svn commit: r253887 - head/sys/dev/filemon

[Hiroki Sato]

Author: hrs
Date: Fri Aug  2 14:44:11 2013
New Revision: 253887
URL: http://svnweb.freebsd.org/changeset/base/253887

Log:
  Add p_candebug() check to FILEMON_SET_PID ioctl.
  
  Discussed with:	sjg
  MFC after:	3 days

Modified:
  head/sys/dev/filemon/filemon.c

Modified: head/sys/dev/filemon/filemon.c
==============================================================================
--- head/sys/dev/filemon/filemon.c	Fri Aug  2 14:14:23 2013	(r253886)
+++ head/sys/dev/filemon/filemon.c	Fri Aug  2 14:44:11 2013	(r253887)
@@ -150,6 +150,7 @@ filemon_ioctl(struct cdev *dev, u_long c
 {
 	int error = 0;
 	struct filemon *filemon;
+	struct proc *p;
 
 	devfs_get_cdevpriv((void **) &filemon);
 
@@ -163,7 +164,13 @@ filemon_ioctl(struct cdev *dev, u_long c
 
 	/* Set the monitored process ID. */
 	case FILEMON_SET_PID:
-		filemon->pid = *((pid_t *)data);
+		p = pfind(*((pid_t *)data));
+		if (p == NULL)
+			return (EINVAL);
+		error = p_candebug(curthread, p);
+		if (error == 0)
+			filemon->pid = p->p_pid;
+		PROC_UNLOCK(p);
 		break;
 
 	default: