From: Tycho Andersen <tycho@tycho.ws>
Date: Fri, 2 Nov 2018 20:18:21 +0000 (-0600)
Subject: dlm: don't allow zero length names
X-Git-Tag: rel_imx_5.10.35_2.0.0-somdevices.0~5659^2~11
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=3f0806d2596de0a9ec381f37f97f6f5dbf1c6366;p=linux.git

dlm: don't allow zero length names

kobject doesn't like zero length object names, so let's test for that.

Signed-off-by: Tycho Andersen <tycho@tycho.ws>
Signed-off-by: David Teigland <teigland@redhat.com>
---

diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 5ba94be006ee..7b9d47fe7a34 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -431,7 +431,7 @@ static int new_lockspace(const char *name, const char *cluster,
 	int do_unreg = 0;
 	int namelen = strlen(name);
 
-	if (namelen > DLM_LOCKSPACE_LEN)
+	if (namelen > DLM_LOCKSPACE_LEN || namelen == 0)
 		return -EINVAL;
 
 	if (!lvblen || (lvblen % 8))