diff options
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 35 | ||||
| -rw-r--r-- | net/core/filter.c | 7 |
2 files changed, 31 insertions, 11 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 9abc503b19b..fb8b0546485 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2283,8 +2283,8 @@ EXPORT_SYMBOL(skb_checksum_help); __be16 skb_network_protocol(struct sk_buff *skb, int *depth) { + unsigned int vlan_depth = skb->mac_len; __be16 type = skb->protocol; - int vlan_depth = skb->mac_len; /* Tunnel gso handlers can set protocol to ethernet. */ if (type == htons(ETH_P_TEB)) { @@ -2297,15 +2297,30 @@ __be16 skb_network_protocol(struct sk_buff *skb, int *depth) type = eth->h_proto; } - while (type == htons(ETH_P_8021Q) || type == htons(ETH_P_8021AD)) { - struct vlan_hdr *vh; - - if (unlikely(!pskb_may_pull(skb, vlan_depth + VLAN_HLEN))) - return 0; - - vh = (struct vlan_hdr *)(skb->data + vlan_depth); - type = vh->h_vlan_encapsulated_proto; - vlan_depth += VLAN_HLEN; + /* if skb->protocol is 802.1Q/AD then the header should already be + * present at mac_len - VLAN_HLEN (if mac_len > 0), or at + * ETH_HLEN otherwise + */ + if (type == htons(ETH_P_8021Q) || type == htons(ETH_P_8021AD)) { + if (vlan_depth) { + if (unlikely(WARN_ON(vlan_depth < VLAN_HLEN))) + return 0; + vlan_depth -= VLAN_HLEN; + } else { + vlan_depth = ETH_HLEN; + } + do { + struct vlan_hdr *vh; + + if (unlikely(!pskb_may_pull(skb, + vlan_depth + VLAN_HLEN))) + return 0; + + vh = (struct vlan_hdr *)(skb->data + vlan_depth); + type = vh->h_vlan_encapsulated_proto; + vlan_depth += VLAN_HLEN; + } while (type == htons(ETH_P_8021Q) || + type == htons(ETH_P_8021AD)); } *depth = vlan_depth; diff --git a/net/core/filter.c b/net/core/filter.c index 9d79ca0a6e8..4aec7b93f1a 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -1559,8 +1559,13 @@ static struct sk_filter *__sk_prepare_filter(struct sk_filter *fp, fp->jited = 0; err = sk_chk_filter(fp->insns, fp->len); - if (err) + if (err) { + if (sk != NULL) + sk_filter_uncharge(sk, fp); + else + kfree(fp); return ERR_PTR(err); + } /* Probe if we can JIT compile the filter and if so, do * the compilation of the filter. |