From: Anton Protopopov <a.s.protopopov@gmail.com> [ Upstream commit 56f0f84e69c7a7f229dfa524b13b0ceb6ce9b09e ] 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. Fixes: 87f5fc7e48dd ("bpf: Provide helper to do forwarding lookups in kernel FIB table") Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Yang Yingliang <yangyingliang@huawei.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 571fca7..453d9fd 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4373,7 +4373,7 @@ 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) { -- 1.8.3