From 7211fd7ce71de2347f3a00f1229ee1ac74b006e9 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@gmx.de>
Date: Wed, 30 Oct 2013 21:24:44 +0100
Subject: [PATCH] fix devshr related panic caused by Mount.to being nil (thanks
 mischief!)

the shr mount is linked into the Mhead with m->to initially nil. only
after the the server has been attached is m->to set. just check for
it in createdir().
---
 sys/src/9/port/chan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/src/9/port/chan.c b/sys/src/9/port/chan.c
index a8bd9522a..c74fb5d51 100644
--- a/sys/src/9/port/chan.c
+++ b/sys/src/9/port/chan.c
@@ -1171,7 +1171,7 @@ createdir(Chan *c, Mhead *m)
 		nexterror();
 	}
 	for(f = m->mount; f; f = f->next){
-		if(f->mflag&MCREATE){
+		if(f->to != nil && (f->mflag&MCREATE) != 0){
 			nc = cclone(f->to);
 			runlock(&m->lock);
 			poperror();