From: Chenbo Feng <fengc@google.com>
Date: Wed, 31 May 2017 18:15:59 -0700
Subject: bpf: Allow CGROUP_SKB eBPF program to access sk_buff
Patch-mainline: v4.13-rc1
Git-commit: fb9a307d11d62749d75b404f15517d73f5d6e148
References: bsc#1056787
This allows cgroup eBPF program to classify packet based on their
protocol or other detail information. Currently program need
CAP_NET_ADMIN privilege to attach a cgroup eBPF program, and A
process with CAP_NET_ADMIN can already see all packets on the system,
for example, by creating an iptables rules that causes the packet to
be passed to userspace via NFLOG.
Signed-off-by: Chenbo Feng <fengc@google.com>
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/verifier.c | 1 +
1 file changed, 1 insertion(+)
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -2582,6 +2582,7 @@ static bool may_access_skb(enum bpf_prog
case BPF_PROG_TYPE_SOCKET_FILTER:
case BPF_PROG_TYPE_SCHED_CLS:
case BPF_PROG_TYPE_SCHED_ACT:
+ case BPF_PROG_TYPE_CGROUP_SKB:
return true;
default:
return false;