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selftests/bpf: Fix v4_to_v6 in sk_lookup

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I'm getting some garbage in bytes 8 and 9 when doing conversion
from sockaddr_in to sockaddr_in6 (leftover from AF_INET?). Let's
explicitly clear the higher bytes.

Fixes: 0ab5539f85 ("selftests/bpf: Tests for BPF_SK_LOOKUP attach point")
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/20200807223846.4190917-1-sdf@google.com
This commit is contained in:
Stanislav Fomichev 2020-08-07 15:38:46 -07:00 committed by Daniel Borkmann
parent 0390c429db
commit da7bdfdd23
1 changed files with 1 additions and 0 deletions
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tools/testing/selftests/bpf/prog_tests/sk_lookup.c
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@ -309,6 +309,7 @@ static void v4_to_v6(struct sockaddr_storage *ss)
v6->sin6_addr.s6_addr[10] = 0xff;
v6->sin6_addr.s6_addr[11] = 0xff;
memcpy(&v6->sin6_addr.s6_addr[12], &v4.sin_addr.s_addr, 4);
memset(&v6->sin6_addr.s6_addr[0], 0, 10);
}
static int udp_recv_send(int server_fd)