From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Sun, 10 Sep 2017 06:01:31 +0000 (+0200)
Subject: lxc-unshare: do not pass NULL pointer
X-Git-Tag: lxc-2.0.9~31
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8283b0e57a205029fd3118e8408890ba13797eb4;p=thirdparty%2Flxc.git

lxc-unshare: do not pass NULL pointer

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/tools/lxc_unshare.c b/src/lxc/tools/lxc_unshare.c
index a0f943fd5..b6b7f4ca5 100644
--- a/src/lxc/tools/lxc_unshare.c
+++ b/src/lxc/tools/lxc_unshare.c
@@ -228,6 +228,9 @@ int main(int argc, char *argv[])
 	 *	dest: del + 1 == OUNT|PID
 	 *	src:  del + 3 == NT|PID
 	 */
+	if (!namespaces)
+		usage(argv[0]);
+
 	while ((del = strstr(namespaces, "MOUNT")))
 		memmove(del + 1, del + 3, strlen(del) - 2);