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-rw-r--r--Documentation/kernel-parameters.txt16
-rw-r--r--MAINTAINERS3
-rw-r--r--drivers/tty/tty_audit.c2
-rw-r--r--include/asm-generic/audit_change_attr.h4
-rw-r--r--include/asm-generic/audit_write.h6
-rw-r--r--include/linux/audit.h22
-rw-r--r--include/linux/init_task.h2
-rw-r--r--include/net/netlabel.h2
-rw-r--r--include/net/xfrm.h20
-rw-r--r--include/uapi/linux/audit.h8
-rw-r--r--kernel/audit.c365
-rw-r--r--kernel/audit.h15
-rw-r--r--kernel/auditfilter.c93
-rw-r--r--kernel/auditsc.c44
-rw-r--r--kernel/capability.c2
-rw-r--r--net/xfrm/xfrm_policy.c8
-rw-r--r--net/xfrm/xfrm_state.c6
-rw-r--r--net/xfrm/xfrm_user.c12
-rw-r--r--security/selinux/ss/services.c12
-rw-r--r--security/smack/smack_lsm.c5
20 files changed, 404 insertions, 243 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index f085a61a1ed..d4762d7ebd1 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -463,6 +463,22 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
atkbd.softrepeat= [HW]
Use software keyboard repeat
+ audit= [KNL] Enable the audit sub-system
+ Format: { "0" | "1" } (0 = disabled, 1 = enabled)
+ 0 - kernel audit is disabled and can not be enabled
+ until the next reboot
+ unset - kernel audit is initialized but disabled and
+ will be fully enabled by the userspace auditd.
+ 1 - kernel audit is initialized and partially enabled,
+ storing at most audit_backlog_limit messages in
+ RAM until it is fully enabled by the userspace
+ auditd.
+ Default: unset
+
+ audit_backlog_limit= [KNL] Set the audit queue size limit.
+ Format: <int> (must be >=0)
+ Default: 64
+
baycom_epp= [HW,AX25]
Format: <io>,<mode>
diff --git a/MAINTAINERS b/MAINTAINERS
index 671047620db..3229945a96b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1597,11 +1597,10 @@ S: Supported
F: drivers/scsi/esas2r
AUDIT SUBSYSTEM
-M: Al Viro <viro@zeniv.linux.org.uk>
M: Eric Paris <eparis@redhat.com>
L: linux-audit@redhat.com (subscribers-only)
W: http://people.redhat.com/sgrubb/audit/
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current.git
+T: git git://git.infradead.org/users/eparis/audit.git
S: Maintained
F: include/linux/audit.h
F: include/uapi/linux/audit.h
diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
index a4fdce74f88..b0e540137e3 100644
--- a/drivers/tty/tty_audit.c
+++ b/drivers/tty/tty_audit.c
@@ -67,7 +67,7 @@ static void tty_audit_log(const char *description, int major, int minor,
struct task_struct *tsk = current;
uid_t uid = from_kuid(&init_user_ns, task_uid(tsk));
uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(tsk));
- u32 sessionid = audit_get_sessionid(tsk);
+ unsigned int sessionid = audit_get_sessionid(tsk);
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
if (ab) {
diff --git a/include/asm-generic/audit_change_attr.h b/include/asm-generic/audit_change_attr.h
index 89b73e5d0fd..a1865537339 100644
--- a/include/asm-generic/audit_change_attr.h
+++ b/include/asm-generic/audit_change_attr.h
@@ -4,9 +4,11 @@ __NR_chmod,
__NR_fchmod,
#ifdef __NR_chown
__NR_chown,
-__NR_fchown,
__NR_lchown,
#endif
+#ifdef __NR_fchown
+__NR_fchown,
+#endif
__NR_setxattr,
__NR_lsetxattr,
__NR_fsetxattr,
diff --git a/include/asm-generic/audit_write.h b/include/asm-generic/audit_write.h
index e7020c57b13..274575d7129 100644
--- a/include/asm-generic/audit_write.h
+++ b/include/asm-generic/audit_write.h
@@ -10,6 +10,12 @@ __NR_truncate,
#ifdef __NR_truncate64
__NR_truncate64,
#endif
+#ifdef __NR_ftruncate
+__NR_ftruncate,
+#endif
+#ifdef __NR_ftruncate64
+__NR_ftruncate64,
+#endif
#ifdef __NR_bind
__NR_bind, /* bind can affect fs object only in one way... */
#endif
diff --git a/include/linux/audit.h b/include/linux/audit.h
index a40641954c2..aa865a9a4c4 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -137,7 +137,7 @@ static inline void audit_syscall_exit(void *pt_regs)
{
if (unlikely(current->audit_context)) {
int success = is_syscall_success(pt_regs);
- int return_code = regs_return_value(pt_regs);
+ long return_code = regs_return_value(pt_regs);
__audit_syscall_exit(success, return_code);
}
@@ -202,7 +202,7 @@ static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
return tsk->loginuid;
}
-static inline int audit_get_sessionid(struct task_struct *tsk)
+static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
{
return tsk->sessionid;
}
@@ -220,7 +220,7 @@ extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
const struct cred *new,
const struct cred *old);
-extern void __audit_log_capset(pid_t pid, const struct cred *new, const struct cred *old);
+extern void __audit_log_capset(const struct cred *new, const struct cred *old);
extern void __audit_mmap_fd(int fd, int flags);
static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
@@ -285,11 +285,11 @@ static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
return 0;
}
-static inline void audit_log_capset(pid_t pid, const struct cred *new,
+static inline void audit_log_capset(const struct cred *new,
const struct cred *old)
{
if (unlikely(!audit_dummy_context()))
- __audit_log_capset(pid, new, old);
+ __audit_log_capset(new, old);
}
static inline void audit_mmap_fd(int fd, int flags)
@@ -359,7 +359,7 @@ static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
{
return INVALID_UID;
}
-static inline int audit_get_sessionid(struct task_struct *tsk)
+static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
{
return -1;
}
@@ -397,8 +397,8 @@ static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
{
return 0;
}
-static inline void audit_log_capset(pid_t pid, const struct cred *new,
- const struct cred *old)
+static inline void audit_log_capset(const struct cred *new,
+ const struct cred *old)
{ }
static inline void audit_mmap_fd(int fd, int flags)
{ }
@@ -461,9 +461,11 @@ extern int audit_update_lsm_rules(void);
/* Private API (for audit.c only) */
extern int audit_filter_user(int type);
extern int audit_filter_type(int type);
-extern int audit_receive_filter(int type, int pid, int seq,
+extern int audit_rule_change(int type, __u32 portid, int seq,
void *data, size_t datasz);
-extern int audit_enabled;
+extern int audit_list_rules_send(__u32 portid, int seq);
+
+extern u32 audit_enabled;
#else /* CONFIG_AUDIT */
static inline __printf(4, 5)
void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 1516a8ff8f9..6df7f9fe0d0 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -97,7 +97,7 @@ extern struct group_info init_groups;
#ifdef CONFIG_AUDITSYSCALL
#define INIT_IDS \
.loginuid = INVALID_UID, \
- .sessionid = -1,
+ .sessionid = (unsigned int)-1,
#else
#define INIT_IDS
#endif
diff --git a/include/net/netlabel.h b/include/net/netlabel.h
index 2c95d55f791..97e6dcaf12b 100644
--- a/include/net/netlabel.h
+++ b/include/net/netlabel.h
@@ -111,7 +111,7 @@ struct cipso_v4_doi;
struct netlbl_audit {
u32 secid;
kuid_t loginuid;
- u32 sessionid;
+ unsigned int sessionid;
};
/*
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 6b82fdf4ba7..1d535f4d387 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -681,7 +681,7 @@ struct xfrm_spi_skb_cb {
struct xfrm_audit {
u32 secid;
kuid_t loginuid;
- u32 sessionid;
+ unsigned int sessionid;
};
#ifdef CONFIG_AUDITSYSCALL
@@ -699,7 +699,7 @@ static inline struct audit_buffer *xfrm_audit_start(const char *op)
return audit_buf;
}
-static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
+static inline void xfrm_audit_helper_usrinfo(kuid_t auid, unsigned int ses, u32 secid,
struct audit_buffer *audit_buf)
{
char *secctx;
@@ -716,13 +716,13 @@ static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
}
void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, kuid_t auid,
- u32 ses, u32 secid);
+ unsigned int ses, u32 secid);
void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, kuid_t auid,
- u32 ses, u32 secid);
+ unsigned int ses, u32 secid);
void xfrm_audit_state_add(struct xfrm_state *x, int result, kuid_t auid,
- u32 ses, u32 secid);
+ unsigned int ses, u32 secid);
void xfrm_audit_state_delete(struct xfrm_state *x, int result, kuid_t auid,
- u32 ses, u32 secid);
+ unsigned int ses, u32 secid);
void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
struct sk_buff *skb);
void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
@@ -735,22 +735,22 @@ void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
#else
static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
- kuid_t auid, u32 ses, u32 secid)
+ kuid_t auid, unsigned int ses, u32 secid)
{
}
static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
- kuid_t auid, u32 ses, u32 secid)
+ kuid_t auid, unsigned int ses, u32 secid)
{
}
static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
- kuid_t auid, u32 ses, u32 secid)
+ kuid_t auid, unsigned int ses, u32 secid)
{
}
static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
- kuid_t auid, u32 ses, u32 secid)
+ kuid_t auid, unsigned int ses, u32 secid)
{
}
diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
index 44b05a09f19..2d48fe1274c 100644
--- a/include/uapi/linux/audit.h
+++ b/include/uapi/linux/audit.h
@@ -319,6 +319,12 @@ enum {
#define AUDIT_STATUS_PID 0x0004
#define AUDIT_STATUS_RATE_LIMIT 0x0008
#define AUDIT_STATUS_BACKLOG_LIMIT 0x0010
+#define AUDIT_STATUS_BACKLOG_WAIT_TIME 0x0020
+
+#define AUDIT_VERSION_BACKLOG_LIMIT 1
+#define AUDIT_VERSION_BACKLOG_WAIT_TIME 2
+#define AUDIT_VERSION_LATEST AUDIT_VERSION_BACKLOG_WAIT_TIME
+
/* Failure-to-log actions */
#define AUDIT_FAIL_SILENT 0
#define AUDIT_FAIL_PRINTK 1
@@ -375,6 +381,8 @@ struct audit_status {
__u32 backlog_limit; /* waiting messages limit */
__u32 lost; /* messages lost */
__u32 backlog; /* messages waiting in queue */
+ __u32 version; /* audit api version number */
+ __u32 backlog_wait_time;/* message queue wait timeout */
};
struct audit_features {
diff --git a/kernel/audit.c b/kernel/audit.c
index 906ae5a0233..34c5a2310fb 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -41,6 +41,8 @@
* Example user-space utilities: http://people.redhat.com/sgrubb/audit/
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/init.h>
#include <asm/types.h>
#include <linux/atomic.h>
@@ -63,6 +65,7 @@
#include <linux/freezer.h>
#include <linux/tty.h>
#include <linux/pid_namespace.h>
+#include <net/netns/generic.h>
#include "audit.h"
@@ -76,16 +79,16 @@ static int audit_initialized;
#define AUDIT_OFF 0
#define AUDIT_ON 1
#define AUDIT_LOCKED 2
-int audit_enabled;
-int audit_ever_enabled;
+u32 audit_enabled;
+u32 audit_ever_enabled;
EXPORT_SYMBOL_GPL(audit_enabled);
/* Default state when kernel boots without any parameters. */
-static int audit_default;
+static u32 audit_default;
/* If auditing cannot proceed, audit_failure selects what happens. */
-static int audit_failure = AUDIT_FAIL_PRINTK;
+static u32 audit_failure = AUDIT_FAIL_PRINTK;
/*
* If audit records are to be written to the netlink socket, audit_pid
@@ -93,17 +96,19 @@ static int audit_failure = AUDIT_FAIL_PRINTK;
* the portid to use to send netlink messages to that process.
*/
int audit_pid;
-static int audit_nlk_portid;
+static __u32 audit_nlk_portid;
/* If audit_rate_limit is non-zero, limit the rate of sending audit records
* to that number per second. This prevents DoS attacks, but results in
* audit records being dropped. */
-static int audit_rate_limit;
+static u32 audit_rate_limit;
-/* Number of outstanding audit_buffers allowed. */
-static int audit_backlog_limit = 64;
-static int audit_backlog_wait_time = 60 * HZ;
-static int audit_backlog_wait_overflow = 0;
+/* Number of outstanding audit_buffers allowed.
+ * When set to zero, this means unlimited. */
+static u32 audit_backlog_limit = 64;
+#define AUDIT_BACKLOG_WAIT_TIME (60 * HZ)
+static u32 audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME;
+static u32 audit_backlog_wait_overflow = 0;
/* The identity of the user shutting down the audit system. */
kuid_t audit_sig_uid = INVALID_UID;
@@ -121,6 +126,7 @@ static atomic_t audit_lost = ATOMIC_INIT(0);
/* The netlink socket. */
static struct sock *audit_sock;
+int audit_net_id;
/* Hash for inode-based rules */
struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
@@ -175,27 +181,27 @@ struct audit_buffer {
};
struct audit_reply {
- int pid;
+ __u32 portid;
+ pid_t pid;
struct sk_buff *skb;
};
-static void audit_set_pid(struct audit_buffer *ab, pid_t pid)
+static void audit_set_portid(struct audit_buffer *ab, __u32 portid)
{
if (ab) {
struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
- nlh->nlmsg_pid = pid;
+ nlh->nlmsg_pid = portid;
}
}
void audit_panic(const char *message)
{
- switch (audit_failure)
- {
+ switch (audit_failure) {
case AUDIT_FAIL_SILENT:
break;
case AUDIT_FAIL_PRINTK:
if (printk_ratelimit())
- printk(KERN_ERR "audit: %s\n", message);
+ pr_err("%s\n", message);
break;
case AUDIT_FAIL_PANIC:
/* test audit_pid since printk is always losey, why bother? */
@@ -266,9 +272,7 @@ void audit_log_lost(const char *message)
if (print) {
if (printk_ratelimit())
- printk(KERN_WARNING
- "audit: audit_lost=%d audit_rate_limit=%d "
- "audit_backlog_limit=%d\n",
+ pr_warn("audit_lost=%u audit_rate_limit=%u audit_backlog_limit=%u\n",
atomic_read(&audit_lost),
audit_rate_limit,
audit_backlog_limit);
@@ -276,7 +280,7 @@ void audit_log_lost(const char *message)
}
}
-static int audit_log_config_change(char *function_name, int new, int old,
+static int audit_log_config_change(char *function_name, u32 new, u32 old,
int allow_changes)
{
struct audit_buffer *ab;
@@ -285,7 +289,7 @@ static int audit_log_config_change(char *function_name, int new, int old,
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
if (unlikely(!ab))
return rc;
- audit_log_format(ab, "%s=%d old=%d", function_name, new, old);
+ audit_log_format(ab, "%s=%u old=%u", function_name, new, old);
audit_log_session_info(ab);
rc = audit_log_task_context(ab);
if (rc)
@@ -295,9 +299,10 @@ static int audit_log_config_change(char *function_name, int new, int old,
return rc;
}
-static int audit_do_config_change(char *function_name, int *to_change, int new)
+static int audit_do_config_change(char *function_name, u32 *to_change, u32 new)
{
- int allow_changes, rc = 0, old = *to_change;
+ int allow_changes, rc = 0;
+ u32 old = *to_change;
/* check if we are locked */
if (audit_enabled == AUDIT_LOCKED)
@@ -320,17 +325,23 @@ static int audit_do_config_change(char *function_name, int *to_change, int new)
return rc;
}
-static int audit_set_rate_limit(int limit)
+static int audit_set_rate_limit(u32 limit)
{
return audit_do_config_change("audit_rate_limit", &audit_rate_limit, limit);
}
-static int audit_set_backlog_limit(int limit)
+static int audit_set_backlog_limit(u32 limit)
{
return audit_do_config_change("audit_backlog_limit", &audit_backlog_limit, limit);
}
-static int audit_set_enabled(int state)
+static int audit_set_backlog_wait_time(u32 timeout)
+{
+ return audit_do_config_change("audit_backlog_wait_time",
+ &audit_backlog_wait_time, timeout);
+}
+
+static int audit_set_enabled(u32 state)
{
int rc;
if (state < AUDIT_OFF || state > AUDIT_LOCKED)
@@ -343,7 +354,7 @@ static int audit_set_enabled(int state)
return rc;
}
-static int audit_set_failure(int state)
+static int audit_set_failure(u32 state)
{
if (state != AUDIT_FAIL_SILENT
&& state != AUDIT_FAIL_PRINTK
@@ -365,7 +376,8 @@ static int audit_set_failure(int state)
static void audit_hold_skb(struct sk_buff *skb)
{
if (audit_default &&
- skb_queue_len(&audit_skb_hold_queue) < audit_backlog_limit)
+ (!audit_backlog_limit ||
+ skb_queue_len(&audit_skb_hold_queue) < audit_backlog_limit))
skb_queue_tail(&audit_skb_hold_queue, skb);
else
kfree_skb(skb);
@@ -382,7 +394,7 @@ static void audit_printk_skb(struct sk_buff *skb)
if (nlh->nlmsg_type != AUDIT_EOE) {
if (printk_ratelimit())
- printk(KERN_NOTICE "type=%d %s\n", nlh->nlmsg_type, data);
+ pr_notice("type=%d %s\n", nlh->nlmsg_type, data);
else
audit_log_lost("printk limit exceeded\n");
}
@@ -398,9 +410,12 @@ static void kauditd_send_skb(struct sk_buff *skb)
err = netlink_unicast(audit_sock, skb, audit_nlk_portid, 0);
if (err < 0) {
BUG_ON(err != -ECONNREFUSED); /* Shouldn't happen */
- printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n", audit_pid);
- audit_log_lost("auditd disappeared\n");
- audit_pid = 0;
+ if (audit_pid) {
+ pr_err("*NO* daemon at audit_pid=%d\n", audit_pid);
+ audit_log_lost("auditd disappeared\n");
+ audit_pid = 0;
+ audit_sock = NULL;
+ }
/* we might get lucky and get this in the next auditd */
audit_hold_skb(skb);
} else
@@ -457,8 +472,10 @@ static int kauditd_thread(void *dummy)
flush_hold_queue();
skb = skb_dequeue(&audit_skb_queue);
- wake_up(&audit_backlog_wait);
+
if (skb) {
+ if (skb_queue_len(&audit_skb_queue) <= audit_backlog_limit)
+ wake_up(&audit_backlog_wait);
if (audit_pid)
kauditd_send_skb(skb);
else
@@ -482,22 +499,23 @@ static int kauditd_thread(void *dummy)
int audit_send_list(void *_dest)
{
struct audit_netlink_list *dest = _dest;
- int pid = dest->pid;
struct sk_buff *skb;
+ struct net *net = get_net_ns_by_pid(dest->pid);
+ struct audit_net *aunet = net_generic(net, audit_net_id);
/* wait for parent to finish and send an ACK */
mutex_lock(&audit_cmd_mutex);
mutex_unlock(&audit_cmd_mutex);
while ((skb = __skb_dequeue(&dest->q)) != NULL)
- netlink_unicast(audit_sock, skb, pid, 0);
+ netlink_unicast(aunet->nlsk, skb, dest->portid, 0);
kfree(dest);
return 0;
}
-struct sk_buff *audit_make_reply(int pid, int seq, int type, int done,
+struct sk_buff *audit_make_reply(__u32 portid, int seq, int type, int done,
int multi, const void *payload, int size)
{
struct sk_buff *skb;
@@ -510,7 +528,7 @@ struct sk_buff *audit_make_reply(int pid, int seq, int type, int done,
if (!skb)
return NULL;
- nlh = nlmsg_put(skb, pid, seq, t, size, flags);
+ nlh = nlmsg_put(skb, portid, seq, t, size, flags);
if (!nlh)
goto out_kfree_skb;
data = nlmsg_data(nlh);
@@ -525,19 +543,21 @@ out_kfree_skb:
static int audit_send_reply_thread(void *arg)
{
struct audit_reply *reply = (struct audit_reply *)arg;
+ struct net *net = get_net_ns_by_pid(reply->pid);
+ struct audit_net *aunet = net_generic(net, audit_net_id);
mutex_lock(&audit_cmd_mutex);
mutex_unlock(&audit_cmd_mutex);
/* Ignore failure. It'll only happen if the sender goes away,
because our timeout is set to infinite. */
- netlink_unicast(audit_sock, reply->skb, reply->pid, 0);
+ netlink_unicast(aunet->nlsk , reply->skb, reply->portid, 0);
kfree(reply);
return 0;
}
/**
* audit_send_reply - send an audit reply message via netlink
- * @pid: process id to send reply to
+ * @portid: netlink port to which to send reply
* @seq: sequence number
* @type: audit message type
* @done: done (last) flag
@@ -545,11 +565,11 @@ static int audit_send_reply_thread(void *arg)
* @payload: payload data
* @size: payload size
*
- * Allocates an skb, builds the netlink message, and sends it to the pid.
+ * Allocates an skb, builds the netlink message, and sends it to the port id.
* No failure notifications.
*/
-static void audit_send_reply(int pid, int seq, int type, int done, int multi,
- const void *payload, int size)
+static void audit_send_reply(__u32 portid, int seq, int type, int done,
+ int multi, const void *payload, int size)
{
struct sk_buff *skb;
struct task_struct *tsk;
@@ -559,11 +579,12 @@ static void audit_send_reply(int pid, int seq, int type, int done, int multi,
if (!reply)
return;
- skb = audit_make_reply(pid, seq, type, done, multi, payload, size);
+ skb = audit_make_reply(portid, seq, type, done, multi, payload, size);
if (!skb)
goto out;
- reply->pid = pid;
+ reply->portid = portid;
+ reply->pid = task_pid_vnr(current);
reply->skb = skb;
tsk = kthread_run(audit_send_reply_thread, reply, "audit_send_reply");
@@ -663,8 +684,12 @@ static void audit_log_feature_change(int which, u32 old_feature, u32 new_feature
{
struct audit_buffer *ab;
+ if (audit_enabled == AUDIT_OFF)
+ return;
+
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_FEATURE_CHANGE);
- audit_log_format(ab, "feature=%s new=%d old=%d old_lock=%d new_lock=%d res=%d",
+ audit_log_task_info(ab, current);
+ audit_log_format(ab, "feature=%s old=%u new=%u old_lock=%u new_lock=%u res=%d",
audit_feature_names[which], !!old_feature, !!new_feature,
!!old_lock, !!new_lock, res);
audit_log_end(ab);
@@ -694,7 +719,7 @@ static int audit_set_feature(struct sk_buff *skb)
old_lock = af.lock & feature;
/* are we changing a locked feature? */
- if ((af.lock & feature) && (new_feature != old_feature)) {
+ if (old_lock && (new_feature != old_feature)) {
audit_log_feature_change(i, old_feature, new_feature,
old_lock, new_lock, 0);
return -EPERM;
@@ -732,7 +757,6 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
u32 seq;
void *data;
- struct audit_status *status_get, status_set;
int err;
struct audit_buffer *ab;
u16 msg_type = nlh->nlmsg_type;
@@ -758,48 +782,70 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
data = nlmsg_data(nlh);
switch (msg_type) {
- case AUDIT_GET:
- memset(&status_set, 0, sizeof(status_set));
- status_set.enabled = audit_enabled;
- status_set.failure = audit_failure;
- status_set.pid = audit_pid;
- status_set.rate_limit = audit_rate_limit;
- status_set.backlog_limit = audit_backlog_limit;
- status_set.lost = atomic_read(&audit_lost);
- status_set.backlog = skb_queue_len(&audit_skb_queue);
+ case AUDIT_GET: {
+ struct audit_status s;
+ memset(&s, 0, sizeof(s));
+ s.enabled = audit_enabled;
+ s.failure = audit_failure;
+ s.pid = audit_pid;
+ s.rate_limit = audit_rate_limit;
+ s.backlog_limit = audit_backlog_limit;
+ s.lost = atomic_read(&audit_lost);
+ s.backlog = skb_queue_len(&audit_skb_queue);
+ s.version = AUDIT_VERSION_LATEST;
+ s.backlog_wait_time = audit_backlog_wait_time;
audit_send_reply(NETLINK_CB(skb).portid, seq, AUDIT_GET, 0, 0,
- &status_set, sizeof(status_set));
+ &s, sizeof(s));
break;
- case AUDIT_SET:
- if (nlmsg_len(nlh) < sizeof(struct audit_status))
- return -EINVAL;
- status_get = (struct audit_status *)data;
- if (status_get->mask & AUDIT_STATUS_ENABLED) {
- err = audit_set_enabled(status_get->enabled);
+ }
+ case AUDIT_SET: {
+ struct audit_status s;
+ memset(&s, 0, sizeof(s));
+ /* guard against past and future API changes */
+ memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
+ if (s.mask & AUDIT_STATUS_ENABLED) {
+ err = audit_set_enabled(s.enabled);
if (err < 0)
return err;
}
- if (status_get->mask & AUDIT_STATUS_FAILURE) {
- err = audit_set_failure(status_get->failure);
+ if (s.mask & AUDIT_STATUS_FAILURE) {
+ err = audit_set_failure(s.failure);
if (err < 0)
return err;
}
- if (status_get->mask & AUDIT_STATUS_PID) {
- int new_pid = status_get->pid;
+ if (s.mask & AUDIT_STATUS_PID) {
+ int new_pid = s.pid;
+ if ((!new_pid) && (task_tgid_vnr(current) != audit_pid))
+ return -EACCES;
if (audit_enabled != AUDIT_OFF)
audit_log_config_change("audit_pid", new_pid, audit_pid, 1);
audit_pid = new_pid;
audit_nlk_portid = NETLINK_CB(skb).portid;
+ audit_sock = skb->sk;
}
- if (status_get->mask & AUDIT_STATUS_RATE_LIMIT) {
- err = audit_set_rate_limit(status_get->rate_limit);
+ if (s.mask & AUDIT_STATUS_RATE_LIMIT) {
+ err = audit_set_rate_limit(s.rate_limit);
+ if (err < 0)
+ return err;
+ }
+ if (s.mask & AUDIT_STATUS_BACKLOG_LIMIT) {
+ err = audit_set_backlog_limit(s.backlog_limit);
+ if (err < 0)
+ return err;
+ }
+ if (s.mask & AUDIT_STATUS_BACKLOG_WAIT_TIME) {
+ if (sizeof(s) > (size_t)nlh->nlmsg_len)
+ return -EINVAL;
+ if (s.backlog_wait_time < 0 ||
+ s.backlog_wait_time > 10*AUDIT_BACKLOG_WAIT_TIME)
+ return -EINVAL;
+ err = audit_set_backlog_wait_time(s.backlog_wait_time);
if (err < 0)
return err;
}
- if (status_get->mask & AUDIT_STATUS_BACKLOG_LIMIT)
- err = audit_set_backlog_limit(status_get->backlog_limit);
break;
+ }
case AUDIT_GET_FEATURE:
err = audit_get_feature(skb);
if (err)
@@ -817,13 +863,14 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
return 0;
err = audit_filter_user(msg_type);
- if (err == 1) {
+ if (err == 1) { /* match or error */
err = 0;
if (msg_type == AUDIT_USER_TTY) {
err = tty_audit_push_current();
if (err)
break;
}
+ mutex_unlock(&audit_cmd_mutex);
audit_log_common_recv_msg(&ab, msg_type);
if (msg_type != AUDIT_USER_TTY)
audit_log_format(ab, " msg='%.*s'",
@@ -839,8 +886,9 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
size--;
audit_log_n_untrustedstring(ab, data, size);
}
- audit_set_pid(ab, NETLINK_CB(skb).portid);
+ audit_set_portid(ab, NETLINK_CB(skb).portid);
audit_log_end(ab);
+ mutex_lock(&audit_cmd_mutex);
}
break;
case AUDIT_ADD_RULE:
@@ -853,11 +901,12 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
audit_log_end(ab);
return -EPERM;
}
- /* fallthrough */
- case AUDIT_LIST_RULES:
- err = audit_receive_filter(msg_type, NETLINK_CB(skb).portid,
+ err = audit_rule_change(msg_type, NETLINK_CB(skb).portid,
seq, data, nlmsg_len(nlh));
break;
+ case AUDIT_LIST_RULES:
+ err = audit_list_rules_send(NETLINK_CB(skb).portid, seq);
+ break;
case AUDIT_TRIM:
audit_trim_trees();
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
@@ -939,20 +988,33 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
break;
}
case AUDIT_TTY_SET: {
- struct audit_tty_status s;
+ struct audit_tty_status s, old;
struct task_struct *tsk = current;
+ struct audit_buffer *ab;
memset(&s, 0, sizeof(s));
/* guard against past and future API changes */
memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
+ /* check if new data is valid */
if ((s.enabled != 0 && s.enabled != 1) ||
(s.log_passwd != 0 && s.log_passwd != 1))
- return -EINVAL;
+ err = -EINVAL;
spin_lock(&tsk->sighand->siglock);
- tsk->signal->audit_tty = s.enabled;
- tsk->signal->audit_tty_log_passwd = s.log_passwd;
+ old.enabled = tsk->signal->audit_tty;
+ old.log_passwd = tsk->signal->audit_tty_log_passwd;
+ if (!err) {
+ tsk->signal->audit_tty = s.enabled;
+ tsk->signal->audit_tty_log_passwd = s.log_passwd;
+ }
spin_unlock(&tsk->sighand->siglock);
+
+ audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
+ audit_log_format(ab, " op=tty_set old-enabled=%d new-enabled=%d"
+ " old-log_passwd=%d new-log_passwd=%d res=%d",
+ old.enabled, s.enabled, old.log_passwd,
+ s.log_passwd, !err);
+ audit_log_end(ab);
break;
}
default:
@@ -998,24 +1060,55 @@ static void audit_receive(struct sk_buff *skb)
mutex_unlock(&audit_cmd_mutex);
}
-/* Initialize audit support at boot time. */
-static int __init audit_init(void)
+static int __net_init audit_net_init(struct net *net)
{
- int i;
struct netlink_kernel_cfg cfg = {
.input = audit_receive,
};
+ struct audit_net *aunet = net_generic(net, audit_net_id);
+
+ aunet->nlsk = netlink_kernel_create(net, NETLINK_AUDIT, &cfg);
+ if (aunet->nlsk == NULL) {
+ audit_panic("cannot initialize netlink socket in namespace");
+ return -ENOMEM;
+ }
+ aunet->nlsk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
+ return 0;
+}
+
+static void __net_exit audit_net_exit(struct net *net)
+{
+ struct audit_net *aunet = net_generic(net, audit_net_id);
+ struct sock *sock = aunet->nlsk;
+ if (sock == audit_sock) {
+ audit_pid = 0;
+ audit_sock = NULL;
+ }
+
+ rcu_assign_pointer(aunet->nlsk, NULL);
+ synchronize_net();
+ netlink_kernel_release(sock);
+}
+
+static struct pernet_operations audit_net_ops __net_initdata = {
+ .init = audit_net_init,
+ .exit = audit_net_exit,
+ .id = &audit_net_id,
+ .size = sizeof(struct audit_net),
+};
+
+/* Initialize audit support at boot time. */
+static int __init audit_init(void)
+{
+ int i;
+
if (audit_initialized == AUDIT_DISABLED)
return 0;
- printk(KERN_INFO "audit: initializing netlink socket (%s)\n",
- audit_default ? "enabled" : "disabled");
- audit_sock = netlink_kernel_create(&init_net, NETLINK_AUDIT, &cfg);
- if (!audit_sock)
- audit_panic("cannot initialize netlink socket");
- else
- audit_sock->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
+ pr_info("initializing netlink subsys (%s)\n",
+ audit_default ? "enabled" : "disabled");
+ register_pernet_subsys(&audit_net_ops);
skb_queue_head_init(&audit_skb_queue);
skb_queue_head_init(&audit_skb_hold_queue);
@@ -1039,22 +1132,32 @@ static int __init audit_enable(char *str)
if (!audit_default)
audit_initialized = AUDIT_DISABLED;
- printk(KERN_INFO "audit: %s", audit_default ? "enabled" : "disabled");
+ pr_info("%s\n", audit_default ?
+ "enabled (after initialization)" : "disabled (until reboot)");
- if (audit_initialized == AUDIT_INITIALIZED) {
- audit_enabled = audit_default;
- audit_ever_enabled |= !!audit_default;
- } else if (audit_initialized == AUDIT_UNINITIALIZED) {
- printk(" (after initialization)");
- } else {
- printk(" (until reboot)");
+ return 1;
+}
+__setup("audit=", audit_enable);
+
+/* Process kernel command-line parameter at boot time.
+ * audit_backlog_limit=<n> */
+static int __init audit_backlog_limit_set(char *str)
+{
+ u32 audit_backlog_limit_arg;
+
+ pr_info("audit_b