bpf: udp: Avoid calling reuseport's bpf_prog from udp_gro
commit 257a525f upstream. When the commit a6024562 ("udp: Add GRO functions to UDP socket") added udp[46]_lib_lookup_skb to the udp_gro code path, it broke the reuseport_select_sock() assumption that skb->data is pointing to the transport header. This patch follows an earlier __udp6_lib_err() fix by passing a NULL skb to avoid calling the reuseport's bpf_prog. Fixes: a6024562 ("udp: Add GRO functions to UDP socket") Cc: Tom Herbert <tom@herbertland.com> Signed-off-by:Martin KaFai Lau <kafai@fb.com> Acked-by:
Song Liu <songliubraving@fb.com> Signed-off-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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