bpf: Fix bpf_xdp_event_output

Fix a typo. xdp->data instead of xdp should be copied to the perf-event's
dst_buff.

Fixes: 4de16969523c ("bpf: enable event output helper also for xdp types")
Reported-by: Huapeng Zhou <hzhou@fb.com>
Tested-by: Feixiong Zhang <feixiong@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/filter.c b/net/core/filter.c
index e466e00..ebaeaf2 100644 (file)
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2584,8 +2584,8 @@ BPF_CALL_5(bpf_xdp_event_output, struct xdp_buff *, xdp, struct bpf_map *, map,
        if (unlikely(xdp_size > (unsigned long)(xdp->data_end - xdp->data)))
                return -EFAULT;
 
-       return bpf_event_output(map, flags, meta, meta_size, xdp, xdp_size,
-                               bpf_xdp_copy);
+       return bpf_event_output(map, flags, meta, meta_size, xdp->data,
+                               xdp_size, bpf_xdp_copy);
 }
 
 static const struct bpf_func_proto bpf_xdp_event_output_proto = {