svn commit: r284759 - stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Andriy Gapon]

Author: avg
Date: Wed Jun 24 14:39:38 2015
New Revision: 284759
URL: https://svnweb.freebsd.org/changeset/base/284759

Log:
  MFC r284303: MFV r283534: 5515 dataset user hold doesn't reject empty tags

Modified:
  stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
Directory Properties:
  stable/9/sys/   (props changed)
  stable/9/sys/cddl/contrib/opensolaris/   (props changed)

Modified: stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
==============================================================================
--- stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c	Wed Jun 24 14:39:26 2015	(r284758)
+++ stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c	Wed Jun 24 14:39:38 2015	(r284759)
@@ -24,7 +24,7 @@
  * Copyright (c) 2011-2012 Pawel Jakub Dawidek <pawel at dawidek.net>.
  * All rights reserved.
  * Copyright 2013 Martin Matuska <mm at FreeBSD.org>. All rights reserved.
- * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ * Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 2014, Joyent, Inc. All rights reserved.
  * Copyright (c) 2013 by Delphix. All rights reserved.
  * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
@@ -5200,6 +5200,7 @@ zfs_ioc_smb_acl(zfs_cmd_t *zc)
 static int
 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
 {
+	nvpair_t *pair;
 	nvlist_t *holds;
 	int cleanup_fd = -1;
 	int error;
@@ -5209,6 +5210,19 @@ zfs_ioc_hold(const char *pool, nvlist_t 
 	if (error != 0)
 		return (SET_ERROR(EINVAL));
 
+	/* make sure the user didn't pass us any invalid (empty) tags */
+	for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
+	    pair = nvlist_next_nvpair(holds, pair)) {
+		char *htag;
+
+		error = nvpair_value_string(pair, &htag);
+		if (error != 0)
+			return (SET_ERROR(error));
+
+		if (strlen(htag) == 0)
+			return (SET_ERROR(EINVAL));
+	}
+
 	if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
 		error = zfs_onexit_fd_hold(cleanup_fd, &minor);
 		if (error != 0)