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smack: provide socketpair callback

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Make sure to implement the new socketpair callback so the SO_PEERSEC
call on socketpair(2)s will return correct information.

Signed-off-by: Tom Gundersen <teg@jklm.no>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
This commit is contained in:
Tom Gundersen 2018-05-04 16:28:22 +02:00 committed by James Morris
parent 0b811db2cb
commit 5859cdf550
1 changed files with 22 additions and 0 deletions
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22
security/smack/smack_lsm.c
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@ -2842,6 +2842,27 @@ static int smack_socket_post_create(struct socket *sock, int family,
return smack_netlabel(sock->sk, SMACK_CIPSO_SOCKET);
}
/**
* smack_socket_socketpair - create socket pair
* @socka: one socket
* @sockb: another socket
*
* Cross reference the peer labels for SO_PEERSEC
*
* Returns 0 on success, and error code otherwise
*/
static int smack_socket_socketpair(struct socket *socka,
struct socket *sockb)
{
struct socket_smack *asp = socka->sk->sk_security;
struct socket_smack *bsp = sockb->sk->sk_security;
asp->smk_packet = bsp->smk_out;
bsp->smk_packet = asp->smk_out;
return 0;
}
#ifdef SMACK_IPV6_PORT_LABELING
/**
* smack_socket_bind - record port binding information.
@ -4724,6 +4745,7 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(unix_may_send, smack_unix_may_send),
LSM_HOOK_INIT(socket_post_create, smack_socket_post_create),
LSM_HOOK_INIT(socket_socketpair, smack_socket_socketpair),
#ifdef SMACK_IPV6_PORT_LABELING
LSM_HOOK_INIT(socket_bind, smack_socket_bind),
#endif