[mirror_ubuntu-hirsute-kernel.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);
	if (ih == NULL)
		return -EINVAL;

	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);
		if (th == NULL)
			break;

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

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

		ad->u.net->sport = dh->dccph_sport;
		ad->u.net->dport = dh->dccph_dport;
		break;
	}
	case IPPROTO_SCTP: {
		struct sctphdr *sh = sctp_hdr(skb);
		if (sh == NULL)
			break;
		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);
	if (ip6 == NULL)
		return -EINVAL;
	ad->u.net->v6info.saddr = ip6->saddr;
	ad->u.net->v6info.daddr = ip6->daddr;
	ret = 0;
	/* 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,
				   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, " 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=");
		audit_log_untrustedstring(ab, a->u.dentry->d_name.name);

		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;

		inode = a->u.inode;
		dentry = d_find_alias(inode);
		if (dentry) {
			audit_log_format(ab, " name=");
			audit_log_untrustedstring(ab,
					 dentry->d_name.name);
			dput(dentry);
		}
		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_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) {
			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=");
		audit_log_string(ab, lockdown_reasons[a->u.reason]);
		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);
	47	if (ih == NULL)
	48	return -EINVAL;
	49
48c62af6 EP	50	ad->u.net->v4info.saddr = ih->saddr;
48c62af6 EP	51	ad->u.net->v4info.daddr = ih->daddr;
6e837fb1 EB	52
	53	if (proto)
	54	*proto = ih->protocol;
	55	/* non initial fragment */
	56	if (ntohs(ih->frag_off) & IP_OFFSET)
	57	return 0;
	58
	59	switch (ih->protocol) {
	60	case IPPROTO_TCP: {
	61	struct tcphdr *th = tcp_hdr(skb);
	62	if (th == NULL)
	63	break;
	64
48c62af6 EP	65	ad->u.net->sport = th->source;
48c62af6 EP	66	ad->u.net->dport = th->dest;
6e837fb1 EB	67	break;
	68	}
	69	case IPPROTO_UDP: {
	70	struct udphdr *uh = udp_hdr(skb);
	71	if (uh == NULL)
	72	break;
	73
48c62af6 EP	74	ad->u.net->sport = uh->source;
48c62af6 EP	75	ad->u.net->dport = uh->dest;
6e837fb1 EB	76	break;
	77	}
	78	case IPPROTO_DCCP: {
	79	struct dccp_hdr *dh = dccp_hdr(skb);
	80	if (dh == NULL)
	81	break;
	82
48c62af6 EP	83	ad->u.net->sport = dh->dccph_sport;
48c62af6 EP	84	ad->u.net->dport = dh->dccph_dport;
6e837fb1 EB	85	break;
	86	}
	87	case IPPROTO_SCTP: {
	88	struct sctphdr *sh = sctp_hdr(skb);
	89	if (sh == NULL)
	90	break;
48c62af6 EP	91	ad->u.net->sport = sh->source;
48c62af6 EP	92	ad->u.net->dport = sh->dest;
6e837fb1 EB	93	break;
	94	}
	95	default:
	96	ret = -EINVAL;
	97	}
	98	return ret;
	99	}
1a93a6ea	100	#if IS_ENABLED(CONFIG_IPV6)
6e837fb1 EB	101	/**
	102	* ipv6_skb_to_auditdata : fill auditdata from skb
	103	* @skb : the skb
	104	* @ad : the audit data to fill
	105	* @proto : the layer 4 protocol
	106	*
	107	* return 0 on success
	108	*/
	109	int ipv6_skb_to_auditdata(struct sk_buff *skb,
	110	struct common_audit_data ad, u8 proto)
	111	{
	112	int offset, ret = 0;
	113	struct ipv6hdr *ip6;
	114	u8 nexthdr;
75f2811c	115	__be16 frag_off;
6e837fb1 EB	116
	117	ip6 = ipv6_hdr(skb);
	118	if (ip6 == NULL)
	119	return -EINVAL;
48c62af6 EP	120	ad->u.net->v6info.saddr = ip6->saddr;
48c62af6 EP	121	ad->u.net->v6info.daddr = ip6->daddr;
6e837fb1 EB	122	ret = 0;
	123	/* IPv6 can have several extension header before the Transport header
	124	* skip them */
	125	offset = skb_network_offset(skb);
	126	offset += sizeof(*ip6);
	127	nexthdr = ip6->nexthdr;
75f2811c	128	offset = ipv6_skip_exthdr(skb, offset, &nexthdr, &frag_off);
6e837fb1 EB	129	if (offset < 0)
	130	return 0;
	131	if (proto)
	132	*proto = nexthdr;
	133	switch (nexthdr) {
	134	case IPPROTO_TCP: {
	135	struct tcphdr _tcph, *th;
	136
	137	th = skb_header_pointer(skb, offset, sizeof(_tcph), &_tcph);
	138	if (th == NULL)
	139	break;
	140
48c62af6 EP	141	ad->u.net->sport = th->source;
48c62af6 EP	142	ad->u.net->dport = th->dest;
6e837fb1 EB	143	break;
	144	}
	145	case IPPROTO_UDP: {
	146	struct udphdr _udph, *uh;
	147
	148	uh = skb_header_pointer(skb, offset, sizeof(_udph), &_udph);
	149	if (uh == NULL)
	150	break;
	151
48c62af6 EP	152	ad->u.net->sport = uh->source;
48c62af6 EP	153	ad->u.net->dport = uh->dest;
6e837fb1 EB	154	break;
	155	}
	156	case IPPROTO_DCCP: {
	157	struct dccp_hdr _dccph, *dh;
	158
	159	dh = skb_header_pointer(skb, offset, sizeof(_dccph), &_dccph);
	160	if (dh == NULL)
	161	break;
	162
48c62af6 EP	163	ad->u.net->sport = dh->dccph_sport;
48c62af6 EP	164	ad->u.net->dport = dh->dccph_dport;
6e837fb1 EB	165	break;
	166	}
	167	case IPPROTO_SCTP: {
	168	struct sctphdr _sctph, *sh;
	169
	170	sh = skb_header_pointer(skb, offset, sizeof(_sctph), &_sctph);
	171	if (sh == NULL)
	172	break;
48c62af6 EP	173	ad->u.net->sport = sh->source;
48c62af6 EP	174	ad->u.net->dport = sh->dest;
6e837fb1 EB	175	break;
	176	}
	177	default:
	178	ret = -EINVAL;
	179	}
	180	return ret;
	181	}
	182	#endif
	183
	184
	185	static inline void print_ipv6_addr(struct audit_buffer *ab,
	186	struct in6_addr *addr, __be16 port,
	187	char name1, char name2)
	188	{
	189	if (!ipv6_addr_any(addr))
d8116591	190	audit_log_format(ab, " %s=%pI6c", name1, addr);
6e837fb1 EB	191	if (port)
	192	audit_log_format(ab, " %s=%d", name2, ntohs(port));
	193	}
	194
	195	static inline void print_ipv4_addr(struct audit_buffer *ab, __be32 addr,
	196	__be16 port, char name1, char name2)
	197	{
	198	if (addr)
	199	audit_log_format(ab, " %s=%pI4", name1, &addr);
	200	if (port)
	201	audit_log_format(ab, " %s=%d", name2, ntohs(port));
	202	}
	203
	204	/**
	205	* dump_common_audit_data - helper to dump common audit data
	206	* @a : common audit data
	207	*
	208	*/
	209	static void dump_common_audit_data(struct audit_buffer *ab,
	210	struct common_audit_data *a)
	211	{
5deeb5ce	212	char comm[sizeof(current->comm)];
6e837fb1	213
07f62eb6 EP	214	/*
	215	* To keep stack sizes in check force programers to notice if they
	216	* start making this union too large! See struct lsm_network_audit
	217	* as an example of how to deal with large data.
	218	*/
	219	BUILD_BUG_ON(sizeof(a->u) > sizeof(void )2);
	220
fa2bea2f	221	audit_log_format(ab, " pid=%d comm=", task_tgid_nr(current));
5deeb5ce	222	audit_log_untrustedstring(ab, memcpy(comm, current->comm, sizeof(comm)));
6e837fb1 EB	223
6e837fb1 EB	224	switch (a->type) {
cb84aa9b	225	case LSM_AUDIT_DATA_NONE:
2bf49690	226	return;
6e837fb1 EB	227	case LSM_AUDIT_DATA_IPC:
	228	audit_log_format(ab, " key=%d ", a->u.ipc_id);
	229	break;
	230	case LSM_AUDIT_DATA_CAP:
	231	audit_log_format(ab, " capability=%d ", a->u.cap);
	232	break;
f48b7399	233	case LSM_AUDIT_DATA_PATH: {
f48b7399 EP	234	struct inode *inode;
f48b7399 EP	235
c158a35c	236	audit_log_d_path(ab, " path=", &a->u.path);
a269434d	237
c6f493d6	238	inode = d_backing_inode(a->u.path.dentry);
41fdc305 KC	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	}
a269434d EP	244	break;
a269434d EP	245	}
43af5de7 VG	246	case LSM_AUDIT_DATA_FILE: {
	247	struct inode *inode;
	248
	249	audit_log_d_path(ab, " path=", &a->u.file->f_path);
	250
	251	inode = file_inode(a->u.file);
	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	break;
	258	}
671a2781 JVS	259	case LSM_AUDIT_DATA_IOCTL_OP: {
	260	struct inode *inode;
	261
	262	audit_log_d_path(ab, " path=", &a->u.op->path);
	263
	264	inode = a->u.op->path.dentry->d_inode;
	265	if (inode) {
	266	audit_log_format(ab, " dev=");
	267	audit_log_untrustedstring(ab, inode->i_sb->s_id);
	268	audit_log_format(ab, " ino=%lu", inode->i_ino);
	269	}
	270
8b31f456	271	audit_log_format(ab, " ioctlcmd=0x%hx", a->u.op->cmd);
671a2781 JVS	272	break;
671a2781 JVS	273	}
a269434d EP	274	case LSM_AUDIT_DATA_DENTRY: {
	275	struct inode *inode;
	276
	277	audit_log_format(ab, " name=");
	278	audit_log_untrustedstring(ab, a->u.dentry->d_name.name);
	279
c6f493d6	280	inode = d_backing_inode(a->u.dentry);
41fdc305 KC	281	if (inode) {
	282	audit_log_format(ab, " dev=");
	283	audit_log_untrustedstring(ab, inode->i_sb->s_id);
	284	audit_log_format(ab, " ino=%lu", inode->i_ino);
	285	}
6e837fb1	286	break;
f48b7399 EP	287	}
	288	case LSM_AUDIT_DATA_INODE: {
	289	struct dentry *dentry;
	290	struct inode *inode;
	291
	292	inode = a->u.inode;
	293	dentry = d_find_alias(inode);
	294	if (dentry) {
	295	audit_log_format(ab, " name=");
	296	audit_log_untrustedstring(ab,
	297	dentry->d_name.name);
	298	dput(dentry);
	299	}
41fdc305 KC	300	audit_log_format(ab, " dev=");
	301	audit_log_untrustedstring(ab, inode->i_sb->s_id);
	302	audit_log_format(ab, " ino=%lu", inode->i_ino);
f48b7399 EP	303	break;
f48b7399 EP	304	}
5deeb5ce RGB	305	case LSM_AUDIT_DATA_TASK: {
5deeb5ce RGB	306	struct task_struct *tsk = a->u.tsk;
f1dc4867	307	if (tsk) {
fa2bea2f	308	pid_t pid = task_tgid_nr(tsk);
f1dc4867	309	if (pid) {
5deeb5ce	310	char comm[sizeof(tsk->comm)];
5c5bc97e	311	audit_log_format(ab, " opid=%d ocomm=", pid);
5deeb5ce RGB	312	audit_log_untrustedstring(ab,
5deeb5ce RGB	313	memcpy(comm, tsk->comm, sizeof(comm)));
f1dc4867	314	}
6e837fb1 EB	315	}
6e837fb1 EB	316	break;
5deeb5ce	317	}
6e837fb1	318	case LSM_AUDIT_DATA_NET:
48c62af6 EP	319	if (a->u.net->sk) {
48c62af6 EP	320	struct sock *sk = a->u.net->sk;
6e837fb1	321	struct unix_sock *u;
ae3b5641	322	struct unix_address *addr;
6e837fb1 EB	323	int len = 0;
	324	char *p = NULL;
	325
	326	switch (sk->sk_family) {
	327	case AF_INET: {
	328	struct inet_sock *inet = inet_sk(sk);
	329
c720c7e8 ED	330	print_ipv4_addr(ab, inet->inet_rcv_saddr,
c720c7e8 ED	331	inet->inet_sport,
6e837fb1	332	"laddr", "lport");
c720c7e8 ED	333	print_ipv4_addr(ab, inet->inet_daddr,
c720c7e8 ED	334	inet->inet_dport,
6e837fb1 EB	335	"faddr", "fport");
	336	break;
	337	}
c2bb06db	338	#if IS_ENABLED(CONFIG_IPV6)
6e837fb1 EB	339	case AF_INET6: {
6e837fb1 EB	340	struct inet_sock *inet = inet_sk(sk);
6e837fb1	341
efe4208f	342	print_ipv6_addr(ab, &sk->sk_v6_rcv_saddr,
c720c7e8	343	inet->inet_sport,
6e837fb1	344	"laddr", "lport");
efe4208f	345	print_ipv6_addr(ab, &sk->sk_v6_daddr,
c720c7e8	346	inet->inet_dport,
6e837fb1 EB	347	"faddr", "fport");
	348	break;
	349	}
c2bb06db	350	#endif
6e837fb1 EB	351	case AF_UNIX:
6e837fb1 EB	352	u = unix_sk(sk);
ae3b5641 AV	353	addr = smp_load_acquire(&u->addr);
	354	if (!addr)
	355	break;
40ffe67d AV	356	if (u->path.dentry) {
40ffe67d AV	357	audit_log_d_path(ab, " path=", &u->path);
6e837fb1 EB	358	break;
6e837fb1 EB	359	}
ae3b5641 AV	360	len = addr->len-sizeof(short);
ae3b5641 AV	361	p = &addr->name->sun_path[0];
6e837fb1 EB	362	audit_log_format(ab, " path=");
	363	if (*p)
	364	audit_log_untrustedstring(ab, p);
	365	else
	366	audit_log_n_hex(ab, p, len);
	367	break;
	368	}
	369	}
	370
48c62af6	371	switch (a->u.net->family) {
6e837fb1	372	case AF_INET:
48c62af6 EP	373	print_ipv4_addr(ab, a->u.net->v4info.saddr,
48c62af6 EP	374	a->u.net->sport,
6e837fb1	375	"saddr", "src");
48c62af6 EP	376	print_ipv4_addr(ab, a->u.net->v4info.daddr,
48c62af6 EP	377	a->u.net->dport,
6e837fb1 EB	378	"daddr", "dest");
	379	break;
	380	case AF_INET6:
48c62af6 EP	381	print_ipv6_addr(ab, &a->u.net->v6info.saddr,
48c62af6 EP	382	a->u.net->sport,
6e837fb1	383	"saddr", "src");
48c62af6 EP	384	print_ipv6_addr(ab, &a->u.net->v6info.daddr,
48c62af6 EP	385	a->u.net->dport,
6e837fb1 EB	386	"daddr", "dest");
	387	break;
	388	}
48c62af6	389	if (a->u.net->netif > 0) {
6e837fb1 EB	390	struct net_device *dev;
	391
	392	/* NOTE: we always use init's namespace */
48c62af6	393	dev = dev_get_by_index(&init_net, a->u.net->netif);
6e837fb1 EB	394	if (dev) {
	395	audit_log_format(ab, " netif=%s", dev->name);
	396	dev_put(dev);
	397	}
	398	}
	399	break;
	400	#ifdef CONFIG_KEYS
	401	case LSM_AUDIT_DATA_KEY:
	402	audit_log_format(ab, " key_serial=%u", a->u.key_struct.key);
	403	if (a->u.key_struct.key_desc) {
	404	audit_log_format(ab, " key_desc=");
	405	audit_log_untrustedstring(ab, a->u.key_struct.key_desc);
	406	}
	407	break;
	408	#endif
dd8dbf2e EP	409	case LSM_AUDIT_DATA_KMOD:
	410	audit_log_format(ab, " kmod=");
	411	audit_log_untrustedstring(ab, a->u.kmod_name);
	412	break;
cfc4d882 DJ	413	case LSM_AUDIT_DATA_IBPKEY: {
	414	struct in6_addr sbn_pfx;
	415
	416	memset(&sbn_pfx.s6_addr, 0,
	417	sizeof(sbn_pfx.s6_addr));
	418	memcpy(&sbn_pfx.s6_addr, &a->u.ibpkey->subnet_prefix,
	419	sizeof(a->u.ibpkey->subnet_prefix));
	420	audit_log_format(ab, " pkey=0x%x subnet_prefix=%pI6c",
	421	a->u.ibpkey->pkey, &sbn_pfx);
	422	break;
	423	}
ab861dfc DJ	424	case LSM_AUDIT_DATA_IBENDPORT:
	425	audit_log_format(ab, " device=%s port_num=%u",
	426	a->u.ibendport->dev_name,
	427	a->u.ibendport->port);
	428	break;
59438b46 SS	429	case LSM_AUDIT_DATA_LOCKDOWN:
	430	audit_log_format(ab, " lockdown_reason=");
	431	audit_log_string(ab, lockdown_reasons[a->u.reason]);
	432	break;
6e837fb1 EB	433	} /* switch (a->type) */
	434	}
	435
	436	/**
	437	* common_lsm_audit - generic LSM auditing function
	438	* @a: auxiliary audit data
b61c37f5 LT	439	* @pre_audit: lsm-specific pre-audit callback
b61c37f5 LT	440	* @post_audit: lsm-specific post-audit callback
6e837fb1 EB	441	*
	442	* setup the audit buffer for common security information
	443	* uses callback to print LSM specific information
	444	*/
b61c37f5 LT	445	void common_lsm_audit(struct common_audit_data *a,
	446	void (pre_audit)(struct audit_buffer , void *),
	447	void (post_audit)(struct audit_buffer , void *))
6e837fb1 EB	448	{
	449	struct audit_buffer *ab;
	450
	451	if (a == NULL)
	452	return;
	453	/* we use GFP_ATOMIC so we won't sleep */
cdfb6b34	454	ab = audit_log_start(audit_context(), GFP_ATOMIC \| __GFP_NOWARN,
a20b62bd	455	AUDIT_AVC);
6e837fb1 EB	456
	457	if (ab == NULL)
	458	return;
	459
b61c37f5 LT	460	if (pre_audit)
b61c37f5 LT	461	pre_audit(ab, a);
6e837fb1 EB	462
	463	dump_common_audit_data(ab, a);
	464
b61c37f5 LT	465	if (post_audit)
b61c37f5 LT	466	post_audit(ab, a);
6e837fb1 EB	467
	468	audit_log_end(ab);
	469	}