[PATCH net-next 4/4] bpf: allow access to skb->len from offloads

[Jakub Kicinski]

Since we are now doing strict checking of what offloads
may access, make sure skb->len is on that list.

Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
---
 net/core/filter.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/core/filter.c b/net/core/filter.c
index a908e5da5ffc..f8cd4d9aeb94 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -3656,6 +3656,8 @@ tc_cls_act_is_valid_access_analyzer(int off, int size,
                                    struct bpf_insn_access_aux *info)
 {
        switch (off) {
+       case offsetof(struct sk_buff, len):
+               return true;
        case offsetof(struct sk_buff, data):
                info->reg_type = PTR_TO_PACKET;
                return true;
-- 
2.14.1