diff options
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/af_inet.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index dd2b9478ddd1..dac2c6b7c9e6 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -118,6 +118,9 @@ #include <linux/mroute.h> #endif +#ifdef CONFIG_ANDROID_PARANOID_NETWORK +#include <linux/android_aid.h> +#endif /* The inetsw table contains everything that inet_create needs to * build a new socket. @@ -258,6 +261,29 @@ static inline int inet_netns_ok(struct net *net, int protocol) return ipprot->netns_ok; } +#ifdef CONFIG_ANDROID_PARANOID_NETWORK +static inline int current_has_network(void) +{ + return (!current_euid() || in_egroup_p(AID_INET) || + in_egroup_p(AID_NET_RAW)); +} +static inline int current_has_cap(int cap) +{ + if (cap == CAP_NET_RAW && in_egroup_p(AID_NET_RAW)) + return 1; + return capable(cap); +} +# else +static inline int current_has_network(void) +{ + return 1; +} +static inline int current_has_cap(int cap) +{ + return capable(cap); +} +#endif + /* * Create an inet socket. */ @@ -274,6 +300,9 @@ static int inet_create(struct net *net, struct socket *sock, int protocol, int try_loading_module = 0; int err; + if (!current_has_network()) + return -EACCES; + if (unlikely(!inet_ehash_secret)) if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM) build_ehash_secret(); @@ -326,7 +355,7 @@ lookup_protocol: } err = -EPERM; - if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) + if (sock->type == SOCK_RAW && !kern && !current_has_cap(CAP_NET_RAW)) goto out_rcu_unlock; err = -EAFNOSUPPORT; |