From: John Fastabend <john.fastabend@gmail.com>
Date: Wed, 18 Oct 2017 07:11:22 -0700
Subject: bpf: require CAP_NET_ADMIN when using sockmap maps
Patch-mainline: v4.14-rc6
Git-commit: fb50df8d32283cd95932a182a46a10070c4a8832
References: bsc#1109837
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
kernel/bpf/sockmap.c | 3 +++
1 file changed, 3 insertions(+)
--- a/kernel/bpf/sockmap.c
+++ b/kernel/bpf/sockmap.c
@@ -486,6 +486,9 @@ static struct bpf_map *sock_map_alloc(un
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)