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| author | John Fastabend <john.fastabend@gmail.com> | 2017-10-18 17:11:22 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-20 15:01:29 +0300 |
| commit | fb50df8d32283cd95932a182a46a10070c4a8832 (patch) | |
| tree | b04d6da4d4cf84e38de8b3b5ff344661598f8fdc | |
| parent | f7e9cb1ecb6d922584abff16db07930162c57155 (diff) | |
| download | linux-fb50df8d32283cd95932a182a46a10070c4a8832.tar.xz | |
bpf: require CAP_NET_ADMIN when using sockmap maps
Restrict sockmap to CAP_NET_ADMIN.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | kernel/bpf/sockmap.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/bpf/sockmap.c b/kernel/bpf/sockmap.c index beaabb21c3a3..2b6eb35ae5d3 100644 --- a/kernel/bpf/sockmap.c +++ b/kernel/bpf/sockmap.c @@ -486,6 +486,9 @@ static struct bpf_map *sock_map_alloc(union bpf_attr *attr) int err = -EINVAL; u64 cost; + if (!capable(CAP_NET_ADMIN)) + return ERR_PTR(-EPERM); + /* check sanity of attributes */ if (attr->max_entries == 0 || attr->key_size != 4 || attr->value_size != 4 || attr->map_flags & ~BPF_F_NUMA_NODE) |