From 20e9adf4897941b314efe60d6f78775e6388fd49 Mon Sep 17 00:00:00 2001
From: Sylvain Petreolle <spetreolle@yahoo.fr>
Date: Sun, 17 Jan 2010 21:40:39 +0000
Subject: [PATCH] Add parameters check to ReadEventLog. Fixes last
 advapi32:eventlog crash

svn path=/trunk/; revision=45125
---
 reactos/dll/win32/advapi32/service/eventlog.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/reactos/dll/win32/advapi32/service/eventlog.c b/reactos/dll/win32/advapi32/service/eventlog.c
index 7a4acb5cc07..23b138b5f13 100644
--- a/reactos/dll/win32/advapi32/service/eventlog.c
+++ b/reactos/dll/win32/advapi32/service/eventlog.c
@@ -673,6 +673,12 @@ ReadEventLogA(IN HANDLE hEventLog,
         hEventLog, dwReadFlags, dwRecordOffset, lpBuffer,
         nNumberOfBytesToRead, pnBytesRead, pnMinNumberOfBytesNeeded);
 
+    if(!pnBytesRead || !pnMinNumberOfBytesNeeded)
+    {
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return FALSE;
+    }
+
     /* If buffer is NULL set nNumberOfBytesToRead to 0 to prevent rpcrt4 from
        trying to access a null pointer */
     if (!lpBuffer)
@@ -737,6 +743,12 @@ ReadEventLogW(IN HANDLE hEventLog,
         hEventLog, dwReadFlags, dwRecordOffset, lpBuffer,
         nNumberOfBytesToRead, pnBytesRead, pnMinNumberOfBytesNeeded);
 
+    if(!pnBytesRead || !pnMinNumberOfBytesNeeded)
+    {
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return FALSE;
+    }
+
     /* If buffer is NULL set nNumberOfBytesToRead to 0 to prevent rpcrt4 from
        trying to access a null pointer */
     if (!lpBuffer)