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path: root/drivers/char/tty_audit.c
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Diffstat (limited to 'drivers/char/tty_audit.c')
-rw-r--r--drivers/char/tty_audit.c76
1 files changed, 61 insertions, 15 deletions
diff --git a/drivers/char/tty_audit.c b/drivers/char/tty_audit.c
index 5787249..34ab6d7 100644
--- a/drivers/char/tty_audit.c
+++ b/drivers/char/tty_audit.c
@@ -67,6 +67,29 @@ static void tty_audit_buf_put(struct tty_audit_buf *buf)
tty_audit_buf_free(buf);
}
+static void tty_audit_log(const char *description, struct task_struct *tsk,
+ uid_t loginuid, unsigned sessionid, int major,
+ int minor, unsigned char *data, size_t size)
+{
+ struct audit_buffer *ab;
+
+ ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
+ if (ab) {
+ char name[sizeof(tsk->comm)];
+ uid_t uid = task_uid(tsk);
+
+ audit_log_format(ab, "%s pid=%u uid=%u auid=%u ses=%u "
+ "major=%d minor=%d comm=", description,
+ tsk->pid, uid, loginuid, sessionid,
+ major, minor);
+ get_task_comm(name, tsk);
+ audit_log_untrustedstring(ab, name);
+ audit_log_format(ab, " data=");
+ audit_log_n_hex(ab, data, size);
+ audit_log_end(ab);
+ }
+}
+
/**
* tty_audit_buf_push - Push buffered data out
*
@@ -77,25 +100,12 @@ static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
unsigned int sessionid,
struct tty_audit_buf *buf)
{
- struct audit_buffer *ab;
-
if (buf->valid == 0)
return;
if (audit_enabled == 0)
return;
- ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
- if (ab) {
- char name[sizeof(tsk->comm)];
-
- audit_log_format(ab, "tty pid=%u uid=%u auid=%u ses=%u "
- "major=%d minor=%d comm=", tsk->pid, tsk->uid,
- loginuid, sessionid, buf->major, buf->minor);
- get_task_comm(name, tsk);
- audit_log_untrustedstring(ab, name);
- audit_log_format(ab, " data=");
- audit_log_n_hex(ab, buf->data, buf->valid);
- audit_log_end(ab);
- }
+ tty_audit_log("tty", tsk, loginuid, sessionid, buf->major, buf->minor,
+ buf->data, buf->valid);
buf->valid = 0;
}
@@ -150,6 +160,42 @@ void tty_audit_fork(struct signal_struct *sig)
}
/**
+ * tty_audit_tiocsti - Log TIOCSTI
+ */
+void tty_audit_tiocsti(struct tty_struct *tty, char ch)
+{
+ struct tty_audit_buf *buf;
+ int major, minor, should_audit;
+
+ spin_lock_irq(&current->sighand->siglock);
+ should_audit = current->signal->audit_tty;
+ buf = current->signal->tty_audit_buf;
+ if (buf)
+ atomic_inc(&buf->count);
+ spin_unlock_irq(&current->sighand->siglock);
+
+ major = tty->driver->major;
+ minor = tty->driver->minor_start + tty->index;
+ if (buf) {
+ mutex_lock(&buf->mutex);
+ if (buf->major == major && buf->minor == minor)
+ tty_audit_buf_push_current(buf);
+ mutex_unlock(&buf->mutex);
+ tty_audit_buf_put(buf);
+ }
+
+ if (should_audit && audit_enabled) {
+ uid_t auid;
+ unsigned int sessionid;
+
+ auid = audit_get_loginuid(current);
+ sessionid = audit_get_sessionid(current);
+ tty_audit_log("ioctl=TIOCSTI", current, auid, sessionid, major,
+ minor, &ch, 1);
+ }
+}
+
+/**
* tty_audit_push_task - Flush task's pending audit data
*/
void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid, u32 sessionid)
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