[PATCH bpf] bpf: fix the check that forwarding is enabled in bpf_ipv6_fib_lookup

[Anton Protopopov]

The bpf_ipv6_fib_lookup function should return BPF_FIB_LKUP_RET_FWD_DISABLED
when forwarding is disabled for the input device.  However instead of checking
if forwarding is enabled on the input device, it checked the global
net->ipv6.devconf_all->forwarding flag.  Change it to behave as expected.

Signed-off-by: Anton Protopopov <a.s.protopo...@gmail.com>
---
 net/core/filter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/filter.c b/net/core/filter.c
index f615e42cf4ef..3fdf1b21be36 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -4737,7 +4737,7 @@ static int bpf_ipv6_fib_lookup(struct net *net, struct 
bpf_fib_lookup *params,
                return -ENODEV;
 
        idev = __in6_dev_get_safely(dev);
-       if (unlikely(!idev || !net->ipv6.devconf_all->forwarding))
+       if (unlikely(!idev || !idev->cnf.forwarding))
                return BPF_FIB_LKUP_RET_FWD_DISABLED;
 
        if (flags & BPF_FIB_LOOKUP_OUTPUT) {
-- 
2.19.1