From 7fe098ae34b54d41ec9273c7ae51ee8e708c8193 Mon Sep 17 00:00:00 2001
From: Kou Wenqi <[email protected]>
Date: Mon, 20 Jun 2022 17:31:32 +0800
Subject: [PATCH] fix a potential infinite loop

---
 src/dbinc/shqueue.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/dbinc/shqueue.h b/src/dbinc/shqueue.h
index 5fdbf47..8f185b5 100644
--- a/src/dbinc/shqueue.h
+++ b/src/dbinc/shqueue.h
@@ -261,8 +261,8 @@ struct {								\
 #define	SH_TAILQ_NEXTP(elm, field, type)				\
 	((struct type *)((u_int8_t *)(elm) + (elm)->field.stqe_next))
 
-#define	SH_TAILQ_NEXT(elm, field, type)					\
-	((elm)->field.stqe_next == -1 ? NULL :				\
+#define	SH_TAILQ_NEXT(elm, field, type)													\
+	(((elm)->field.stqe_next == -1 || (elm)->field.stqe_next == 0) ? NULL :				\
 	((struct type *)((u_int8_t *)(elm) + (elm)->field.stqe_next)))
 
   /*
-- 
2.23.0