From 849161602978d6749194b080566fa42548874908 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Axel=20D=C3=B6rfler?= <axeld@pinc-software.de>
Date: Thu, 21 Jun 2007 12:35:39 +0000
Subject: [PATCH] Putting an unused block will now trigger a panic.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21481 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/system/kernel/cache/block_cache.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/system/kernel/cache/block_cache.cpp b/src/system/kernel/cache/block_cache.cpp
index 79141c4163..78d69cdb25 100644
--- a/src/system/kernel/cache/block_cache.cpp
+++ b/src/system/kernel/cache/block_cache.cpp
@@ -446,6 +446,11 @@ put_cached_block(block_cache *cache, cached_block *block)
 	}
 #endif
 
+	if (block->ref_count < 1) {
+		panic("Invalid ref_count for block %p, cache %p\n", block, cache);
+		return;
+	}
+
 	if (--block->ref_count == 0
 		&& block->transaction == NULL
 		&& block->previous_transaction == NULL) {