diff options
| -rw-r--r-- | security/smack/smack.h | 1 | ||||
| -rw-r--r-- | security/smack/smack_lsm.c | 20 |
2 files changed, 21 insertions, 0 deletions
diff --git a/security/smack/smack.h b/security/smack/smack.h index 73480ee07478..2fac3b5bf44a 100644 --- a/security/smack/smack.h +++ b/security/smack/smack.h @@ -174,6 +174,7 @@ struct smk_port_label { struct smack_known *smk_in; /* inbound label */ struct smack_known *smk_out; /* outgoing label */ short smk_sock_type; /* Socket type */ + short smk_can_reuse; }; #endif /* SMACK_IPV6_PORT_LABELING */ diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 5e4d2bdb38cb..ed6885bccec4 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -2354,6 +2354,20 @@ static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags) */ static void smack_sk_free_security(struct sock *sk) { +#ifdef SMACK_IPV6_PORT_LABELING + struct smk_port_label *spp; + + if (sk->sk_family == PF_INET6) { + rcu_read_lock(); + list_for_each_entry_rcu(spp, &smk_ipv6_port_list, list) { + if (spp->smk_sock != sk) + continue; + spp->smk_can_reuse = 1; + break; + } + rcu_read_unlock(); + } +#endif kfree(sk->sk_security); } @@ -2637,10 +2651,15 @@ static void smk_ipv6_port_label(struct socket *sock, struct sockaddr *address) list_for_each_entry_rcu(spp, &smk_ipv6_port_list, list) { if (spp->smk_port != port || spp->smk_sock_type != sock->type) continue; + if (spp->smk_can_reuse != 1) { + rcu_read_unlock(); + return; + } spp->smk_port = port; spp->smk_sock = sk; spp->smk_in = ssp->smk_in; spp->smk_out = ssp->smk_out; + spp->smk_can_reuse = 0; rcu_read_unlock(); return; } @@ -2657,6 +2676,7 @@ static void smk_ipv6_port_label(struct socket *sock, struct sockaddr *address) spp->smk_in = ssp->smk_in; spp->smk_out = ssp->smk_out; spp->smk_sock_type = sock->type; + spp->smk_can_reuse = 0; mutex_lock(&smack_ipv6_lock); list_add_rcu(&spp->list, &smk_ipv6_port_list); |