From 9c7da9a95aaaecced0a1cfc40190906e7a691327 Mon Sep 17 00:00:00 2001
From: Tulsi Jain <TulsiJain@users.noreply.github.com>
Date: Thu, 13 Jun 2019 08:56:15 -0700
Subject: Restrict filesystem creation if name referred either '.' or '..'

This change restricts filesystem creation if the given name
contains either '.' or '..'

Reviewed-by: Matt Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com>
Signed-off-by: TulsiJain <tulsi.jain@delphix.com>
Closes #8842
Closes #8564
---
 lib/libzfs/libzfs_dataset.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'lib')

diff --git a/lib/libzfs/libzfs_dataset.c b/lib/libzfs/libzfs_dataset.c
index 93af50b99..3be205f1f 100644
--- a/lib/libzfs/libzfs_dataset.c
+++ b/lib/libzfs/libzfs_dataset.c
@@ -197,6 +197,16 @@ zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 				    "reserved disk name"));
 				break;
 
+			case NAME_ERR_SELF_REF:
+				zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
+				    "self reference, '.' is found in name"));
+				break;
+
+			case NAME_ERR_PARENT_REF:
+				zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
+				    "parent reference, '..' is found in name"));
+				break;
+
 			default:
 				zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 				    "(%d) not defined"), why);
-- 
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