From 7e150f68e666e331e6b970e2ceae1a6a88743bfd Mon Sep 17 00:00:00 2001
From: =?utf8?q?Leonardo=20M=C3=B6rlein?= <me@irrelefant.net>
Date: Fri, 8 May 2020 02:58:25 +0200
Subject: [PATCH] jail: unnamed jails can not have netns (fix segfault)
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

Signed-off-by: Leonardo Mörlein <me@irrelefant.net>
---
 jail/jail.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/jail/jail.c b/jail/jail.c
index 67d4cad..a52c264 100644
--- a/jail/jail.c
+++ b/jail/jail.c
@@ -841,6 +841,10 @@ int main(int argc, char **argv)
 		}
 
 		if (opts.namespace & CLONE_NEWNET) {
+			if (!opts.name) {
+				ERROR("netns needs a named jail\n");
+				return -1;
+			}
 			netns_fd = netns_open_pid(jail_process.pid);
 			netns_updown(jail_process.pid, true);
 		}
-- 
2.30.2