From 0ab03f353d3613ea49d1f924faf98559003670a8 Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Tue, 2 Apr 2019 08:16:03 +0200 Subject: net-gro: Fix GRO flush when receiving a GSO packet. Currently we may merge incorrectly a received GSO packet or a packet with frag_list into a packet sitting in the gro_hash list. skb_segment() may crash case because the assumptions on the skb layout are not met. The correct behaviour would be to flush the packet in the gro_hash list and send the received GSO packet directly afterwards. Commit d61d072e87c8e ("net-gro: avoid reorders") sets NAPI_GRO_CB(skb)->flush in this case, but this is not checked before merging. This patch makes sure to check this flag and to not merge in that case. Fixes: d61d072e87c8e ("net-gro: avoid reorders") Signed-off-by: Steffen Klassert Signed-off-by: David S. Miller --- net/core/skbuff.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/core/skbuff.c') diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 2415d9cb9b89..ef2cd5712098 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3801,7 +3801,7 @@ int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb) unsigned int delta_truesize; struct sk_buff *lp; - if (unlikely(p->len + len >= 65536)) + if (unlikely(p->len + len >= 65536 || NAPI_GRO_CB(skb)->flush)) return -E2BIG; lp = NAPI_GRO_CB(p)->last; -- cgit From d85e8be2a5a02869f815dd0ac2d743deb4cd7957 Mon Sep 17 00:00:00 2001 From: Yuya Kusakabe Date: Tue, 16 Apr 2019 10:22:28 +0900 Subject: net: Fix missing meta data in skb with vlan packet skb_reorder_vlan_header() should move XDP meta data with ethernet header if XDP meta data exists. Fixes: de8f3a83b0a0 ("bpf: add meta pointer for direct access") Signed-off-by: Yuya Kusakabe Signed-off-by: Takeru Hayasaka Co-developed-by: Takeru Hayasaka Reviewed-by: Toshiaki Makita Signed-off-by: David S. Miller --- net/core/skbuff.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'net/core/skbuff.c') diff --git a/net/core/skbuff.c b/net/core/skbuff.c index ef2cd5712098..40796b8bf820 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -5083,7 +5083,8 @@ EXPORT_SYMBOL_GPL(skb_gso_validate_mac_len); static struct sk_buff *skb_reorder_vlan_header(struct sk_buff *skb) { - int mac_len; + int mac_len, meta_len; + void *meta; if (skb_cow(skb, skb_headroom(skb)) < 0) { kfree_skb(skb); @@ -5095,6 +5096,13 @@ static struct sk_buff *skb_reorder_vlan_header(struct sk_buff *skb) memmove(skb_mac_header(skb) + VLAN_HLEN, skb_mac_header(skb), mac_len - VLAN_HLEN - ETH_TLEN); } + + meta_len = skb_metadata_len(skb); + if (meta_len) { + meta = skb_metadata_end(skb) - meta_len; + memmove(meta + VLAN_HLEN, meta, meta_len); + } + skb->mac_header += VLAN_HLEN; return skb; } -- cgit