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authorGustavo A. R. Silva <gustavoars@kernel.org>2020-07-30 11:03:14 -0500
committerDavid S. Miller <davem@davemloft.net>2020-07-31 16:50:39 -0700
commit77aec5e1c4935e37c8cbb818a69f2f7d3433ede5 (patch)
treece397cf506a6bb4ca8dd484f87196a2514ca8de3 /net/sched
parent26b4b2d99c3a0abe7b6ff4969f48afdda0931573 (diff)
net/sched: cls_u32: Use struct_size() helper
Make use of the struct_size() helper, in multiple places, instead of an open-coded version in order to avoid any potential type mistakes and protect against potential integer overflows. Also, remove unnecessary object identifier size. Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
-rw-r--r--net/sched/cls_u32.c20
1 files changed, 6 insertions, 14 deletions
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 771b068f8254..7b69ab1993ba 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -852,9 +852,6 @@ static int u32_change(struct net *net, struct sk_buff *in_skb,
u32 htid, flags = 0;
size_t sel_size;
int err;
-#ifdef CONFIG_CLS_U32_PERF
- size_t size;
-#endif
if (!opt) {
if (handle) {
@@ -1022,15 +1019,15 @@ static int u32_change(struct net *net, struct sk_buff *in_skb,
goto erridr;
}
- n = kzalloc(offsetof(typeof(*n), sel) + sel_size, GFP_KERNEL);
+ n = kzalloc(struct_size(n, sel.keys, s->nkeys), GFP_KERNEL);
if (n == NULL) {
err = -ENOBUFS;
goto erridr;
}
#ifdef CONFIG_CLS_U32_PERF
- size = sizeof(struct tc_u32_pcnt) + s->nkeys * sizeof(u64);
- n->pf = __alloc_percpu(size, __alignof__(struct tc_u32_pcnt));
+ n->pf = __alloc_percpu(struct_size(n->pf, kcnts, s->nkeys),
+ __alignof__(struct tc_u32_pcnt));
if (!n->pf) {
err = -ENOBUFS;
goto errfree;
@@ -1294,8 +1291,7 @@ static int u32_dump(struct net *net, struct tcf_proto *tp, void *fh,
int cpu;
#endif
- if (nla_put(skb, TCA_U32_SEL,
- sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
+ if (nla_put(skb, TCA_U32_SEL, struct_size(&n->sel, keys, n->sel.nkeys),
&n->sel))
goto nla_put_failure;
@@ -1345,9 +1341,7 @@ static int u32_dump(struct net *net, struct tcf_proto *tp, void *fh,
goto nla_put_failure;
}
#ifdef CONFIG_CLS_U32_PERF
- gpf = kzalloc(sizeof(struct tc_u32_pcnt) +
- n->sel.nkeys * sizeof(u64),
- GFP_KERNEL);
+ gpf = kzalloc(struct_size(gpf, kcnts, n->sel.nkeys), GFP_KERNEL);
if (!gpf)
goto nla_put_failure;
@@ -1361,9 +1355,7 @@ static int u32_dump(struct net *net, struct tcf_proto *tp, void *fh,
gpf->kcnts[i] += pf->kcnts[i];
}
- if (nla_put_64bit(skb, TCA_U32_PCNT,
- sizeof(struct tc_u32_pcnt) +
- n->sel.nkeys * sizeof(u64),
+ if (nla_put_64bit(skb, TCA_U32_PCNT, struct_size(gpf, kcnts, n->sel.nkeys),
gpf, TCA_U32_PAD)) {
kfree(gpf);
goto nla_put_failure;