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authorStanislav Fomichev <sdf@google.com>2019-04-12 01:47:07 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2019-04-12 01:53:00 +0300
commit947e8b595b82d3551750641445d0a97b8f29b536 (patch)
tree24574cb59c6ba3a5455d910bfeff35af084f8316
parent6b7a21140fca461c6d8d5c65a3746e7da50a409e (diff)
downloadlinux-947e8b595b82d3551750641445d0a97b8f29b536.tar.xz
bpf: explicitly prohibit ctx_{in, out} in non-skb BPF_PROG_TEST_RUN
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: b0b9395d865e ("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>
-rw-r--r--net/bpf/test_run.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index cbd4fb65aa4f..2221573dacdb 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -347,6 +347,9 @@ int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
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);
if (IS_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)
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,
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
if (IS_ERR(data))