From 799f68e918fd3fb8a373338c7886042317e1910c Mon Sep 17 00:00:00 2001
From: Dag Haavi Finstad <daghf@varnish-software.com>
Date: Mon, 28 Oct 2019 12:13:43 +0100
Subject: [PATCH 1/1] h2_rx_data: Remember to drop the lock before returning

Fixes: #3086
---
 bin/varnishd/http2/cache_http2_proto.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/bin/varnishd/http2/cache_http2_proto.c b/bin/varnishd/http2/cache_http2_proto.c
index 902c1e08c..0f2a21230 100644
--- a/bin/varnishd/http2/cache_http2_proto.c
+++ b/bin/varnishd/http2/cache_http2_proto.c
@@ -703,8 +703,10 @@ h2_rx_data(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
 	Lck_Lock(&h2->sess->mtx);
 	while (h2->mailcall != NULL && h2->error == 0 && r2->error == 0)
 		AZ(Lck_CondWait(h2->cond, &h2->sess->mtx, 0));
-	if (h2->error || r2->error)
+	if (h2->error || r2->error) {
+		Lck_Unlock(&h2->sess->mtx);
 		return (h2->error ? h2->error : r2->error);
+	}
 	AZ(h2->mailcall);
 	h2->mailcall = r2;
 	h2->req0->r_window -= h2->rxf_len;
-- 
2.27.0