[linux-block.git] / security / lsm_audit.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * common LSM auditing functions
 *
 * Based on code written for SELinux by :
 *			Stephen Smalley, <sds@tycho.nsa.gov>
 * 			James Morris <jmorris@redhat.com>
 * Author : Etienne Basset, <etienne.basset@ensta.org>
 */

#include <linux/types.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/gfp.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <net/sock.h>
#include <linux/un.h>
#include <net/af_unix.h>
#include <linux/audit.h>
#include <linux/ipv6.h>
#include <linux/ip.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/dccp.h>
#include <linux/sctp.h>
#include <linux/lsm_audit.h>
#include <linux/security.h>

/**
 * ipv4_skb_to_auditdata : fill auditdata from skb
 * @skb : the skb
 * @ad : the audit data to fill
 * @proto : the layer 4 protocol
 *
 * return  0 on success
 */
int ipv4_skb_to_auditdata(struct sk_buff *skb,
		struct common_audit_data *ad, u8 *proto)
{
	int ret = 0;
	struct iphdr *ih;

	ih = ip_hdr(skb);
	ad->u.net->v4info.saddr = ih->saddr;
	ad->u.net->v4info.daddr = ih->daddr;

	if (proto)
		*proto = ih->protocol;
	/* non initial fragment */
	if (ntohs(ih->frag_off) & IP_OFFSET)
		return 0;

	switch (ih->protocol) {
	case IPPROTO_TCP: {
		struct tcphdr *th = tcp_hdr(skb);

		ad->u.net->sport = th->source;
		ad->u.net->dport = th->dest;
		break;
	}
	case IPPROTO_UDP: {
		struct udphdr *uh = udp_hdr(skb);

		ad->u.net->sport = uh->source;
		ad->u.net->dport = uh->dest;
		break;
	}
	case IPPROTO_DCCP: {
		struct dccp_hdr *dh = dccp_hdr(skb);

		ad->u.net->sport = dh->dccph_sport;
		ad->u.net->dport = dh->dccph_dport;
		break;
	}
	case IPPROTO_SCTP: {
		struct sctphdr *sh = sctp_hdr(skb);

		ad->u.net->sport = sh->source;
		ad->u.net->dport = sh->dest;
		break;
	}
	default:
		ret = -EINVAL;
	}
	return ret;
}
#if IS_ENABLED(CONFIG_IPV6)
/**
 * ipv6_skb_to_auditdata : fill auditdata from skb
 * @skb : the skb
 * @ad : the audit data to fill
 * @proto : the layer 4 protocol
 *
 * return  0 on success
 */
int ipv6_skb_to_auditdata(struct sk_buff *skb,
		struct common_audit_data *ad, u8 *proto)
{
	int offset, ret = 0;
	struct ipv6hdr *ip6;
	u8 nexthdr;
	__be16 frag_off;

	ip6 = ipv6_hdr(skb);
	ad->u.net->v6info.saddr = ip6->saddr;
	ad->u.net->v6info.daddr = ip6->daddr;
	/* IPv6 can have several extension header before the Transport header
	 * skip them */
	offset = skb_network_offset(skb);
	offset += sizeof(*ip6);
	nexthdr = ip6->nexthdr;
	offset = ipv6_skip_exthdr(skb, offset, &nexthdr, &frag_off);
	if (offset < 0)
		return 0;
	if (proto)
		*proto = nexthdr;
	switch (nexthdr) {
	case IPPROTO_TCP: {
		struct tcphdr _tcph, *th;

		th = skb_header_pointer(skb, offset, sizeof(_tcph), &_tcph);
		if (th == NULL)
			break;

		ad->u.net->sport = th->source;
		ad->u.net->dport = th->dest;
		break;
	}
	case IPPROTO_UDP: {
		struct udphdr _udph, *uh;

		uh = skb_header_pointer(skb, offset, sizeof(_udph), &_udph);
		if (uh == NULL)
			break;

		ad->u.net->sport = uh->source;
		ad->u.net->dport = uh->dest;
		break;
	}
	case IPPROTO_DCCP: {
		struct dccp_hdr _dccph, *dh;

		dh = skb_header_pointer(skb, offset, sizeof(_dccph), &_dccph);
		if (dh == NULL)
			break;

		ad->u.net->sport = dh->dccph_sport;
		ad->u.net->dport = dh->dccph_dport;
		break;
	}
	case IPPROTO_SCTP: {
		struct sctphdr _sctph, *sh;

		sh = skb_header_pointer(skb, offset, sizeof(_sctph), &_sctph);
		if (sh == NULL)
			break;
		ad->u.net->sport = sh->source;
		ad->u.net->dport = sh->dest;
		break;
	}
	default:
		ret = -EINVAL;
	}
	return ret;
}
#endif


static inline void print_ipv6_addr(struct audit_buffer *ab,
				   const struct in6_addr *addr, __be16 port,
				   char *name1, char *name2)
{
	if (!ipv6_addr_any(addr))
		audit_log_format(ab, " %s=%pI6c", name1, addr);
	if (port)
		audit_log_format(ab, " %s=%d", name2, ntohs(port));
}

static inline void print_ipv4_addr(struct audit_buffer *ab, __be32 addr,
				   __be16 port, char *name1, char *name2)
{
	if (addr)
		audit_log_format(ab, " %s=%pI4", name1, &addr);
	if (port)
		audit_log_format(ab, " %s=%d", name2, ntohs(port));
}

/**
 * dump_common_audit_data - helper to dump common audit data
 * @a : common audit data
 *
 */
static void dump_common_audit_data(struct audit_buffer *ab,
				   struct common_audit_data *a)
{
	char comm[sizeof(current->comm)];

	/*
	 * To keep stack sizes in check force programers to notice if they
	 * start making this union too large!  See struct lsm_network_audit
	 * as an example of how to deal with large data.
	 */
	BUILD_BUG_ON(sizeof(a->u) > sizeof(void *)*2);

	audit_log_format(ab, " pid=%d comm=", task_tgid_nr(current));
	audit_log_untrustedstring(ab, memcpy(comm, current->comm, sizeof(comm)));

	switch (a->type) {
	case LSM_AUDIT_DATA_NONE:
		return;
	case LSM_AUDIT_DATA_IPC:
		audit_log_format(ab, " ipc_key=%d ", a->u.ipc_id);
		break;
	case LSM_AUDIT_DATA_CAP:
		audit_log_format(ab, " capability=%d ", a->u.cap);
		break;
	case LSM_AUDIT_DATA_PATH: {
		struct inode *inode;

		audit_log_d_path(ab, " path=", &a->u.path);

		inode = d_backing_inode(a->u.path.dentry);
		if (inode) {
			audit_log_format(ab, " dev=");
			audit_log_untrustedstring(ab, inode->i_sb->s_id);
			audit_log_format(ab, " ino=%lu", inode->i_ino);
		}
		break;
	}
	case LSM_AUDIT_DATA_FILE: {
		struct inode *inode;

		audit_log_d_path(ab, " path=", &a->u.file->f_path);

		inode = file_inode(a->u.file);
		if (inode) {
			audit_log_format(ab, " dev=");
			audit_log_untrustedstring(ab, inode->i_sb->s_id);
			audit_log_format(ab, " ino=%lu", inode->i_ino);
		}
		break;
	}
	case LSM_AUDIT_DATA_IOCTL_OP: {
		struct inode *inode;

		audit_log_d_path(ab, " path=", &a->u.op->path);

		inode = a->u.op->path.dentry->d_inode;
		if (inode) {
			audit_log_format(ab, " dev=");
			audit_log_untrustedstring(ab, inode->i_sb->s_id);
			audit_log_format(ab, " ino=%lu", inode->i_ino);
		}

		audit_log_format(ab, " ioctlcmd=0x%hx", a->u.op->cmd);
		break;
	}
	case LSM_AUDIT_DATA_DENTRY: {
		struct inode *inode;

		audit_log_format(ab, " name=");
		spin_lock(&a->u.dentry->d_lock);
		audit_log_untrustedstring(ab, a->u.dentry->d_name.name);
		spin_unlock(&a->u.dentry->d_lock);

		inode = d_backing_inode(a->u.dentry);
		if (inode) {
			audit_log_format(ab, " dev=");
			audit_log_untrustedstring(ab, inode->i_sb->s_id);
			audit_log_format(ab, " ino=%lu", inode->i_ino);
		}
		break;
	}
	case LSM_AUDIT_DATA_INODE: {
		struct dentry *dentry;
		struct inode *inode;

		rcu_read_lock();
		inode = a->u.inode;
		dentry = d_find_alias_rcu(inode);
		if (dentry) {
			audit_log_format(ab, " name=");
			spin_lock(&dentry->d_lock);
			audit_log_untrustedstring(ab, dentry->d_name.name);
			spin_unlock(&dentry->d_lock);
		}
		audit_log_format(ab, " dev=");
		audit_log_untrustedstring(ab, inode->i_sb->s_id);
		audit_log_format(ab, " ino=%lu", inode->i_ino);
		rcu_read_unlock();
		break;
	}
	case LSM_AUDIT_DATA_TASK: {
		struct task_struct *tsk = a->u.tsk;
		if (tsk) {
			pid_t pid = task_tgid_nr(tsk);
			if (pid) {
				char comm[sizeof(tsk->comm)];
				audit_log_format(ab, " opid=%d ocomm=", pid);
				audit_log_untrustedstring(ab,
				    memcpy(comm, tsk->comm, sizeof(comm)));
			}
		}
		break;
	}
	case LSM_AUDIT_DATA_NET:
		if (a->u.net->sk) {
			const struct sock *sk = a->u.net->sk;
			struct unix_sock *u;
			struct unix_address *addr;
			int len = 0;
			char *p = NULL;

			switch (sk->sk_family) {
			case AF_INET: {
				struct inet_sock *inet = inet_sk(sk);

				print_ipv4_addr(ab, inet->inet_rcv_saddr,
						inet->inet_sport,
						"laddr", "lport");
				print_ipv4_addr(ab, inet->inet_daddr,
						inet->inet_dport,
						"faddr", "fport");
				break;
			}
#if IS_ENABLED(CONFIG_IPV6)
			case AF_INET6: {
				struct inet_sock *inet = inet_sk(sk);

				print_ipv6_addr(ab, &sk->sk_v6_rcv_saddr,
						inet->inet_sport,
						"laddr", "lport");
				print_ipv6_addr(ab, &sk->sk_v6_daddr,
						inet->inet_dport,
						"faddr", "fport");
				break;
			}
#endif
			case AF_UNIX:
				u = unix_sk(sk);
				addr = smp_load_acquire(&u->addr);
				if (!addr)
					break;
				if (u->path.dentry) {
					audit_log_d_path(ab, " path=", &u->path);
					break;
				}
				len = addr->len-sizeof(short);
				p = &addr->name->sun_path[0];
				audit_log_format(ab, " path=");
				if (*p)
					audit_log_untrustedstring(ab, p);
				else
					audit_log_n_hex(ab, p, len);
				break;
			}
		}

		switch (a->u.net->family) {
		case AF_INET:
			print_ipv4_addr(ab, a->u.net->v4info.saddr,
					a->u.net->sport,
					"saddr", "src");
			print_ipv4_addr(ab, a->u.net->v4info.daddr,
					a->u.net->dport,
					"daddr", "dest");
			break;
		case AF_INET6:
			print_ipv6_addr(ab, &a->u.net->v6info.saddr,
					a->u.net->sport,
					"saddr", "src");
			print_ipv6_addr(ab, &a->u.net->v6info.daddr,
					a->u.net->dport,
					"daddr", "dest");
			break;
		}
		if (a->u.net->netif > 0) {
			struct net_device *dev;

			/* NOTE: we always use init's namespace */
			dev = dev_get_by_index(&init_net, a->u.net->netif);
			if (dev) {
				audit_log_format(ab, " netif=%s", dev->name);
				dev_put(dev);
			}
		}
		break;
#ifdef CONFIG_KEYS
	case LSM_AUDIT_DATA_KEY:
		audit_log_format(ab, " key_serial=%u", a->u.key_struct.key);
		if (a->u.key_struct.key_desc) {
			audit_log_format(ab, " key_desc=");
			audit_log_untrustedstring(ab, a->u.key_struct.key_desc);
		}
		break;
#endif
	case LSM_AUDIT_DATA_KMOD:
		audit_log_format(ab, " kmod=");
		audit_log_untrustedstring(ab, a->u.kmod_name);
		break;
	case LSM_AUDIT_DATA_IBPKEY: {
		struct in6_addr sbn_pfx;

		memset(&sbn_pfx.s6_addr, 0,
		       sizeof(sbn_pfx.s6_addr));
		memcpy(&sbn_pfx.s6_addr, &a->u.ibpkey->subnet_prefix,
		       sizeof(a->u.ibpkey->subnet_prefix));
		audit_log_format(ab, " pkey=0x%x subnet_prefix=%pI6c",
				 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;
	case LSM_AUDIT_DATA_LOCKDOWN:
		audit_log_format(ab, " lockdown_reason=\"%s\"",
				 lockdown_reasons[a->u.reason]);
		break;
	case LSM_AUDIT_DATA_ANONINODE:
		audit_log_format(ab, " anonclass=%s", a->u.anonclass);
		break;
	} /* switch (a->type) */
}

/**
 * common_lsm_audit - generic LSM auditing function
 * @a:  auxiliary audit data
 * @pre_audit: lsm-specific pre-audit callback
 * @post_audit: lsm-specific post-audit callback
 *
 * setup the audit buffer for common security information
 * uses callback to print LSM specific information
 */
void common_lsm_audit(struct common_audit_data *a,
	void (*pre_audit)(struct audit_buffer *, void *),
	void (*post_audit)(struct audit_buffer *, void *))
{
	struct audit_buffer *ab;

	if (a == NULL)
		return;
	/* we use GFP_ATOMIC so we won't sleep */
	ab = audit_log_start(audit_context(), GFP_ATOMIC | __GFP_NOWARN,
			     AUDIT_AVC);

	if (ab == NULL)
		return;

	if (pre_audit)
		pre_audit(ab, a);

	dump_common_audit_data(ab, a);

	if (post_audit)
		post_audit(ab, a);

	audit_log_end(ab);
}
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
6e837fb1 EB	2	/*
	3	* common LSM auditing functions
	4	*
	5	* Based on code written for SELinux by :
5d728015	6	* Stephen Smalley, <sds@tycho.nsa.gov>
6e837fb1 EB	7	* James Morris <jmorris@redhat.com>
6e837fb1 EB	8	* Author : Etienne Basset, <etienne.basset@ensta.org>
6e837fb1 EB	9	*/
	10
	11	#include <linux/types.h>
	12	#include <linux/stddef.h>
	13	#include <linux/kernel.h>
5a0e3ad6	14	#include <linux/gfp.h>
6e837fb1 EB	15	#include <linux/fs.h>
	16	#include <linux/init.h>
	17	#include <net/sock.h>
	18	#include <linux/un.h>
	19	#include <net/af_unix.h>
	20	#include <linux/audit.h>
	21	#include <linux/ipv6.h>
	22	#include <linux/ip.h>
	23	#include <net/ip.h>
	24	#include <net/ipv6.h>
	25	#include <linux/tcp.h>
	26	#include <linux/udp.h>
	27	#include <linux/dccp.h>
	28	#include <linux/sctp.h>
	29	#include <linux/lsm_audit.h>
59438b46	30	#include <linux/security.h>
6e837fb1 EB	31
	32	/**
	33	* ipv4_skb_to_auditdata : fill auditdata from skb
	34	* @skb : the skb
	35	* @ad : the audit data to fill
	36	* @proto : the layer 4 protocol
	37	*
	38	* return 0 on success
	39	*/
	40	int ipv4_skb_to_auditdata(struct sk_buff *skb,
	41	struct common_audit_data ad, u8 proto)
	42	{
	43	int ret = 0;
	44	struct iphdr *ih;
	45
	46	ih = ip_hdr(skb);
48c62af6 EP	47	ad->u.net->v4info.saddr = ih->saddr;
48c62af6 EP	48	ad->u.net->v4info.daddr = ih->daddr;
6e837fb1 EB	49
	50	if (proto)
	51	*proto = ih->protocol;
	52	/* non initial fragment */
	53	if (ntohs(ih->frag_off) & IP_OFFSET)
	54	return 0;
	55
	56	switch (ih->protocol) {
	57	case IPPROTO_TCP: {
	58	struct tcphdr *th = tcp_hdr(skb);
6e837fb1	59
48c62af6 EP	60	ad->u.net->sport = th->source;
48c62af6 EP	61	ad->u.net->dport = th->dest;
6e837fb1 EB	62	break;
	63	}
	64	case IPPROTO_UDP: {
	65	struct udphdr *uh = udp_hdr(skb);
6e837fb1	66
48c62af6 EP	67	ad->u.net->sport = uh->source;
48c62af6 EP	68	ad->u.net->dport = uh->dest;
6e837fb1 EB	69	break;
	70	}
	71	case IPPROTO_DCCP: {
	72	struct dccp_hdr *dh = dccp_hdr(skb);
6e837fb1	73
48c62af6 EP	74	ad->u.net->sport = dh->dccph_sport;
48c62af6 EP	75	ad->u.net->dport = dh->dccph_dport;
6e837fb1 EB	76	break;
	77	}
	78	case IPPROTO_SCTP: {
	79	struct sctphdr *sh = sctp_hdr(skb);
4847c0eb	80
48c62af6 EP	81	ad->u.net->sport = sh->source;
48c62af6 EP	82	ad->u.net->dport = sh->dest;
6e837fb1 EB	83	break;
	84	}
	85	default:
	86	ret = -EINVAL;
	87	}
	88	return ret;
	89	}
1a93a6ea	90	#if IS_ENABLED(CONFIG_IPV6)
6e837fb1 EB	91	/**
	92	* ipv6_skb_to_auditdata : fill auditdata from skb
	93	* @skb : the skb
	94	* @ad : the audit data to fill
	95	* @proto : the layer 4 protocol
	96	*
	97	* return 0 on success
	98	*/
	99	int ipv6_skb_to_auditdata(struct sk_buff *skb,
	100	struct common_audit_data ad, u8 proto)
	101	{
	102	int offset, ret = 0;
	103	struct ipv6hdr *ip6;
	104	u8 nexthdr;
75f2811c	105	__be16 frag_off;
6e837fb1 EB	106
6e837fb1 EB	107	ip6 = ipv6_hdr(skb);
48c62af6 EP	108	ad->u.net->v6info.saddr = ip6->saddr;
48c62af6 EP	109	ad->u.net->v6info.daddr = ip6->daddr;
6e837fb1 EB	110	/* IPv6 can have several extension header before the Transport header
	111	* skip them */
	112	offset = skb_network_offset(skb);
	113	offset += sizeof(*ip6);
	114	nexthdr = ip6->nexthdr;
75f2811c	115	offset = ipv6_skip_exthdr(skb, offset, &nexthdr, &frag_off);
6e837fb1 EB	116	if (offset < 0)
	117	return 0;
	118	if (proto)
	119	*proto = nexthdr;
	120	switch (nexthdr) {
	121	case IPPROTO_TCP: {
	122	struct tcphdr _tcph, *th;
	123
	124	th = skb_header_pointer(skb, offset, sizeof(_tcph), &_tcph);
	125	if (th == NULL)
	126	break;
	127
48c62af6 EP	128	ad->u.net->sport = th->source;
48c62af6 EP	129	ad->u.net->dport = th->dest;
6e837fb1 EB	130	break;
	131	}
	132	case IPPROTO_UDP: {
	133	struct udphdr _udph, *uh;
	134
	135	uh = skb_header_pointer(skb, offset, sizeof(_udph), &_udph);
	136	if (uh == NULL)
	137	break;
	138
48c62af6 EP	139	ad->u.net->sport = uh->source;
48c62af6 EP	140	ad->u.net->dport = uh->dest;
6e837fb1 EB	141	break;
	142	}
	143	case IPPROTO_DCCP: {
	144	struct dccp_hdr _dccph, *dh;
	145
	146	dh = skb_header_pointer(skb, offset, sizeof(_dccph), &_dccph);
	147	if (dh == NULL)
	148	break;
	149
48c62af6 EP	150	ad->u.net->sport = dh->dccph_sport;
48c62af6 EP	151	ad->u.net->dport = dh->dccph_dport;
6e837fb1 EB	152	break;
	153	}
	154	case IPPROTO_SCTP: {
	155	struct sctphdr _sctph, *sh;
	156
	157	sh = skb_header_pointer(skb, offset, sizeof(_sctph), &_sctph);
	158	if (sh == NULL)
	159	break;
48c62af6 EP	160	ad->u.net->sport = sh->source;
48c62af6 EP	161	ad->u.net->dport = sh->dest;
6e837fb1 EB	162	break;
	163	}
	164	default:
	165	ret = -EINVAL;
	166	}
	167	return ret;
	168	}
	169	#endif
	170
	171
	172	static inline void print_ipv6_addr(struct audit_buffer *ab,
41dd9596	173	const struct in6_addr *addr, __be16 port,
6e837fb1 EB	174	char name1, char name2)
	175	{
	176	if (!ipv6_addr_any(addr))
d8116591	177	audit_log_format(ab, " %s=%pI6c", name1, addr);
6e837fb1 EB	178	if (port)
	179	audit_log_format(ab, " %s=%d", name2, ntohs(port));
	180	}
	181
	182	static inline void print_ipv4_addr(struct audit_buffer *ab, __be32 addr,
	183	__be16 port, char name1, char name2)
	184	{
	185	if (addr)
	186	audit_log_format(ab, " %s=%pI4", name1, &addr);
	187	if (port)
	188	audit_log_format(ab, " %s=%d", name2, ntohs(port));
	189	}
	190
	191	/**
	192	* dump_common_audit_data - helper to dump common audit data
	193	* @a : common audit data
	194	*
	195	*/
	196	static void dump_common_audit_data(struct audit_buffer *ab,
	197	struct common_audit_data *a)
	198	{
5deeb5ce	199	char comm[sizeof(current->comm)];
6e837fb1	200
07f62eb6 EP	201	/*
	202	* To keep stack sizes in check force programers to notice if they
	203	* start making this union too large! See struct lsm_network_audit
	204	* as an example of how to deal with large data.
	205	*/
	206	BUILD_BUG_ON(sizeof(a->u) > sizeof(void )2);
	207
fa2bea2f	208	audit_log_format(ab, " pid=%d comm=", task_tgid_nr(current));
5deeb5ce	209	audit_log_untrustedstring(ab, memcpy(comm, current->comm, sizeof(comm)));
6e837fb1 EB	210
6e837fb1 EB	211	switch (a->type) {
cb84aa9b	212	case LSM_AUDIT_DATA_NONE:
2bf49690	213	return;
6e837fb1	214	case LSM_AUDIT_DATA_IPC:
8e71168e	215	audit_log_format(ab, " ipc_key=%d ", a->u.ipc_id);
6e837fb1 EB	216	break;
	217	case LSM_AUDIT_DATA_CAP:
	218	audit_log_format(ab, " capability=%d ", a->u.cap);
	219	break;
f48b7399	220	case LSM_AUDIT_DATA_PATH: {
f48b7399 EP	221	struct inode *inode;
f48b7399 EP	222
c158a35c	223	audit_log_d_path(ab, " path=", &a->u.path);
a269434d	224
c6f493d6	225	inode = d_backing_inode(a->u.path.dentry);
41fdc305 KC	226	if (inode) {
	227	audit_log_format(ab, " dev=");
	228	audit_log_untrustedstring(ab, inode->i_sb->s_id);
	229	audit_log_format(ab, " ino=%lu", inode->i_ino);
	230	}
a269434d EP	231	break;
a269434d EP	232	}
43af5de7 VG	233	case LSM_AUDIT_DATA_FILE: {
	234	struct inode *inode;
	235
	236	audit_log_d_path(ab, " path=", &a->u.file->f_path);
	237
	238	inode = file_inode(a->u.file);
	239	if (inode) {
	240	audit_log_format(ab, " dev=");
	241	audit_log_untrustedstring(ab, inode->i_sb->s_id);
	242	audit_log_format(ab, " ino=%lu", inode->i_ino);
	243	}
	244	break;
	245	}
671a2781 JVS	246	case LSM_AUDIT_DATA_IOCTL_OP: {
	247	struct inode *inode;
	248
	249	audit_log_d_path(ab, " path=", &a->u.op->path);
	250
	251	inode = a->u.op->path.dentry->d_inode;
	252	if (inode) {
	253	audit_log_format(ab, " dev=");
	254	audit_log_untrustedstring(ab, inode->i_sb->s_id);
	255	audit_log_format(ab, " ino=%lu", inode->i_ino);
	256	}
	257
8b31f456	258	audit_log_format(ab, " ioctlcmd=0x%hx", a->u.op->cmd);
671a2781 JVS	259	break;
671a2781 JVS	260	}
a269434d EP	261	case LSM_AUDIT_DATA_DENTRY: {
	262	struct inode *inode;
	263
	264	audit_log_format(ab, " name=");
d36a1dd9	265	spin_lock(&a->u.dentry->d_lock);
a269434d	266	audit_log_untrustedstring(ab, a->u.dentry->d_name.name);
d36a1dd9	267	spin_unlock(&a->u.dentry->d_lock);
a269434d	268
c6f493d6	269	inode = d_backing_inode(a->u.dentry);
41fdc305 KC	270	if (inode) {
	271	audit_log_format(ab, " dev=");
	272	audit_log_untrustedstring(ab, inode->i_sb->s_id);
	273	audit_log_format(ab, " ino=%lu", inode->i_ino);
	274	}
6e837fb1	275	break;
f48b7399 EP	276	}
	277	case LSM_AUDIT_DATA_INODE: {
	278	struct dentry *dentry;
	279	struct inode *inode;
	280
23d8f5b6	281	rcu_read_lock();
f48b7399	282	inode = a->u.inode;
23d8f5b6	283	dentry = d_find_alias_rcu(inode);
f48b7399 EP	284	if (dentry) {
f48b7399 EP	285	audit_log_format(ab, " name=");
d36a1dd9 AV	286	spin_lock(&dentry->d_lock);
	287	audit_log_untrustedstring(ab, dentry->d_name.name);
	288	spin_unlock(&dentry->d_lock);
f48b7399	289	}
41fdc305 KC	290	audit_log_format(ab, " dev=");
	291	audit_log_untrustedstring(ab, inode->i_sb->s_id);
	292	audit_log_format(ab, " ino=%lu", inode->i_ino);
23d8f5b6	293	rcu_read_unlock();
f48b7399 EP	294	break;
f48b7399 EP	295	}
5deeb5ce RGB	296	case LSM_AUDIT_DATA_TASK: {
5deeb5ce RGB	297	struct task_struct *tsk = a->u.tsk;
f1dc4867	298	if (tsk) {
fa2bea2f	299	pid_t pid = task_tgid_nr(tsk);
f1dc4867	300	if (pid) {
5deeb5ce	301	char comm[sizeof(tsk->comm)];
5c5bc97e	302	audit_log_format(ab, " opid=%d ocomm=", pid);
5deeb5ce RGB	303	audit_log_untrustedstring(ab,
5deeb5ce RGB	304	memcpy(comm, tsk->comm, sizeof(comm)));
f1dc4867	305	}
6e837fb1 EB	306	}
6e837fb1 EB	307	break;
5deeb5ce	308	}
6e837fb1	309	case LSM_AUDIT_DATA_NET:
48c62af6	310	if (a->u.net->sk) {
41dd9596	311	const struct sock *sk = a->u.net->sk;
6e837fb1	312	struct unix_sock *u;
ae3b5641	313	struct unix_address *addr;
6e837fb1 EB	314	int len = 0;
	315	char *p = NULL;
	316
	317	switch (sk->sk_family) {
	318	case AF_INET: {
	319	struct inet_sock *inet = inet_sk(sk);
	320
c720c7e8 ED	321	print_ipv4_addr(ab, inet->inet_rcv_saddr,
c720c7e8 ED	322	inet->inet_sport,
6e837fb1	323	"laddr", "lport");
c720c7e8 ED	324	print_ipv4_addr(ab, inet->inet_daddr,
c720c7e8 ED	325	inet->inet_dport,
6e837fb1 EB	326	"faddr", "fport");
	327	break;
	328	}
c2bb06db	329	#if IS_ENABLED(CONFIG_IPV6)
6e837fb1 EB	330	case AF_INET6: {
6e837fb1 EB	331	struct inet_sock *inet = inet_sk(sk);
6e837fb1	332
efe4208f	333	print_ipv6_addr(ab, &sk->sk_v6_rcv_saddr,
c720c7e8	334	inet->inet_sport,
6e837fb1	335	"laddr", "lport");
efe4208f	336	print_ipv6_addr(ab, &sk->sk_v6_daddr,
c720c7e8	337	inet->inet_dport,
6e837fb1 EB	338	"faddr", "fport");
	339	break;
	340	}
c2bb06db	341	#endif
6e837fb1 EB	342	case AF_UNIX:
6e837fb1 EB	343	u = unix_sk(sk);
ae3b5641 AV	344	addr = smp_load_acquire(&u->addr);
	345	if (!addr)
	346	break;
40ffe67d AV	347	if (u->path.dentry) {
40ffe67d AV	348	audit_log_d_path(ab, " path=", &u->path);
6e837fb1 EB	349	break;
6e837fb1 EB	350	}
ae3b5641 AV	351	len = addr->len-sizeof(short);
ae3b5641 AV	352	p = &addr->name->sun_path[0];
6e837fb1 EB	353	audit_log_format(ab, " path=");
	354	if (*p)
	355	audit_log_untrustedstring(ab, p);
	356	else
	357	audit_log_n_hex(ab, p, len);
	358	break;
	359	}
	360	}
	361
48c62af6	362	switch (a->u.net->family) {
6e837fb1	363	case AF_INET:
48c62af6 EP	364	print_ipv4_addr(ab, a->u.net->v4info.saddr,
48c62af6 EP	365	a->u.net->sport,
6e837fb1	366	"saddr", "src");
48c62af6 EP	367	print_ipv4_addr(ab, a->u.net->v4info.daddr,
48c62af6 EP	368	a->u.net->dport,
6e837fb1 EB	369	"daddr", "dest");
	370	break;
	371	case AF_INET6:
48c62af6 EP	372	print_ipv6_addr(ab, &a->u.net->v6info.saddr,
48c62af6 EP	373	a->u.net->sport,
6e837fb1	374	"saddr", "src");
48c62af6 EP	375	print_ipv6_addr(ab, &a->u.net->v6info.daddr,
48c62af6 EP	376	a->u.net->dport,
6e837fb1 EB	377	"daddr", "dest");
	378	break;
	379	}
48c62af6	380	if (a->u.net->netif > 0) {
6e837fb1 EB	381	struct net_device *dev;
	382
	383	/* NOTE: we always use init's namespace */
48c62af6	384	dev = dev_get_by_index(&init_net, a->u.net->netif);
6e837fb1 EB	385	if (dev) {
	386	audit_log_format(ab, " netif=%s", dev->name);
	387	dev_put(dev);
	388	}
	389	}
	390	break;
	391	#ifdef CONFIG_KEYS
	392	case LSM_AUDIT_DATA_KEY:
	393	audit_log_format(ab, " key_serial=%u", a->u.key_struct.key);
	394	if (a->u.key_struct.key_desc) {
	395	audit_log_format(ab, " key_desc=");
	396	audit_log_untrustedstring(ab, a->u.key_struct.key_desc);
	397	}
	398	break;
	399	#endif
dd8dbf2e EP	400	case LSM_AUDIT_DATA_KMOD:
	401	audit_log_format(ab, " kmod=");
	402	audit_log_untrustedstring(ab, a->u.kmod_name);
	403	break;
cfc4d882 DJ	404	case LSM_AUDIT_DATA_IBPKEY: {
	405	struct in6_addr sbn_pfx;
	406
	407	memset(&sbn_pfx.s6_addr, 0,
	408	sizeof(sbn_pfx.s6_addr));
	409	memcpy(&sbn_pfx.s6_addr, &a->u.ibpkey->subnet_prefix,
	410	sizeof(a->u.ibpkey->subnet_prefix));
	411	audit_log_format(ab, " pkey=0x%x subnet_prefix=%pI6c",
	412	a->u.ibpkey->pkey, &sbn_pfx);
	413	break;
	414	}
ab861dfc DJ	415	case LSM_AUDIT_DATA_IBENDPORT:
	416	audit_log_format(ab, " device=%s port_num=%u",
	417	a->u.ibendport->dev_name,
	418	a->u.ibendport->port);
	419	break;
59438b46	420	case LSM_AUDIT_DATA_LOCKDOWN:
f1d9b23c RGB	421	audit_log_format(ab, " lockdown_reason=\"%s\"",
f1d9b23c RGB	422	lockdown_reasons[a->u.reason]);
59438b46	423	break;
c29722fa CG	424	case LSM_AUDIT_DATA_ANONINODE:
	425	audit_log_format(ab, " anonclass=%s", a->u.anonclass);
	426	break;
6e837fb1 EB	427	} /* switch (a->type) */
	428	}
	429
	430	/**
	431	* common_lsm_audit - generic LSM auditing function
	432	* @a: auxiliary audit data
b61c37f5 LT	433	* @pre_audit: lsm-specific pre-audit callback
b61c37f5 LT	434	* @post_audit: lsm-specific post-audit callback
6e837fb1 EB	435	*
	436	* setup the audit buffer for common security information
	437	* uses callback to print LSM specific information
	438	*/
b61c37f5 LT	439	void common_lsm_audit(struct common_audit_data *a,
	440	void (pre_audit)(struct audit_buffer , void *),
	441	void (post_audit)(struct audit_buffer , void *))
6e837fb1 EB	442	{
	443	struct audit_buffer *ab;
	444
	445	if (a == NULL)
	446	return;
	447	/* we use GFP_ATOMIC so we won't sleep */
cdfb6b34	448	ab = audit_log_start(audit_context(), GFP_ATOMIC \| __GFP_NOWARN,
a20b62bd	449	AUDIT_AVC);
6e837fb1 EB	450
	451	if (ab == NULL)
	452	return;
	453
b61c37f5 LT	454	if (pre_audit)
b61c37f5 LT	455	pre_audit(ab, a);
6e837fb1 EB	456
	457	dump_common_audit_data(ab, a);
	458
b61c37f5 LT	459	if (post_audit)
b61c37f5 LT	460	post_audit(ab, a);
6e837fb1 EB	461
	462	audit_log_end(ab);
	463	}