From 9da17f5978a2859f3f05b600f3f64018a28d5e0b Mon Sep 17 00:00:00 2001
From: Leah Neukirchen <leah@vuxu.org>
Date: Thu, 29 Jun 2017 22:18:46 +0200
Subject: mthread: fix infinite recursion

This fixes:

References: <5> <4> <6>
Message-ID: <3>

References: <6>
Message-ID: <5>

References: <3> <2>
Message-ID: <1>
---
 mthread.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'mthread.c')

diff --git a/mthread.c b/mthread.c
index 064cbdc..b54b714 100644
--- a/mthread.c
+++ b/mthread.c
@@ -187,6 +187,10 @@ out:
 	if (parent && parent != c) {
 		struct container *r;
 
+		// check we don't introduce a new loop
+		if (reachable(parent, c) || reachable(c, parent))
+			goto out2;
+
 		if (c->parent == parent) { // already correct
 			goto out2;
 		} else if (c->parent) {
-- 
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