From 43c3c21ed15b52b43d69972985e8cc7f8240c1f5 Mon Sep 17 00:00:00 2001
From: Peter van Dijk <peter.van.dijk@powerdns.com>
Date: Sat, 8 Sep 2018 18:31:58 +0200
Subject: [PATCH] realign ucontext stack after #6719

---
 pdns/mtasker_ucontext.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pdns/mtasker_ucontext.cc b/pdns/mtasker_ucontext.cc
index d7663e340b..2cecc97f4a 100644
--- a/pdns/mtasker_ucontext.cc
+++ b/pdns/mtasker_ucontext.cc
@@ -134,7 +134,7 @@ pdns_makecontext
     }
     mcp->uc_link = next;
     mcp->uc_stack.ss_sp = ctx.uc_stack.data();
-    mcp->uc_stack.ss_size = ctx.uc_stack.size();
+    mcp->uc_stack.ss_size = ctx.uc_stack.size()-1;
     mcp->uc_stack.ss_flags = 0;
 
     auto ctxarg = splitPointer (&ctx);
-- 
2.47.2