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bpf: explicitly prohibit ctx_{in, out} in non-skb BPF_PROG_TEST_RUN

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This should allow us later to extend BPF_PROG_TEST_RUN for non-skb case
and be sure that nobody is erroneously setting ctx_{in,out}.

Fixes: b0b9395d86 ("bpf: support input __sk_buff context in BPF_PROG_TEST_RUN")
Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Stanislav Fomichev 2019-04-11 15:47:07 -07:00 • committed by Daniel Borkmann
parent 6b7a21140f
commit 947e8b595b
1 changed files with 6 additions and 0 deletions
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6
net/bpf/test_run.c
View file

@ -347,6 +347,9 @@ int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
void *data; void *data;
int ret; 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); data = bpf_test_init(kattr, size, XDP_PACKET_HEADROOM + NET_IP_ALIGN, 0);
if (IS_ERR(data)) if (IS_ERR(data))
return PTR_ERR(data); return PTR_ERR(data);
@ -390,6 +393,9 @@ int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
if (prog->type != BPF_PROG_TYPE_FLOW_DISSECTOR) if (prog->type != BPF_PROG_TYPE_FLOW_DISSECTOR)
return -EINVAL; return -EINVAL;
if (kattr->test.ctx_in || kattr->test.ctx_out)
return -EINVAL;
data = bpf_test_init(kattr, size, NET_SKB_PAD + NET_IP_ALIGN, data = bpf_test_init(kattr, size, NET_SKB_PAD + NET_IP_ALIGN,
SKB_DATA_ALIGN(sizeof(struct skb_shared_info))); SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
if (IS_ERR(data)) if (IS_ERR(data))