[reactos] 02/02: [NTOS:SE] Define a name macro for the threshold value

[George Bișoc]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=9c1c88de3e0936544e36c…

commit 9c1c88de3e0936544e36cf72c8eb3261e967b5eb
Author:     George Bișoc <george.bisoc(a)reactos.org>
AuthorDate: Sun Sep 26 11:42:00 2021 +0200
Commit:     George Bișoc <george.bisoc(a)reactos.org>
CommitDate: Mon Sep 27 09:39:23 2021 +0200

    [NTOS:SE] Define a name macro for the threshold value
    
    Instead of having this magic value as is, describe it within a macro for readability
purposes.
---
 ntoskrnl/se/sid.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/ntoskrnl/se/sid.c b/ntoskrnl/se/sid.c
index de4c6f48f39..8d9e701f245 100644
--- a/ntoskrnl/se/sid.c
+++ b/ntoskrnl/se/sid.c
@@ -13,6 +13,8 @@
 
 /* GLOBALS ********************************************************************/
 
+#define SE_MAXIMUM_GROUP_LIMIT 0x1000
+
 SID_IDENTIFIER_AUTHORITY SeNullSidAuthority = {SECURITY_NULL_SID_AUTHORITY};
 SID_IDENTIFIER_AUTHORITY SeWorldSidAuthority = {SECURITY_WORLD_SID_AUTHORITY};
 SID_IDENTIFIER_AUTHORITY SeLocalSidAuthority = {SECURITY_LOCAL_SID_AUTHORITY};
@@ -444,7 +446,8 @@ SepReleaseSid(
  * Returns STATUS_SUCCESS if SID and attributes capturing
  * has been completed successfully. STATUS_INVALID_PARAMETER
  * is returned if the count of attributes exceeds the maximum
- * threshold that the kernel can permit. STATUS_INSUFFICIENT_RESOURCES
+ * threshold that the kernel can permit, with the purpose of
+ * avoiding integer overflows. STATUS_INSUFFICIENT_RESOURCES
  * is returned if memory pool allocation for the captured SID has failed.
  * STATUS_BUFFER_TOO_SMALL is returned if the length of the allocated
  * buffer is less than the required size. A failure NTSTATUS code is
@@ -478,7 +481,7 @@ SeCaptureSidAndAttributesArray(
         return STATUS_SUCCESS;
     }
 
-    if (AttributeCount > 0x1000)
+    if (AttributeCount > SE_MAXIMUM_GROUP_LIMIT)
     {
         return STATUS_INVALID_PARAMETER;
     }