diff options
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/af_inet6.c | 37 | ||||
| -rw-r--r-- | net/ipv6/exthdrs_core.c | 13 | ||||
| -rw-r--r-- | net/ipv6/netfilter/Kconfig | 12 | ||||
| -rw-r--r-- | net/ipv6/netfilter/ip6t_REJECT.c | 9 |
4 files changed, 64 insertions, 7 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index ab5c7ad482c..ebf231016b1 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -62,6 +62,20 @@ #include <asm/uaccess.h> #include <linux/mroute6.h> +#ifdef CONFIG_ANDROID_PARANOID_NETWORK +#include <linux/android_aid.h> + +static inline int current_has_network(void) +{ + return in_egroup_p(AID_INET) || capable(CAP_NET_RAW); +} +#else +static inline int current_has_network(void) +{ + return 1; +} +#endif + MODULE_AUTHOR("Cast of dozens"); MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); MODULE_LICENSE("GPL"); @@ -108,6 +122,9 @@ static int inet6_create(struct net *net, struct socket *sock, int protocol, int try_loading_module = 0; int err; + if (!current_has_network()) + return -EACCES; + if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM && !inet_ehash_secret) @@ -159,8 +176,7 @@ lookup_protocol: } err = -EPERM; - if (sock->type == SOCK_RAW && !kern && - !ns_capable(net->user_ns, CAP_NET_RAW)) + if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) goto out_rcu_unlock; sock->ops = answer->ops; @@ -477,6 +493,21 @@ int inet6_getname(struct socket *sock, struct sockaddr *uaddr, } EXPORT_SYMBOL(inet6_getname); +int inet6_killaddr_ioctl(struct net *net, void __user *arg) { + struct in6_ifreq ireq; + struct sockaddr_in6 sin6; + + if (!capable(CAP_NET_ADMIN)) + return -EACCES; + + if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) + return -EFAULT; + + sin6.sin6_family = AF_INET6; + sin6.sin6_addr = ireq.ifr6_addr; + return tcp_nuke_addr(net, (struct sockaddr *) &sin6); +} + int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { struct sock *sk = sock->sk; @@ -500,6 +531,8 @@ int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) return addrconf_del_ifaddr(net, (void __user *) arg); case SIOCSIFDSTADDR: return addrconf_set_dstaddr(net, (void __user *) arg); + case SIOCKILLADDR: + return inet6_killaddr_ioctl(net, (void __user *) arg); default: if (!sk->sk_prot->ioctl) return -ENOIOCTLCMD; diff --git a/net/ipv6/exthdrs_core.c b/net/ipv6/exthdrs_core.c index c5e83fae4df..23eed2365fe 100644 --- a/net/ipv6/exthdrs_core.c +++ b/net/ipv6/exthdrs_core.c @@ -166,15 +166,15 @@ EXPORT_SYMBOL_GPL(ipv6_find_tlv); * to explore inner IPv6 header, eg. ICMPv6 error messages. * * If target header is found, its offset is set in *offset and return protocol - * number. Otherwise, return -1. + * number. Otherwise, return -ENOENT or -EBADMSG. * * If the first fragment doesn't contain the final protocol header or * NEXTHDR_NONE it is considered invalid. * * Note that non-1st fragment is special case that "the protocol number * of last header" is "next header" field in Fragment header. In this case, - * *offset is meaningless and fragment offset is stored in *fragoff if fragoff - * isn't NULL. + * *offset is meaningless. If fragoff is not NULL, the fragment offset is + * stored in *fragoff; if it is NULL, return -EINVAL. * * if flags is not NULL and it's a fragment, then the frag flag * IP6_FH_F_FRAG will be set. If it's an AH header, the @@ -253,9 +253,12 @@ int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, if (target < 0 && ((!ipv6_ext_hdr(hp->nexthdr)) || hp->nexthdr == NEXTHDR_NONE)) { - if (fragoff) + if (fragoff) { *fragoff = _frag_off; - return hp->nexthdr; + return hp->nexthdr; + } else { + return -EINVAL; + } } return -ENOENT; } diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig index 4433ab40e7d..7f45af3e812 100644 --- a/net/ipv6/netfilter/Kconfig +++ b/net/ipv6/netfilter/Kconfig @@ -153,6 +153,18 @@ config IP6_NF_TARGET_REJECT To compile it as a module, choose M here. If unsure, say N. +config IP6_NF_TARGET_REJECT_SKERR + bool "Force socket error when rejecting with icmp*" + depends on IP6_NF_TARGET_REJECT + default n + help + This option enables turning a "--reject-with icmp*" into a matching + socket error also. + The REJECT target normally allows sending an ICMP message. But it + leaves the local socket unaware of any ingress rejects. + + If unsure, say N. + config IP6_NF_MANGLE tristate "Packet mangling" default m if NETFILTER_ADVANCED=n diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c index 70f9abc0efe..573c232239b 100644 --- a/net/ipv6/netfilter/ip6t_REJECT.c +++ b/net/ipv6/netfilter/ip6t_REJECT.c @@ -180,6 +180,15 @@ send_unreach(struct net *net, struct sk_buff *skb_in, unsigned char code, skb_in->dev = net->loopback_dev; icmpv6_send(skb_in, ICMPV6_DEST_UNREACH, code, 0); +#ifdef CONFIG_IP6_NF_TARGET_REJECT_SKERR + if (skb_in->sk) { + icmpv6_err_convert(ICMPV6_DEST_UNREACH, code, + &skb_in->sk->sk_err); + skb_in->sk->sk_error_report(skb_in->sk); + pr_debug("ip6t_REJECT: sk_err=%d for skb=%p sk=%p\n", + skb_in->sk->sk_err, skb_in, skb_in->sk); + } +#endif } static unsigned int |