diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 4cafe6a19167..be5817df0a9d 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -4576,6 +4576,7 @@ static int selinux_socket_post_create(struct socket *sock, int family, static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) { struct sock *sk = sock->sk; + struct sk_security_struct *sksec = sk->sk_security; u16 family; int err; @@ -4587,11 +4588,11 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in family = sk->sk_family; if (family == PF_INET || family == PF_INET6) { char *addrp; - struct sk_security_struct *sksec = sk->sk_security; struct common_audit_data ad; struct lsm_network_audit net = {0,}; struct sockaddr_in *addr4 = NULL; struct sockaddr_in6 *addr6 = NULL; + u16 family_sa = address->sa_family; unsigned short snum; u32 sid, node_perm; @@ -4601,11 +4602,20 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in * need to check address->sa_family as it is possible to have * sk->sk_family = PF_INET6 with addr->sa_family = AF_INET. */ - switch (address->sa_family) { + switch (family_sa) { + case AF_UNSPEC: case AF_INET: if (addrlen < sizeof(struct sockaddr_in)) return -EINVAL; addr4 = (struct sockaddr_in *)address; + if (family_sa == AF_UNSPEC) { + /* see __inet_bind(), we only want to allow + * AF_UNSPEC if the address is INADDR_ANY + */ + if (addr4->sin_addr.s_addr != htonl(INADDR_ANY)) + goto err_af; + family_sa = AF_INET; + } snum = ntohs(addr4->sin_port); addrp = (char *)&addr4->sin_addr.s_addr; break; @@ -4617,15 +4627,14 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in addrp = (char *)&addr6->sin6_addr.s6_addr; break; default: - /* Note that SCTP services expect -EINVAL, whereas - * others expect -EAFNOSUPPORT. - */ - if (sksec->sclass == SECCLASS_SCTP_SOCKET) - return -EINVAL; - else - return -EAFNOSUPPORT; + goto err_af; } + ad.type = LSM_AUDIT_DATA_NET; + ad.u.net = &net; + ad.u.net->sport = htons(snum); + ad.u.net->family = family_sa; + if (snum) { int low, high; @@ -4637,10 +4646,6 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in snum, &sid); if (err) goto out; - ad.type = LSM_AUDIT_DATA_NET; - ad.u.net = &net; - ad.u.net->sport = htons(snum); - ad.u.net->family = family; err = avc_has_perm(&selinux_state, sksec->sid, sid, sksec->sclass, @@ -4672,16 +4677,11 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in break; } - err = sel_netnode_sid(addrp, family, &sid); + err = sel_netnode_sid(addrp, family_sa, &sid); if (err) goto out; - ad.type = LSM_AUDIT_DATA_NET; - ad.u.net = &net; - ad.u.net->sport = htons(snum); - ad.u.net->family = family; - - if (address->sa_family == AF_INET) + if (family_sa == AF_INET) ad.u.net->v4info.saddr = addr4->sin_addr.s_addr; else ad.u.net->v6info.saddr = addr6->sin6_addr; @@ -4694,6 +4694,11 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in } out: return err; +err_af: + /* Note that SCTP services expect -EINVAL, others -EAFNOSUPPORT. */ + if (sksec->sclass == SECCLASS_SCTP_SOCKET) + return -EINVAL; + return -EAFNOSUPPORT; } /* This supports connect(2) and SCTP connect services such as sctp_connectx(3) @@ -4771,7 +4776,7 @@ static int selinux_socket_connect_helper(struct socket *sock, ad.type = LSM_AUDIT_DATA_NET; ad.u.net = &net; ad.u.net->dport = htons(snum); - ad.u.net->family = sk->sk_family; + ad.u.net->family = address->sa_family; err = avc_has_perm(&selinux_state, sksec->sid, sid, sksec->sclass, perm, &ad); if (err) @@ -5272,6 +5277,7 @@ static int selinux_sctp_bind_connect(struct sock *sk, int optname, while (walk_size < addrlen) { addr = addr_buf; switch (addr->sa_family) { + case AF_UNSPEC: case AF_INET: len = sizeof(struct sockaddr_in); break; @@ -5279,7 +5285,7 @@ static int selinux_sctp_bind_connect(struct sock *sk, int optname, len = sizeof(struct sockaddr_in6); break; default: - return -EAFNOSUPPORT; + return -EINVAL; } err = -EINVAL;