xdp.data_hard_start is mapped to the first address of xdp_frame, but the pointer hard_start is the offset(sizeof(struct xdp_frame)) of xdp_frame, it should use head instead of hard_start to set xdp.data_hard_start. Otherwise, if BPF program calls helper_function such as bpf_xdp_adjust_head, it will be confused for xdp_frame_end. Signed-off-by: Mao Wenan <maowenan@xxxxxxxxxx> --- drivers/net/veth.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/veth.c b/drivers/net/veth.c index d4cbb9e8c63f..5ea550884bf8 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -506,7 +506,7 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq, struct xdp_buff xdp; u32 act; - xdp.data_hard_start = hard_start; + xdp.data_hard_start = head; xdp.data = frame->data; xdp.data_end = frame->data + frame->len; xdp.data_meta = frame->data - frame->metasize; -- 2.20.1
