From: Cristy <urban-warrior@imagemagick.org>
Date: Fri, 24 Nov 2017 14:39:22 +0000 (-0500)
Subject: Assert if resources go negative
X-Git-Tag: 7.0.7-12~25
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=898a04632f46f0a421f7d8ef7f98bcf9cb2fa926;p=imagemagick

Assert if resources go negative
---

diff --git a/MagickCore/resource.c b/MagickCore/resource.c
index 1dc2c0b1b..28980000e 100644
--- a/MagickCore/resource.c
+++ b/MagickCore/resource.c
@@ -214,6 +214,7 @@ MagickExport MagickBooleanType AcquireMagickResource(const ResourceType type,
         status=MagickTrue;
       else
         resource_info.memory-=(MagickOffsetType) size;
+      assert(resource_info.memory >= 0);
       if (logging != MagickFalse)
         {
           (void) FormatMagickSize(size,MagickTrue,"B",MagickFormatExtent,
@@ -234,6 +235,7 @@ MagickExport MagickBooleanType AcquireMagickResource(const ResourceType type,
         status=MagickTrue;
       else
         resource_info.map-=(MagickOffsetType) size;
+      assert(resource_info.map >= 0);
       if (logging != MagickFalse)
         {
           (void) FormatMagickSize(size,MagickTrue,"B",MagickFormatExtent,
@@ -254,6 +256,7 @@ MagickExport MagickBooleanType AcquireMagickResource(const ResourceType type,
         status=MagickTrue;
       else
         resource_info.disk-=(MagickOffsetType) size;
+      assert(resource_info.disk >= 0);
       if (logging != MagickFalse)
         {
           (void) FormatMagickSize(size,MagickTrue,"B",MagickFormatExtent,
@@ -274,6 +277,7 @@ MagickExport MagickBooleanType AcquireMagickResource(const ResourceType type,
         status=MagickTrue;
       else
         resource_info.file-=(MagickOffsetType) size;
+      assert(resource_info.file >= 0);
       if (logging != MagickFalse)
         {
           (void) FormatMagickSize(size,MagickFalse,(const char *) NULL,
@@ -348,6 +352,7 @@ MagickExport MagickBooleanType AcquireMagickResource(const ResourceType type,
         status=MagickTrue;
       else
         resource_info.time-=(MagickOffsetType) size;
+      assert(resource_info.time >= 0);
       if (logging != MagickFalse)
         {
           (void) FormatMagickSize(size,MagickFalse,(const char *) NULL,