diff options
Diffstat (limited to 'net/bpf/test_run.c')
| -rw-r--r-- | net/bpf/test_run.c | 62 |
1 files changed, 59 insertions, 3 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index bfd4ccd80847..99eb8c6c0fbc 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -147,6 +147,20 @@ int noinline bpf_fentry_test6(u64 a, void *b, short c, int d, void *e, u64 f) return a + (long)b + c + d + (long)e + f; } +struct bpf_fentry_test_t { + struct bpf_fentry_test_t *a; +}; + +int noinline bpf_fentry_test7(struct bpf_fentry_test_t *arg) +{ + return (long)arg; +} + +int noinline bpf_fentry_test8(struct bpf_fentry_test_t *arg) +{ + return (long)arg->a; +} + int noinline bpf_modify_return_test(int a, int *b) { *b += 1; @@ -185,6 +199,7 @@ int bpf_prog_test_run_tracing(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr) { + struct bpf_fentry_test_t arg = {}; u16 side_effect = 0, ret = 0; int b = 2, err = -EFAULT; u32 retval = 0; @@ -197,7 +212,9 @@ int bpf_prog_test_run_tracing(struct bpf_prog *prog, bpf_fentry_test3(4, 5, 6) != 15 || bpf_fentry_test4((void *)7, 8, 9, 10) != 34 || bpf_fentry_test5(11, (void *)12, 13, 14, 15) != 65 || - bpf_fentry_test6(16, (void *)17, 18, 19, (void *)20, 21) != 111) + bpf_fentry_test6(16, (void *)17, 18, 19, (void *)20, 21) != 111 || + bpf_fentry_test7((struct bpf_fentry_test_t *)0) != 0 || + bpf_fentry_test8(&arg) != 0) goto out; break; case BPF_MODIFY_RETURN: @@ -310,6 +327,12 @@ static int convert___skb_to_skb(struct sk_buff *skb, struct __sk_buff *__skb) /* priority is allowed */ if (!range_is_zero(__skb, offsetofend(struct __sk_buff, priority), + offsetof(struct __sk_buff, ifindex))) + return -EINVAL; + + /* ifindex is allowed */ + + if (!range_is_zero(__skb, offsetofend(struct __sk_buff, ifindex), offsetof(struct __sk_buff, cb))) return -EINVAL; @@ -364,6 +387,7 @@ static void convert_skb_to___skb(struct sk_buff *skb, struct __sk_buff *__skb) __skb->mark = skb->mark; __skb->priority = skb->priority; + __skb->ifindex = skb->dev->ifindex; __skb->tstamp = skb->tstamp; memcpy(__skb->cb, &cb->data, QDISC_CB_PRIV_LEN); __skb->wire_len = cb->pkt_len; @@ -374,6 +398,8 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr) { bool is_l2 = false, is_direct_pkt_access = false; + struct net *net = current->nsproxy->net_ns; + struct net_device *dev = net->loopback_dev; u32 size = kattr->test.data_size_in; u32 repeat = kattr->test.repeat; struct __sk_buff *ctx = NULL; @@ -415,7 +441,7 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, kfree(ctx); return -ENOMEM; } - sock_net_set(sk, current->nsproxy->net_ns); + sock_net_set(sk, net); sock_init_data(NULL, sk); skb = build_skb(data, 0); @@ -429,9 +455,37 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); __skb_put(skb, size); - skb->protocol = eth_type_trans(skb, current->nsproxy->net_ns->loopback_dev); + if (ctx && ctx->ifindex > 1) { + dev = dev_get_by_index(net, ctx->ifindex); + if (!dev) { + ret = -ENODEV; + goto out; + } + } + skb->protocol = eth_type_trans(skb, 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) @@ -464,6 +518,8 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, ret = bpf_ctx_finish(kattr, uattr, ctx, sizeof(struct __sk_buff)); out: + if (dev && dev != net->loopback_dev) + dev_put(dev); kfree_skb(skb); bpf_sk_storage_free(sk); kfree(sk); |