diff options
Diffstat (limited to 'net/bpf/test_run.c')
| -rw-r--r-- | net/bpf/test_run.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index 29dbdd4c29f6..bfd4ccd80847 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -160,16 +160,20 @@ static void *bpf_test_init(const union bpf_attr *kattr, u32 size, u32 headroom, u32 tailroom) { void __user *data_in = u64_to_user_ptr(kattr->test.data_in); + u32 user_size = kattr->test.data_size_in; void *data; if (size < ETH_HLEN || size > PAGE_SIZE - headroom - tailroom) return ERR_PTR(-EINVAL); + if (user_size > size) + return ERR_PTR(-EMSGSIZE); + data = kzalloc(size + headroom + tailroom, GFP_USER); if (!data) return ERR_PTR(-ENOMEM); - if (copy_from_user(data + headroom, data_in, size)) { + if (copy_from_user(data + headroom, data_in, user_size)) { kfree(data); return ERR_PTR(-EFAULT); } @@ -470,25 +474,32 @@ out: int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr) { + u32 tailroom = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); + u32 headroom = XDP_PACKET_HEADROOM; u32 size = kattr->test.data_size_in; u32 repeat = kattr->test.repeat; struct netdev_rx_queue *rxqueue; struct xdp_buff xdp = {}; u32 retval, duration; + u32 max_data_sz; void *data; int ret; if (kattr->test.ctx_in || kattr->test.ctx_out) return -EINVAL; - data = bpf_test_init(kattr, size, XDP_PACKET_HEADROOM + NET_IP_ALIGN, 0); + /* XDP have extra tailroom as (most) drivers use full page */ + max_data_sz = 4096 - headroom - tailroom; + + data = bpf_test_init(kattr, max_data_sz, headroom, tailroom); if (IS_ERR(data)) return PTR_ERR(data); xdp.data_hard_start = data; - xdp.data = data + XDP_PACKET_HEADROOM + NET_IP_ALIGN; + xdp.data = data + headroom; xdp.data_meta = xdp.data; xdp.data_end = xdp.data + size; + xdp.frame_sz = headroom + max_data_sz + tailroom; rxqueue = __netif_get_rx_queue(current->nsproxy->net_ns->loopback_dev, 0); xdp.rxq = &rxqueue->xdp_rxq; @@ -496,8 +507,7 @@ int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, ret = bpf_test_run(prog, &xdp, repeat, &retval, &duration, true); if (ret) goto out; - if (xdp.data != data + XDP_PACKET_HEADROOM + NET_IP_ALIGN || - xdp.data_end != xdp.data + size) + if (xdp.data != data + headroom || xdp.data_end != xdp.data + size) size = xdp.data_end - xdp.data; ret = bpf_test_finish(kattr, uattr, xdp.data, size, retval, duration); out: |