diff options
| author | Robert Love <rlove@google.com> | 2008-10-15 15:35:44 -0400 |
|---|---|---|
| committer | Colin Cross <ccross@android.com> | 2012-04-09 13:53:14 -0700 |
| commit | 2038692b9acf7ae3054a35e879039ff062316bf0 (patch) | |
| tree | c0ac7f6245ec55f48eade0c9d0529466a573b1e2 /net/ipv4 | |
| parent | d92aa582e4cf5c378defc14b892ae056c9db65b6 (diff) | |
Paranoid network.
With CONFIG_ANDROID_PARANOID_NETWORK, require specific uids/gids to instantiate
network sockets.
Signed-off-by: Robert Love <rlove@google.com>
paranoid networking: Use in_egroup_p() to check group membership
The previous group_search() caused trouble for partners with module builds.
in_egroup_p() is also cleaner.
Signed-off-by: Nick Pelly <npelly@google.com>
Fix 2.6.29 build.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
net: Fix compilation of the IPv6 module
Fix compilation of the IPv6 module -- current->euid does not exist anymore,
current_euid() is what needs to be used.
Signed-off-by: Steinar H. Gunderson <sesse@google.com>
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 10e3751466b..5ec46eb05b7 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -119,6 +119,9 @@ #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. @@ -259,6 +262,29 @@ 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. */ @@ -275,6 +301,9 @@ 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(); @@ -327,7 +356,7 @@ 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; |