF_CLASSID]);
@ -343,6 +343,10 @@ static int cls_bpf_modify_existing(struct net *net, struct tcf_proto *tp,
tcf_exts_change(tp, &prog->exts, &exts);
return 0;
errout:
tcf_exts_destroy(&exts);
return ret;
}
static u32 cls_bpf_grab_new_handle(struct tcf_proto *tp,
@ -388,7 +392,9 @@ static int cls_bpf_change(struct net *net, struct sk_buff *in_skb,
if (!prog)
return -ENOBUFS;
tcf_exts_init(&prog->exts, TCA_BPF_ACT, TCA_BPF_POLICE);
ret = tcf_exts_init(&prog->exts, TCA_BPF_ACT, TCA_BPF_POLICE);
if (ret < 0)
goto errout;
if (oldprog) {
if (handle && oldprog->handle != handle) {
@ -420,9 +426,10 @@ static int cls_bpf_change(struct net *net, struct sk_buff *in_skb,
*arg = (unsigned long) prog;
return 0;
errout:
kfree(prog);
errout:
tcf_exts_destroy(&prog->exts);
kfree(prog);
return ret;
}

13
net/sched/cls_cgroup.c
View file

@ -93,7 +93,9 @@ static int cls_cgroup_change(struct net *net, struct sk_buff *in_skb,
if (!new)
return -ENOBUFS;
tcf_exts_init(&new->exts, TCA_CGROUP_ACT, TCA_CGROUP_POLICE);
err = tcf_exts_init(&new->exts, TCA_CGROUP_ACT, TCA_CGROUP_POLICE);
if (err < 0)
goto errout;
new->handle = handle;
new->tp = tp;
err = nla_parse_nested(tb, TCA_CGROUP_MAX, tca[TCA_OPTIONS],
@ -101,10 +103,14 @@ static int cls_cgroup_change(struct net *net, struct sk_buff *in_skb,
if (err < 0)
goto errout;
tcf_exts_init(&e, TCA_CGROUP_ACT, TCA_CGROUP_POLICE);
err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr);
err = tcf_exts_init(&e, TCA_CGROUP_ACT, TCA_CGROUP_POLICE);
if (err < 0)
goto errout;
err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr);
if (err < 0) {
tcf_exts_destroy(&e);
goto errout;
}
err = tcf_em_tree_validate(tp, tb[TCA_CGROUP_EMATCHES], &t);
if (err < 0) {
@ -120,6 +126,7 @@ static int cls_cgroup_change(struct net *net, struct sk_buff *in_skb,
call_rcu(&head->rcu, cls_cgroup_destroy_rcu);
return 0;
errout:
tcf_exts_destroy(&new->exts);
kfree(new);
return err;
}

26
net/sched/cls_flow.c
View file

@ -418,10 +418,12 @@ static int flow_change(struct net *net, struct sk_buff *in_skb,
return -EOPNOTSUPP;
}
tcf_exts_init(&e, TCA_FLOW_ACT, TCA_FLOW_POLICE);
err = tcf_exts_init(&e, TCA_FLOW_ACT, TCA_FLOW_POLICE);
if (err < 0)
goto err1;
err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr);
if (err < 0)
return err;
goto err1;
err = tcf_em_tree_validate(tp, tb[TCA_FLOW_EMATCHES], &t);
if (err < 0)
@ -432,13 +434,15 @@ static int flow_change(struct net *net, struct sk_buff *in_skb,
if (!fnew)
goto err2;
tcf_exts_init(&fnew->exts, TCA_FLOW_ACT, TCA_FLOW_POLICE);
err = tcf_exts_init(&fnew->exts, TCA_FLOW_ACT, TCA_FLOW_POLICE);
if (err < 0)
goto err3;
fold = (struct flow_filter *)*arg;
if (fold) {
err = -EINVAL;
if (fold->handle != handle && handle)
goto err2;
goto err3;
/* Copy fold into fnew */
fnew->tp = fold->tp;
@ -458,31 +462,31 @@ static int flow_change(struct net *net, struct sk_buff *in_skb,
if (tb[TCA_FLOW_MODE])
mode = nla_get_u32(tb[TCA_FLOW_MODE]);
if (mode != FLOW_MODE_HASH && nkeys > 1)
goto err2;
goto err3;
if (mode == FLOW_MODE_HASH)
perturb_period = fold->perturb_period;
if (tb[TCA_FLOW_PERTURB]) {
if (mode != FLOW_MODE_HASH)
goto err2;
goto err3;
perturb_period = nla_get_u32(tb[TCA_FLOW_PERTURB]) * HZ;
}
} else {
err = -EINVAL;
if (!handle)
goto err2;
goto err3;
if (!tb[TCA_FLOW_KEYS])
goto err2;
goto err3;
mode = FLOW_MODE_MAP;
if (tb[TCA_FLOW_MODE])
mode = nla_get_u32(tb[TCA_FLOW_MODE]);
if (mode != FLOW_MODE_HASH && nkeys > 1)
goto err2;
goto err3;
if (tb[TCA_FLOW_PERTURB]) {
if (mode != FLOW_MODE_HASH)
goto err2;
goto err3;
perturb_period = nla_get_u32(tb[TCA_FLOW_PERTURB]) * HZ;
}
@ -542,6 +546,8 @@ static int flow_change(struct net *net, struct sk_buff *in_skb,
call_rcu(&fold->rcu, flow_destroy_filter);
return 0;
err3:
tcf_exts_destroy(&fnew->exts);
err2:
tcf_em_tree_destroy(&t);
kfree(fnew);

11
net/sched/cls_flower.c
View file

@ -513,10 +513,12 @@ static int fl_set_parms(struct net *net, struct tcf_proto *tp,
struct tcf_exts e;
int err;
tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
if (err < 0)
return err;
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
if (err < 0)
goto errout;
if (tb[TCA_FLOWER_CLASSID]) {
f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
@ -585,7 +587,9 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
if (!fnew)
return -ENOBUFS;
tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
if (err < 0)
goto errout;
if (!handle) {
handle = fl_grab_new_handle(tp, head);
@ -649,6 +653,7 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
return 0;
errout:
tcf_exts_destroy(&fnew->exts);
kfree(fnew);
return err;
}

18
net/sched/cls_fw.c
View file

@ -195,10 +195,12 @@ fw_change_attrs(struct net *net, struct tcf_proto *tp, struct fw_filter *f,
u32 mask;
int err;
tcf_exts_init(&e, TCA_FW_ACT, TCA_FW_POLICE);
err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr);
err = tcf_exts_init(&e, TCA_FW_ACT, TCA_FW_POLICE);
if (err < 0)
return err;
err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr);
if (err < 0)
goto errout;
if (tb[TCA_FW_CLASSID]) {
f->res.classid = nla_get_u32(tb[TCA_FW_CLASSID]);
@ -270,10 +272,15 @@ static int fw_change(struct net *net, struct sk_buff *in_skb,
#endif /* CONFIG_NET_CLS_IND */
fnew->tp = f->tp;
tcf_exts_init(&fnew->exts, TCA_FW_ACT, TCA_FW_POLICE);
err = tcf_exts_init(&fnew->exts, TCA_FW_ACT, TCA_FW_POLICE);
if (err < 0) {
kfree(fnew);
return err;
}
err = fw_change_attrs(net, tp, fnew, tb, tca, base, ovr);
if (err < 0) {
tcf_exts_destroy(&fnew->exts);
kfree(fnew);
return err;
}
@ -313,7 +320,9 @@ static int fw_change(struct net *net, struct sk_buff *in_skb,
if (f == NULL)
return -ENOBUFS;
tcf_exts_init(&f->exts, TCA_FW_ACT, TCA_FW_POLICE);
err = tcf_exts_init(&f->exts, TCA_FW_ACT, TCA_FW_POLICE);
if (err < 0)
goto errout;
f->id = handle;
f->tp = tp;
@ -328,6 +337,7 @@ static int fw_change(struct net *net, struct sk_buff *in_skb,
return 0;
errout:
tcf_exts_destroy(&f->exts);
kfree(f);
return err;
}

14
net/sched/cls_route.c
View file

@ -383,17 +383,19 @@ static int route4_set_parms(struct net *net, struct tcf_proto *tp,
struct nlattr **tb, struct nlattr *est, int new,
bool ovr)
{
int err;
u32 id = 0, to = 0, nhandle = 0x8000;
struct route4_filter *fp;
unsigned int h1;
struct route4_bucket *b;
struct tcf_exts e;
int err;
tcf_exts_init(&e, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
err = tcf_exts_init(&e, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
if (err < 0)
return err;
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
if (err < 0)
goto errout;
err = -EINVAL;
if (tb[TCA_ROUTE4_TO]) {
@ -503,7 +505,10 @@ static int route4_change(struct net *net, struct sk_buff *in_skb,
if (!f)
goto errout;
tcf_exts_init(&f->exts, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
err = tcf_exts_init(&f->exts, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
if (err < 0)
goto errout;
if (fold) {
f->id = fold->id;
f->iif = fold->iif;
@ -557,6 +562,7 @@ static int route4_change(struct net *net, struct sk_buff *in_skb,
return 0;
errout:
tcf_exts_destroy(&f->exts);
kfree(f);
return err;
}

17
net/sched/cls_rsvp.h
View file

@ -487,10 +487,12 @@ static int rsvp_change(struct net *net, struct sk_buff *in_skb,
if (err < 0)
return err;
tcf_exts_init(&e, TCA_RSVP_ACT, TCA_RSVP_POLICE);
err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr);
err = tcf_exts_init(&e, TCA_RSVP_ACT, TCA_RSVP_POLICE);
if (err < 0)
return err;
err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr);
if (err < 0)
goto errout2;
f = (struct rsvp_filter *)*arg;
if (f) {
@ -506,7 +508,11 @@ static int rsvp_change(struct net *net, struct sk_buff *in_skb,
goto errout2;
}
tcf_exts_init(&n->exts, TCA_RSVP_ACT, TCA_RSVP_POLICE);
err = tcf_exts_init(&n->exts, TCA_RSVP_ACT, TCA_RSVP_POLICE);
if (err < 0) {
kfree(n);
goto errout2;
}
if (tb[TCA_RSVP_CLASSID]) {
n->res.classid = nla_get_u32(tb[TCA_RSVP_CLASSID]);
@ -530,7 +536,9 @@ static int rsvp_change(struct net *net, struct sk_buff *in_skb,
if (f == NULL)
goto errout2;
tcf_exts_init(&f->exts, TCA_RSVP_ACT, TCA_RSVP_POLICE);
err = tcf_exts_init(&f->exts, TCA_RSVP_ACT, TCA_RSVP_POLICE);
if (err < 0)
goto errout;
h2 = 16;
if (tb[TCA_RSVP_SRC]) {
memcpy(f->src, nla_data(tb[TCA_RSVP_SRC]), sizeof(f->src));
@ -627,6 +635,7 @@ static int rsvp_change(struct net *net, struct sk_buff *in_skb,
goto insert;
errout:
tcf_exts_destroy(&f->exts);
kfree(f);
errout2:
tcf_exts_destroy(&e);

90
net/sched/cls_tcindex.c
View file

@ -219,10 +219,10 @@ static const struct nla_policy tcindex_policy[TCA_TCINDEX_MAX + 1] = {
[TCA_TCINDEX_CLASSID] = { .type = NLA_U32 },
};
static void tcindex_filter_result_init(struct tcindex_filter_result *r)
static int tcindex_filter_result_init(struct tcindex_filter_result *r)
{
memset(r, 0, sizeof(*r));
tcf_exts_init(&r->exts, TCA_TCINDEX_ACT, TCA_TCINDEX_POLICE);
return tcf_exts_init(&r->exts, TCA_TCINDEX_ACT, TCA_TCINDEX_POLICE);
}
static void __tcindex_partial_destroy(struct rcu_head *head)
@ -233,23 +233,57 @@ static void __tcindex_partial_destroy(struct rcu_head *head)
kfree(p);
}
static void tcindex_free_perfect_hash(struct tcindex_data *cp)
{
int i;
for (i = 0; i < cp->hash; i++)
tcf_exts_destroy(&cp->perfect[i].exts);
kfree(cp->perfect);
}
static int tcindex_alloc_perfect_hash(struct tcindex_data *cp)
{
int i, err = 0;
cp->perfect = kcalloc(cp->hash, sizeof(struct tcindex_filter_result),
GFP_KERNEL);
if (!cp->perfect)
return -ENOMEM;
for (i = 0; i < cp->hash; i++) {
err = tcf_exts_init(&cp->perfect[i].exts,
TCA_TCINDEX_ACT, TCA_TCINDEX_POLICE);
if (err < 0)
goto errout;
}
return 0;
errout:
tcindex_free_perfect_hash(cp);
return err;
}
static int
tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
u32 handle, struct tcindex_data *p,
struct tcindex_filter_result *r, struct nlattr **tb,
struct nlattr *est, bool ovr)
{
int err, balloc = 0;
struct tcindex_filter_result new_filter_result, *old_r = r;
struct tcindex_filter_result cr;
struct tcindex_data *cp, *oldp;
struct tcindex_data *cp = NULL, *oldp;
struct tcindex_filter *f = NULL; /* make gcc behave */
int err, balloc = 0;
struct tcf_exts e;
tcf_exts_init(&e, TCA_TCINDEX_ACT, TCA_TCINDEX_POLICE);
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
err = tcf_exts_init(&e, TCA_TCINDEX_ACT, TCA_TCINDEX_POLICE);
if (err < 0)
return err;
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
if (err < 0)
goto errout;
err = -ENOMEM;
/* tcindex_data attributes must look atomic to classifier/lookup so
@ -270,19 +304,20 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
if (p->perfect) {
int i;
cp->perfect = kmemdup(p->perfect,
sizeof(*r) * cp->hash, GFP_KERNEL);
if (!cp->perfect)
if (tcindex_alloc_perfect_hash(cp) < 0)
goto errout;
for (i = 0; i < cp->hash; i++)
tcf_exts_init(&cp->perfect[i].exts,
TCA_TCINDEX_ACT, TCA_TCINDEX_POLICE);
cp->perfect[i].res = p->perfect[i].res;
balloc = 1;
}
cp->h = p->h;
tcindex_filter_result_init(&new_filter_result);
tcindex_filter_result_init(&cr);
err = tcindex_filter_result_init(&new_filter_result);
if (err < 0)
goto errout1;
err = tcindex_filter_result_init(&cr);
if (err < 0)
goto errout1;
if (old_r)
cr.res = r->res;
@ -338,15 +373,8 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
err = -ENOMEM;
if (!cp->perfect && !cp->h) {
if (valid_perfect_hash(cp)) {
int i;
cp->perfect = kcalloc(cp->hash, sizeof(*r), GFP_KERNEL);
if (!cp->perfect)
if (tcindex_alloc_perfect_hash(cp) < 0)
goto errout_alloc;
for (i = 0; i < cp->hash; i++)
tcf_exts_init(&cp->perfect[i].exts,
TCA_TCINDEX_ACT,
TCA_TCINDEX_POLICE);
balloc = 1;
} else {
struct tcindex_filter __rcu **hash;
@ -373,8 +401,12 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
if (!f)
goto errout_alloc;
f->key = handle;
tcindex_filter_result_init(&f->result);
f->next = NULL;
err = tcindex_filter_result_init(&f->result);
if (err < 0) {
kfree(f);
goto errout_alloc;
}
}
if (tb[TCA_TCINDEX_CLASSID]) {
@ -387,8 +419,13 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
else
tcf_exts_change(tp, &cr.exts, &e);
if (old_r && old_r != r)
tcindex_filter_result_init(old_r);
if (old_r && old_r != r) {
err = tcindex_filter_result_init(old_r);
if (err < 0) {
kfree(f);
goto errout_alloc;
}
}
oldp = p;
r->res = cr.res;
@ -415,9 +452,12 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
errout_alloc:
if (balloc == 1)
kfree(cp->perfect);
tcindex_free_perfect_hash(cp);
else if (balloc == 2)
kfree(cp->h);
errout1:
tcf_exts_destroy(&cr.exts);
tcf_exts_destroy(&new_filter_result.exts);
errout:
kfree(cp);
tcf_exts_destroy(&e);

21
net/sched/cls_u32.c
View file

@ -709,13 +709,15 @@ static int u32_set_parms(struct net *net, struct tcf_proto *tp,
struct tc_u_knode *n, struct nlattr **tb,
struct nlattr *est, bool ovr)
{
int err;
struct tcf_exts e;
int err;
tcf_exts_init(&e, TCA_U32_ACT, TCA_U32_POLICE);
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
err = tcf_exts_init(&e, TCA_U32_ACT, TCA_U32_POLICE);
if (err < 0)
return err;
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
if (err < 0)
goto errout;
err = -EINVAL;
if (tb[TCA_U32_LINK]) {
@ -833,7 +835,10 @@ static struct tc_u_knode *u32_init_knode(struct tcf_proto *tp,
new->tp = tp;
memcpy(&new->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
tcf_exts_init(&new->exts, TCA_U32_ACT, TCA_U32_POLICE);
if (tcf_exts_init(&new->exts, TCA_U32_ACT, TCA_U32_POLICE)) {
kfree(new);
return NULL;
}
return new;
}
@ -985,9 +990,12 @@ static int u32_change(struct net *net, struct sk_buff *in_skb,
n->handle = handle;
n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0;
n->flags = flags;
tcf_exts_init(&n->exts, TCA_U32_ACT, TCA_U32_POLICE);
n->tp = tp;
err = tcf_exts_init(&n->exts, TCA_U32_ACT, TCA_U32_POLICE);
if (err < 0)
goto errout;
#ifdef CONFIG_CLS_U32_MARK
n->pcpu_success = alloc_percpu(u32);
if (!n->pcpu_success) {
@ -1028,9 +1036,10 @@ static int u32_change(struct net *net, struct sk_buff *in_skb,
errhw:
#ifdef CONFIG_CLS_U32_MARK
free_percpu(n->pcpu_success);
errout:
#endif
errout:
tcf_exts_destroy(&n->exts);
#ifdef CONFIG_CLS_U32_PERF
free_percpu(n->pf);
#endif