lxccontainer.c: check lxc_conf before referance haltsignal

If we start container with rcfile(see comments in lxc_start.c), it is possible that we have no config file in /usr/local/var/lib/lxc. So when we try lxc_stop, lxc_container_new will not load any config so we'll get c->lxc_conf = NULL. In that case, we'll get Segmentation fault in lxcapi_shutdown, a simple check would fix this. Signed-off-by: Qiang Huang <h.huangqiang@huawei.com> Acked-by: Stéphane Graber <stgraber@ubuntu.com>

lxccontainer.c: check lxc_conf before referance haltsignal
b0227444 · Qiang Huang · Stéphane Graber · 3139aead · b0227444
Commit b0227444 authored Jan 15, 2014 by Qiang Huang Committed by Stéphane Graber Jan 14, 2014
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lxccontainer.c src/lxc/lxccontainer.c +1 -1

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--- a/src/lxc/lxccontainer.c
+++ b/src/lxc/lxccontainer.c
@@ -1313,7 +1313,7 @@ static bool lxcapi_shutdown(struct lxc_container *c, int timeout)
 	pid = c->init_pid(c);
 	if (pid <= 0)
 		return true;
-	if (c->lxc_conf->haltsignal)
+	if (c->lxc_conf && c->lxc_conf->haltsignal)
 		haltsignal = c->lxc_conf->haltsignal;
 	kill(pid, haltsignal);
 	retv = c->wait(c, "STOPPED", timeout);