From: xie xingguo <xie.xingguo@zte.com.cn>
Date: Sat, 23 Jul 2016 03:11:10 +0000 (+0800)
Subject: os/bluestore: check against underflow when adjust buffer size
X-Git-Tag: ses5-milestone5~155^2~3
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=55f0a56d11b9a07f49e226999b825ce895a01917;p=ceph.git

os/bluestore: check against underflow when adjust buffer size

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
---

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index d358571f9716..1dc4f690320a 100644
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -739,7 +739,9 @@ void BlueStore::TwoQCache::trim(uint64_t onode_max, uint64_t buffer_max)
       Buffer *b = &*p;
       assert(b->is_clean());
       dout(20) << __func__ << " buffer_warm_in -> out " << *b << dendl;
+      assert(buffer_bytes >= b->length);
       buffer_bytes -= b->length;
+      assert(buffer_list_bytes[BUFFER_WARM_IN] >= b->length);
       buffer_list_bytes[BUFFER_WARM_IN] -= b->length;
       to_evict_bytes -= b->length;
       evicted += b->length;