Commit ab861dfc authored by Daniel Jurgens's avatar Daniel Jurgens Committed by Paul Moore
Browse files

selinux: Add IB Port SMP access vector 



Add a type for Infiniband ports and an access vector for subnet
management packets. Implement the ib_port_smp hook to check that the
caller has permission to send and receive SMPs on the end port specified
by the device name and port. Add interface to query the SID for a IB
port, which walks the IB_PORT ocontexts to find an entry for the
given name and port.

Signed-off-by: default avatarDaniel Jurgens <danielj@mellanox.com>
Reviewed-by: default avatarJames Morris <james.l.morris@oracle.com>
Acked-by: default avatarDoug Ledford <dledford@redhat.com>
Signed-off-by: default avatarPaul Moore <paul@paul-moore.com>
parent cfc4d882

include/linux/lsm_audit.h

+8 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/path.h>

#include <linux/key.h>

#include <linux/skbuff.h>

#include <rdma/ib_verbs.h>



struct lsm_network_audit {

	int netif;
@@ -50,6 +51,11 @@ struct lsm_ibpkey_audit { 
	u16	pkey;

};



struct lsm_ibendport_audit {

	char	dev_name[IB_DEVICE_NAME_MAX];

	u8	port;

};



/* Auxiliary data to use in generating the audit record. */

struct common_audit_data {

	char type;
@@ -66,6 +72,7 @@ struct common_audit_data { 
#define LSM_AUDIT_DATA_IOCTL_OP	11

#define LSM_AUDIT_DATA_FILE	12

#define LSM_AUDIT_DATA_IBPKEY	13

#define LSM_AUDIT_DATA_IBENDPORT 14

	union 	{

		struct path path;

		struct dentry *dentry;
@@ -84,6 +91,7 @@ struct common_audit_data { 
		struct lsm_ioctlop_audit *op;

		struct file *file;

		struct lsm_ibpkey_audit *ibpkey;

		struct lsm_ibendport_audit *ibendport;

	} u;

	/* this union contains LSM specific data */

	union {

security/lsm_audit.c

+5 −0
Original line number Diff line number Diff line
@@ -421,6 +421,11 @@ static void dump_common_audit_data(struct audit_buffer *ab, 
				 a->u.ibpkey->pkey, &sbn_pfx);

		break;

	}

	case LSM_AUDIT_DATA_IBENDPORT:

		audit_log_format(ab, " device=%s port_num=%u",

				 a->u.ibendport->dev_name,

				 a->u.ibendport->port);

		break;

	} /* switch (a->type) */

}

security/selinux/hooks.c

+25 −0
Original line number Diff line number Diff line
@@ -6169,6 +6169,29 @@ static int selinux_ib_pkey_access(void *ib_sec, u64 subnet_prefix, u16 pkey_val) 
			    INFINIBAND_PKEY__ACCESS, &ad);

}



static int selinux_ib_endport_manage_subnet(void *ib_sec, const char *dev_name,

					    u8 port_num)

{

	struct common_audit_data ad;

	int err;

	u32 sid = 0;

	struct ib_security_struct *sec = ib_sec;

	struct lsm_ibendport_audit ibendport;



	err = security_ib_endport_sid(dev_name, port_num, &sid);



	if (err)

		return err;



	ad.type = LSM_AUDIT_DATA_IBENDPORT;

	strncpy(ibendport.dev_name, dev_name, sizeof(ibendport.dev_name));

	ibendport.port = port_num;

	ad.u.ibendport = &ibendport;

	return avc_has_perm(sec->sid, sid,

			    SECCLASS_INFINIBAND_ENDPORT,

			    INFINIBAND_ENDPORT__MANAGE_SUBNET, &ad);

}



static int selinux_ib_alloc_security(void **ib_sec)

{

	struct ib_security_struct *sec;
@@ -6374,6 +6397,8 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = { 
	LSM_HOOK_INIT(tun_dev_open, selinux_tun_dev_open),

#ifdef CONFIG_SECURITY_INFINIBAND

	LSM_HOOK_INIT(ib_pkey_access, selinux_ib_pkey_access),

	LSM_HOOK_INIT(ib_endport_manage_subnet,

		      selinux_ib_endport_manage_subnet),

	LSM_HOOK_INIT(ib_alloc_security, selinux_ib_alloc_security),

	LSM_HOOK_INIT(ib_free_security, selinux_ib_free_security),

#endif

security/selinux/include/classmap.h

+2 −0
Original line number Diff line number Diff line
@@ -233,6 +233,8 @@ struct security_class_mapping secclass_map[] = { 
	  { COMMON_SOCK_PERMS, NULL } },

	{ "infiniband_pkey",

	  { "access", NULL } },

	{ "infiniband_endport",

	  { "manage_subnet", NULL } },

	{ NULL }

  };

security/selinux/include/security.h

+2 −0
Original line number Diff line number Diff line
@@ -183,6 +183,8 @@ int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 


int security_ib_pkey_sid(u64 subnet_prefix, u16 pkey_num, u32 *out_sid);



int security_ib_endport_sid(const char *dev_name, u8 port_num, u32 *out_sid);



int security_netif_sid(char *name, u32 *if_sid);



int security_node_sid(u16 domain, void *addr, u32 addrlen,

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