svn commit: r277293 - user/dchagin/lemul/sys/compat/linux

[Dmitry Chagin]

Author: dchagin
Date: Sat Jan 17 08:24:40 2015
New Revision: 277293
URL: https://svnweb.freebsd.org/changeset/base/277293

Log:
  Check that user supplied epfd file descriptor is a kqueue file descriptor
  a bit earlier as in epoll_to_kevent() we use epoll.
  
  Reported by:    trinity

Modified:
  user/dchagin/lemul/sys/compat/linux/linux_event.c

Modified: user/dchagin/lemul/sys/compat/linux/linux_event.c
==============================================================================
--- user/dchagin/lemul/sys/compat/linux/linux_event.c	Sat Jan 17 08:14:46 2015	(r277292)
+++ user/dchagin/lemul/sys/compat/linux/linux_event.c	Sat Jan 17 08:24:40 2015	(r277293)
@@ -402,6 +402,8 @@ linux_epoll_ctl(struct thread *td, struc
 	    cap_rights_init(&rights, CAP_KQUEUE_CHANGE), &epfp);
 	if (error != 0)
 		return (error);
+	if (epfp->f_type != DTYPE_KQUEUE)
+		goto leave1;
 
 	 /* Protect user data vector from incorrectly supplied fd. */
 	error = fget(td, args->fd, cap_rights_init(&rights, CAP_POLL_EVENT), &fp);