diff options
| author |   Willem de Bruijn <willemb@google.com> | 2019-04-12 09:30:48 -0400 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2019-04-16 09:56:20 +0200 |
| commit | 43537b8e2dc515e037e855504db3f6c7cf73c79f (patch) | |
| tree | 942457b168dbd56db51eeaeaa76fb792e09149b0 /net/core | |
| parent | bpf: fix whitespace for ENCAP_L2 defines in bpf.h (diff) | |
| download | linux-dev-43537b8e2dc515e037e855504db3f6c7cf73c79f.tar.xz linux-dev-43537b8e2dc515e037e855504db3f6c7cf73c79f.zip | |
bpf: reserve flags in bpf_skb_net_shrink
The ENCAP flags in bpf_skb_adjust_room are ignored on decap with
bpf_skb_net_shrink. Reserve these bits for future use.
Fixes: 868d523535c2d ("bpf: add bpf_skb_adjust_room encap flags")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/filter.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index 95a27fdf9a40..bd1f51907b83 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -3069,6 +3069,9 @@ static int bpf_skb_net_shrink(struct sk_buff *skb, u32 off, u32 len_diff, { int ret; + if (flags & ~BPF_F_ADJ_ROOM_FIXED_GSO) + return -EINVAL; + if (skb_is_gso(skb) && !skb_is_gso_tcp(skb)) { /* udp gso_size delineates datagrams, only allow if fixed */ if (!(skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) || |