From: Oliver Matthews <oliver@codersoffortune.net>
Date: Sun, 25 Sep 2016 08:37:43 +0000 (+0100)
Subject: Fix null derefence if attach is called without access to any tty
X-Git-Tag: lxc-2.1.0~316^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F1206%2Fhead;p=thirdparty%2Flxc.git

Fix null derefence if attach is called without access to any tty

Signed-off-by: Oliver Matthews <oliver@codersoffortune.net>
---

diff --git a/src/lxc/tools/lxc_attach.c b/src/lxc/tools/lxc_attach.c
index 9d7138835..23d63a22b 100644
--- a/src/lxc/tools/lxc_attach.c
+++ b/src/lxc/tools/lxc_attach.c
@@ -321,7 +321,7 @@ static int get_pty_on_host(struct lxc_container *c, struct wrapargs *wrap, int *
 err3:
 	lxc_mainloop_close(&descr);
 err2:
-	if (ts->sigfd != -1)
+	if (ts && ts->sigfd != -1)
 		lxc_console_sigwinch_fini(ts);
 err1:
 	lxc_console_delete(&conf->console);