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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 22 Jul 2016 17:22:38 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r303192 - stable/11/sys/kern
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Author: kib
Date: Fri Jul 22 17:22:37 2016
New Revision: 303192
URL: https://svnweb.freebsd.org/changeset/base/303192

Log:
  MFC r302893:
  Do not allow creation of char or block special nodes with VNOVAL dev_t.
  
  Approved by:	re (gjb)

Modified:
  stable/11/sys/kern/vfs_syscalls.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/kern/vfs_syscalls.c
==============================================================================
--- stable/11/sys/kern/vfs_syscalls.c	Fri Jul 22 16:48:39 2016	(r303191)
+++ stable/11/sys/kern/vfs_syscalls.c	Fri Jul 22 17:22:37 2016	(r303192)
@@ -1167,6 +1167,8 @@ kern_mknodat(struct thread *td, int fd, 
 	case S_IFCHR:
 	case S_IFBLK:
 		error = priv_check(td, PRIV_VFS_MKNOD_DEV);
+		if (error == 0 && dev == VNOVAL)
+			error = EINVAL;
 		break;
 	case S_IFMT:
 		error = priv_check(td, PRIV_VFS_MKNOD_BAD);