From d4414b3959fd289aaffcf0e10227b5860a0bb254 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@gmx.de>
Date: Wed, 1 May 2013 18:31:13 +0200
Subject: devloopback: fix potential channel leak on allocation error (from
 eriks 9atom)

---
 sys/src/9/port/devloopback.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sys/src/9/port/devloopback.c b/sys/src/9/port/devloopback.c
index d3a64932b..cc51a1bf3 100644
--- a/sys/src/9/port/devloopback.c
+++ b/sys/src/9/port/devloopback.c
@@ -131,8 +131,12 @@ loopbackattach(char *spec)
 	}
 
 	c = devattach('X', spec);
-	lb = &loopbacks[dev];
+	if(waserror()){
+		chanfree(c);
+		nexterror();
+	}
 
+	lb = &loopbacks[dev];
 	qlock(lb);
 	if(waserror()){
 		lb->ref--;
@@ -168,6 +172,8 @@ loopbackattach(char *spec)
 	poperror();
 	qunlock(lb);
 
+	poperror();
+
 	mkqid(&c->qid, QID(0, Qtopdir), 0, QTDIR);
 	c->aux = lb;
 	c->dev = dev;
-- 
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