diff options
author | Robert Love <rlove@google.com> | 2008-10-15 15:35:44 -0400 |
---|---|---|
committer | Colin Cross <ccross@android.com> | 2011-06-14 09:08:47 -0700 |
commit | 8affb4e2680f7b11294f67ba6cd6f539ba543846 (patch) | |
tree | cc4039c2166ce9acd8f37611513bf100e40e5b29 | |
parent | 6a4e6432fc9e6e00cf295987c4e5e19d4d5bd9cd (diff) | |
download | kernel_samsung_espresso10-8affb4e2680f7b11294f67ba6cd6f539ba543846.zip kernel_samsung_espresso10-8affb4e2680f7b11294f67ba6cd6f539ba543846.tar.gz kernel_samsung_espresso10-8affb4e2680f7b11294f67ba6cd6f539ba543846.tar.bz2 |
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>
-rw-r--r-- | net/Kconfig | 6 | ||||
-rw-r--r-- | net/bluetooth/af_bluetooth.c | 38 | ||||
-rw-r--r-- | net/ipv4/af_inet.c | 31 | ||||
-rw-r--r-- | net/ipv6/af_inet6.c | 32 |
4 files changed, 105 insertions, 2 deletions
diff --git a/net/Kconfig b/net/Kconfig index 878151c..f2856d7 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -79,6 +79,12 @@ source "net/netlabel/Kconfig" endif # if INET +config ANDROID_PARANOID_NETWORK + bool "Only allow certain groups to create sockets" + default y + help + none + config NETWORK_SECMARK bool "Security Marking" help diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c index 8add9b4..e87d15d 100644 --- a/net/bluetooth/af_bluetooth.c +++ b/net/bluetooth/af_bluetooth.c @@ -40,6 +40,15 @@ #include <net/bluetooth/bluetooth.h> +#ifdef CONFIG_ANDROID_PARANOID_NETWORK +#include <linux/android_aid.h> +#endif + +#ifndef CONFIG_BT_SOCK_DEBUG +#undef BT_DBG +#define BT_DBG(D...) +#endif + #define VERSION "2.16" /* Bluetooth sockets */ @@ -125,11 +134,40 @@ int bt_sock_unregister(int proto) } EXPORT_SYMBOL(bt_sock_unregister); +#ifdef CONFIG_ANDROID_PARANOID_NETWORK +static inline int current_has_bt_admin(void) +{ + return (!current_euid() || in_egroup_p(AID_NET_BT_ADMIN)); +} + +static inline int current_has_bt(void) +{ + return (current_has_bt_admin() || in_egroup_p(AID_NET_BT)); +} +# else +static inline int current_has_bt_admin(void) +{ + return 1; +} + +static inline int current_has_bt(void) +{ + return 1; +} +#endif + static int bt_sock_create(struct net *net, struct socket *sock, int proto, int kern) { int err; + if (proto == BTPROTO_RFCOMM || proto == BTPROTO_SCO || + proto == BTPROTO_L2CAP) { + if (!current_has_bt()) + return -EPERM; + } else if (!current_has_bt_admin()) + return -EPERM; + if (net != &init_net) return -EAFNOSUPPORT; diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 9c19260..5683c8f 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; diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index d450a2f..4384e2b 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -63,6 +63,10 @@ #include <asm/system.h> #include <linux/mroute6.h> +#ifdef CONFIG_ANDROID_PARANOID_NETWORK +#include <linux/android_aid.h> +#endif + MODULE_AUTHOR("Cast of dozens"); MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); MODULE_LICENSE("GPL"); @@ -96,6 +100,29 @@ static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) return (struct ipv6_pinfo *)(((u8 *)sk) + offset); } +#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 + static int inet6_create(struct net *net, struct socket *sock, int protocol, int kern) { @@ -109,6 +136,9 @@ 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) @@ -160,7 +190,7 @@ 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; sock->ops = answer->ops; |