From 1fc993975443981f319cd43090464473c4e17df9 Mon Sep 17 00:00:00 2001 From: Dmitry Yakunin Date: Mon, 3 Aug 2020 12:05:44 +0300 Subject: [PATCH] UPSTREAM: bpf: Setup socket family and addresses in bpf_prog_test_run_skb Now it's impossible to test all branches of cgroup_skb bpf program which accesses skb->family and skb->{local,remote}_ip{4,6} fields because they are zeroed during socket allocation. This commit fills socket family and addresses from related fields in constructed skb. Change-Id: Ifd442fcc00f8372d57c453808fdbc7aad7ef9628 Signed-off-by: Dmitry Yakunin Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20200803090545.82046-2-zeil@yandex-team.ru --- net/bpf/test_run.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index 24b479237d69..0a9ff221506a 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -450,6 +450,27 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, skb->protocol = eth_type_trans(skb, current->nsproxy->net_ns->loopback_dev); skb_reset_network_header(skb); + switch (skb->protocol) { + case htons(ETH_P_IP): + sk->sk_family = AF_INET; + if (sizeof(struct iphdr) <= skb_headlen(skb)) { + sk->sk_rcv_saddr = ip_hdr(skb)->saddr; + sk->sk_daddr = ip_hdr(skb)->daddr; + } + break; +#if IS_ENABLED(CONFIG_IPV6) + case htons(ETH_P_IPV6): + sk->sk_family = AF_INET6; + if (sizeof(struct ipv6hdr) <= skb_headlen(skb)) { + sk->sk_v6_rcv_saddr = ipv6_hdr(skb)->saddr; + sk->sk_v6_daddr = ipv6_hdr(skb)->daddr; + } + break; +#endif + default: + break; + } + if (is_l2) __skb_push(skb, hh_len); if (is_direct_pkt_access)