[hbelusca] 74516: [USETUP]: Fix the primary/extended partitions creation checks introduced in r63392 : indeed this is if there are *already* 4 (primary) partitions in the table that we cannot creat...

Author: hbelusca
Date: Tue May  9 22:09:06 2017
New Revision: 74516

URL: http://svn.reactos.org/svn/reactos?rev=74516&view=rev
Log:
[USETUP]: Fix the primary/extended partitions creation checks introduced in r63392 :
indeed this is if there are *already* 4 (primary) partitions in the table that we cannot
create new primary/extended partitions.
Otherwise with the old (broken) checks, we allowed creating more than 4 partitions, and
then we overflowed over memory and corrupted the partition list structures.

Modified:
    trunk/reactos/base/setup/usetup/partlist.c

Modified: trunk/reactos/base/setup/usetup/partlist.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/setup/usetup/partlist…
==============================================================================
--- trunk/reactos/base/setup/usetup/partlist.c	[iso-8859-1] (original)
+++ trunk/reactos/base/setup/usetup/partlist.c	[iso-8859-1] Tue May  9 22:09:06 2017
@@ -3550,8 +3550,8 @@
     if (PartEntry->IsPartitioned == TRUE)
         return ERROR_NEW_PARTITION;
 
-    /* Fail if there are more than 4 partitions in the list */
-    if (GetPrimaryPartitionCount(DiskEntry) > 4)
+    /* Fail if there are already 4 primary partitions in the list */
+    if (GetPrimaryPartitionCount(DiskEntry) >= 4)
         return ERROR_PARTITION_TABLE_FULL;
 
     return ERROR_SUCCESS;
@@ -3572,8 +3572,8 @@
     if (PartEntry->IsPartitioned == TRUE)
         return ERROR_NEW_PARTITION;
 
-    /* Fail if there are more than 4 partitions in the list */
-    if (GetPrimaryPartitionCount(DiskEntry) > 4)
+    /* Fail if there are already 4 primary partitions in the list */
+    if (GetPrimaryPartitionCount(DiskEntry) >= 4)
         return ERROR_PARTITION_TABLE_FULL;
 
     /* Fail if there is another extended partition in the list */