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authorWillem de Bruijn <willemb@google.com>2019-03-06 14:35:15 -0500
committerDaniel Borkmann <daniel@iogearbox.net>2019-03-07 10:32:24 +0100
commit4c3024debf62de4c6ac6d3cb4c0063be21d4f652 (patch)
tree0f076dcbe8e620af3420ba60a27ae6a2556897ea /net
parent78c3aff834f7939d1a2570e366e33f2a880d4d9e (diff)
downloadlinux-4c3024debf62de4c6ac6d3cb4c0063be21d4f652.tar.bz2
bpf: only test gso type on gso packets
BPF can adjust gso only for tcp bytestreams. Fail on other gso types. But only on gso packets. It does not touch this field if !gso_size. Fixes: b90efd225874 ("bpf: only adjust gso_size on bytestream protocols") Signed-off-by: Willem de Bruijn <willemb@google.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/filter.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/net/core/filter.c b/net/core/filter.c
index 5ceba98069d4..f274620945ff 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2804,7 +2804,7 @@ static int bpf_skb_proto_4_to_6(struct sk_buff *skb)
u32 off = skb_mac_header_len(skb);
int ret;
- if (!skb_is_gso_tcp(skb))
+ if (skb_is_gso(skb) && !skb_is_gso_tcp(skb))
return -ENOTSUPP;
ret = skb_cow(skb, len_diff);
@@ -2845,7 +2845,7 @@ static int bpf_skb_proto_6_to_4(struct sk_buff *skb)
u32 off = skb_mac_header_len(skb);
int ret;
- if (!skb_is_gso_tcp(skb))
+ if (skb_is_gso(skb) && !skb_is_gso_tcp(skb))
return -ENOTSUPP;
ret = skb_unclone(skb, GFP_ATOMIC);
@@ -2970,7 +2970,7 @@ static int bpf_skb_net_grow(struct sk_buff *skb, u32 len_diff)
u32 off = skb_mac_header_len(skb) + bpf_skb_net_base_len(skb);
int ret;
- if (!skb_is_gso_tcp(skb))
+ if (skb_is_gso(skb) && !skb_is_gso_tcp(skb))
return -ENOTSUPP;
ret = skb_cow(skb, len_diff);
@@ -2999,7 +2999,7 @@ static int bpf_skb_net_shrink(struct sk_buff *skb, u32 len_diff)
u32 off = skb_mac_header_len(skb) + bpf_skb_net_base_len(skb);
int ret;
- if (!skb_is_gso_tcp(skb))
+ if (skb_is_gso(skb) && !skb_is_gso_tcp(skb))
return -ENOTSUPP;
ret = skb_unclone(skb, GFP_ATOMIC);