From 86944f0ea1608b8a71a9d7ed95475405b05e3f45 Mon Sep 17 00:00:00 2001
From: xie xingguo <xie.xingguo@zte.com.cn>
Date: Thu, 23 Jun 2016 20:09:01 +0800
Subject: [PATCH] os/bluestore: add sanity check for underflow

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
---
 src/os/bluestore/BlueStore.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/os/bluestore/BlueStore.h b/src/os/bluestore/BlueStore.h
index 2df1044764630..1ac611b0f7399 100644
--- a/src/os/bluestore/BlueStore.h
+++ b/src/os/bluestore/BlueStore.h
@@ -659,6 +659,7 @@ public:
 
     void _rm_buffer(Buffer *b) override {
       if (!b->is_empty()) {
+        assert(buffer_bytes >= b->length);
 	buffer_bytes -= b->length;
       }
       switch (b->cache_private) {
-- 
2.39.5