*
* Written by Rickard E. (Rik) Faith <faith@redhat.com>
*
- * Goals: 1) Integrate fully with SELinux.
+ * Goals: 1) Integrate fully with Security Modules.
* 2) Minimal run-time overhead:
* a) Minimal when syscall auditing is disabled (audit_enable=0).
* b) Small when syscall auditing is enabled and no audit record
#include <net/netlink.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
-#include <linux/selinux.h>
#include <linux/inotify.h>
#include <linux/freezer.h>
#include <linux/tty.h>
/* If auditing cannot proceed, audit_failure selects what happens. */
static int audit_failure = AUDIT_FAIL_PRINTK;
-/* If audit records are to be written to the netlink socket, audit_pid
- * contains the (non-zero) pid. */
+/*
+ * If audit records are to be written to the netlink socket, audit_pid
+ * contains the pid of the auditd process and audit_nlk_pid contains
+ * the pid to use to send netlink messages to that process.
+ */
int audit_pid;
+static int audit_nlk_pid;
/* 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
printk(KERN_ERR "audit: %s\n", message);
break;
case AUDIT_FAIL_PANIC:
- panic("audit: %s\n", message);
+ /* test audit_pid since printk is always losey, why bother? */
+ if (audit_pid)
+ panic("audit: %s\n", message);
break;
}
}
char *ctx = NULL;
u32 len;
- rc = selinux_sid_to_string(sid, &ctx, &len);
+ rc = security_secid_to_secctx(sid, &ctx, &len);
if (rc) {
audit_log_format(ab, " sid=%u", sid);
allow_changes = 0; /* Something weird, deny request */
} else {
audit_log_format(ab, " subj=%s", ctx);
- kfree(ctx);
+ security_release_secctx(ctx, len);
}
}
audit_log_format(ab, " res=%d", allow_changes);
wake_up(&audit_backlog_wait);
if (skb) {
if (audit_pid) {
- int err = netlink_unicast(audit_sock, skb, audit_pid, 0);
+ int err = netlink_unicast(audit_sock, skb, audit_nlk_pid, 0);
if (err < 0) {
BUG_ON(err != -ECONNREFUSED); /* Shoudn't happen */
printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n", audit_pid);
+ audit_log_lost("auditd dissapeared\n");
audit_pid = 0;
}
} else {
audit_log_format(*ab, "user pid=%d uid=%u auid=%u",
pid, uid, auid);
if (sid) {
- rc = selinux_sid_to_string(sid, &ctx, &len);
+ rc = security_secid_to_secctx(sid, &ctx, &len);
if (rc)
audit_log_format(*ab, " ssid=%u", sid);
- else
+ else {
audit_log_format(*ab, " subj=%s", ctx);
- kfree(ctx);
+ security_release_secctx(ctx, len);
+ }
}
return rc;
sid, 1);
audit_pid = new_pid;
+ audit_nlk_pid = NETLINK_CB(skb).pid;
}
if (status_get->mask & AUDIT_STATUS_RATE_LIMIT)
err = audit_set_rate_limit(status_get->rate_limit,
break;
}
case AUDIT_SIGNAL_INFO:
- err = selinux_sid_to_string(audit_sig_sid, &ctx, &len);
+ err = security_secid_to_secctx(audit_sig_sid, &ctx, &len);
if (err)
return err;
sig_data = kmalloc(sizeof(*sig_data) + len, GFP_KERNEL);
if (!sig_data) {
- kfree(ctx);
+ security_release_secctx(ctx, len);
return -ENOMEM;
}
sig_data->uid = audit_sig_uid;
sig_data->pid = audit_sig_pid;
memcpy(sig_data->ctx, ctx, len);
- kfree(ctx);
+ security_release_secctx(ctx, len);
audit_send_reply(NETLINK_CB(skb).pid, seq, AUDIT_SIGNAL_INFO,
0, 0, sig_data, sizeof(*sig_data) + len);
kfree(sig_data);
audit_enabled = audit_default;
audit_ever_enabled |= !!audit_default;
- /* Register the callback with selinux. This callback will be invoked
- * when a new policy is loaded. */
- selinux_audit_set_callback(&selinux_audit_rule_update);
-
audit_log(NULL, GFP_KERNEL, AUDIT_KERNEL, "initialized");
#ifdef CONFIG_AUDITSYSCALL
/**
* audit_string_contains_control - does a string need to be logged in hex
- * @string - string to be checked
- * @len - max length of the string to check
+ * @string: string to be checked
+ * @len: max length of the string to check
*/
int audit_string_contains_control(const char *string, size_t len)
{
/**
* audit_log_n_untrustedstring - log a string that may contain random characters
* @ab: audit_buffer
- * @len: lenth of string (not including trailing null)
+ * @len: length of string (not including trailing null)
* @string: string to be logged
*
* This code will escape a string that is passed to it if the string
if (!audit_rate_check()) {
audit_log_lost("rate limit exceeded");
} else {
+ struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
if (audit_pid) {
- struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
nlh->nlmsg_len = ab->skb->len - NLMSG_SPACE(0);
skb_queue_tail(&audit_skb_queue, ab->skb);
ab->skb = NULL;
wake_up_interruptible(&kauditd_wait);
- } else if (printk_ratelimit()) {
- struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
- printk(KERN_NOTICE "type=%d %s\n", nlh->nlmsg_type, ab->skb->data + NLMSG_SPACE(0));
- } else {
- audit_log_lost("printk limit exceeded\n");
+ } else if (nlh->nlmsg_type != AUDIT_EOE) {
+ if (printk_ratelimit()) {
+ printk(KERN_NOTICE "type=%d %s\n",
+ nlh->nlmsg_type,
+ ab->skb->data + NLMSG_SPACE(0));
+ } else
+ audit_log_lost("printk limit exceeded\n");
}
}
audit_buffer_free(ab);