diff options
| author | David Ahern <dsahern@gmail.com> | 2017-08-31 15:05:45 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-09-01 06:05:15 +0100 |
| commit | ae2cf1c466bea99e927899707aed022942505d27 (patch) | |
| tree | 43d9417f06dc3330cb01741daeb32c0e92cb0271 /net/core | |
| parent | 482dca939fb7ee35ba20b944b4c2476133dbf0df (diff) | |
bpf: Allow cgroup sock filters to use get_current_uid_gid helper
Allow BPF programs run on sock create to use the get_current_uid_gid
helper. IPv4 and IPv6 sockets are created in a process context so
there is always a valid uid/gid
Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/filter.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index f51b9690adf3..9dad3e7e2e10 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -3150,6 +3150,20 @@ bpf_base_func_proto(enum bpf_func_id func_id) } static const struct bpf_func_proto * +sock_filter_func_proto(enum bpf_func_id func_id) +{ + switch (func_id) { + /* inet and inet6 sockets are created in a process + * context so there is always a valid uid/gid + */ + case BPF_FUNC_get_current_uid_gid: + return &bpf_get_current_uid_gid_proto; + default: + return bpf_base_func_proto(func_id); + } +} + +static const struct bpf_func_proto * sk_filter_func_proto(enum bpf_func_id func_id) { switch (func_id) { @@ -4233,7 +4247,7 @@ const struct bpf_verifier_ops lwt_xmit_prog_ops = { }; const struct bpf_verifier_ops cg_sock_prog_ops = { - .get_func_proto = bpf_base_func_proto, + .get_func_proto = sock_filter_func_proto, .is_valid_access = sock_filter_is_valid_access, .convert_ctx_access = sock_filter_convert_ctx_access, }; |