From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Thu, 4 Jun 2015 17:27:40 +0000 (+0100)
Subject: Fix calculation of pool free space.
X-Git-Tag: 1.0.0~574
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0b9bfe49099f2b50034f26f4c043657efe25fcb8;p=thirdparty%2Frspamd.git

Fix calculation of pool free space.
---

diff --git a/src/libutil/mem_pool.c b/src/libutil/mem_pool.c
index 3d439ed01d..7927fdacea 100644
--- a/src/libutil/mem_pool.c
+++ b/src/libutil/mem_pool.c
@@ -60,12 +60,16 @@ static gboolean always_malloc = FALSE;
 static gsize
 pool_chain_free (struct _pool_chain *chain)
 {
-	return chain->len - (gsize)(chain->pos - chain->begin + MEM_ALIGNMENT);
+	gint64 occupied = chain->pos - chain->begin + MEM_ALIGNMENT;
+
+	return occupied < (gint64)chain->len ? chain->len - occupied : 0;
 }
 static gsize
 pool_chain_free_shared (struct _pool_chain_shared *chain)
 {
-	return chain->len - (gsize)(chain->pos - chain->begin + MEM_ALIGNMENT);
+	gint64 occupied = chain->pos - chain->begin + MEM_ALIGNMENT;
+
+	return occupied < (gint64)chain->len ? chain->len - occupied : 0;
 }
 
 static struct _pool_chain *