[ekohl] 74157: [NTOS:OB] - Allocate all of the kernel objects security descriptor and the dos devices security descriptor from the paged pool, instead of just the ACLs. - Replace special security d...
13 Mar
2017
13 Mar
'17
12:10 a.m.
Author: ekohl
Date: Mon Mar 13 00:10:23 2017
New Revision: 74157
URL: http://svn.reactos.org/svn/reactos?rev=74157&view=rev
Log:
[NTOS:OB]
- Allocate all of the kernel objects security descriptor and the dos devices security
descriptor from the paged pool, instead of just the ACLs.
- Replace special security descriptor free routines by calls to ExFreePoolWithTag.
- Replace the TAG_OB_DIR_SD by TAG_SD.
Modified:
trunk/reactos/ntoskrnl/include/internal/tag.h
trunk/reactos/ntoskrnl/ob/obinit.c
trunk/reactos/ntoskrnl/ob/obname.c
Modified: trunk/reactos/ntoskrnl/include/internal/tag.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/…
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/tag.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/tag.h [iso-8859-1] Mon Mar 13 00:10:23 2017
@@ -150,7 +150,6 @@
/* Object Manager Tags */
#define OB_NAME_TAG 'mNbO'
#define OB_DIR_TAG 'iDbO'
-#define TAG_OB_DIR_SD 'sDbO'
/* formerly located in ps/cid.c */
Modified: trunk/reactos/ntoskrnl/ob/obinit.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ob/obinit.c?rev=7…
==============================================================================
--- trunk/reactos/ntoskrnl/ob/obinit.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ob/obinit.c [iso-8859-1] Mon Mar 13 00:10:23 2017
@@ -58,32 +58,37 @@
NTSTATUS
NTAPI
INIT_FUNCTION
-ObpCreateKernelObjectsSD(OUT PSECURITY_DESCRIPTOR SecurityDescriptor)
-{
- ULONG AclLength;
+ObpCreateKernelObjectsSD(OUT PSECURITY_DESCRIPTOR *SecurityDescriptor)
+{
+ PSECURITY_DESCRIPTOR Sd = NULL;
PACL Dacl;
+ ULONG AclSize, SdSize;
NTSTATUS Status;
- /* Initialize the SD */
- Status = RtlCreateSecurityDescriptor(SecurityDescriptor,
- SECURITY_DESCRIPTOR_REVISION);
- if (!NT_SUCCESS(Status))
- return Status;
-
- /* Allocate the DACL */
- AclLength = sizeof(ACL) +
- sizeof(ACE) + RtlLengthSid(SeWorldSid) +
- sizeof(ACE) + RtlLengthSid(SeAliasAdminsSid) +
- sizeof(ACE) + RtlLengthSid(SeLocalSystemSid);
-
- Dacl = ExAllocatePoolWithTag(PagedPool, AclLength, TAG_OB_DIR_SD);
- if (Dacl == NULL)
+ AclSize = sizeof(ACL) +
+ sizeof(ACE) + RtlLengthSid(SeWorldSid) +
+ sizeof(ACE) + RtlLengthSid(SeAliasAdminsSid) +
+ sizeof(ACE) + RtlLengthSid(SeLocalSystemSid);
+
+ SdSize = sizeof(SECURITY_DESCRIPTOR) + AclSize;
+
+ /* Allocate the SD and ACL */
+ Sd = ExAllocatePoolWithTag(PagedPool, SdSize, TAG_SD);
+ if (Sd == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
+ /* Initialize the SD */
+ Status = RtlCreateSecurityDescriptor(Sd,
+ SECURITY_DESCRIPTOR_REVISION);
+ if (!NT_SUCCESS(Status))
+ goto done;
+
+ Dacl = (PACL)((INT_PTR)Sd + sizeof(SECURITY_DESCRIPTOR));
+
/* Initialize the DACL */
- RtlCreateAcl(Dacl, AclLength, ACL_REVISION);
+ RtlCreateAcl(Dacl, AclSize, ACL_REVISION);
/* Add the ACEs */
RtlAddAccessAllowedAce(Dacl,
@@ -102,32 +107,23 @@
SeLocalSystemSid);
/* Attach the DACL to the SD */
- Status = RtlSetDaclSecurityDescriptor(SecurityDescriptor,
+ Status = RtlSetDaclSecurityDescriptor(Sd,
TRUE,
Dacl,
FALSE);
+ if (!NT_SUCCESS(Status))
+ goto done;
+
+ *SecurityDescriptor = Sd;
+
+done:
+ if (!NT_SUCCESS(Status))
+ {
+ if (Sd != NULL)
+ ExFreePoolWithTag(Sd, TAG_SD);
+ }
return Status;
-}
-
-static
-VOID
-NTAPI
-INIT_FUNCTION
-ObpFreeKernelObjectsSD(IN OUT PSECURITY_DESCRIPTOR SecurityDescriptor)
-{
- PACL Dacl = NULL;
- BOOLEAN DaclPresent, Defaulted;
- NTSTATUS Status;
-
- Status = RtlGetDaclSecurityDescriptor(SecurityDescriptor,
- &DaclPresent,
- &Dacl,
- &Defaulted);
- if (NT_SUCCESS(Status) && Dacl != NULL)
- {
- ExFreePoolWithTag(Dacl, TAG_OB_DIR_SD);
- }
}
BOOLEAN
@@ -212,7 +208,7 @@
POBJECT_HEADER Header;
POBJECT_HEADER_CREATOR_INFO CreatorInfo;
POBJECT_HEADER_NAME_INFO NameInfo;
- SECURITY_DESCRIPTOR KernelObjectsSD;
+ PSECURITY_DESCRIPTOR KernelObjectsSD = NULL;
NTSTATUS Status;
/* Check if this is actually Phase 1 initialization */
@@ -346,13 +342,13 @@
&Name,
OBJ_CASE_INSENSITIVE | OBJ_PERMANENT,
NULL,
- &KernelObjectsSD);
+ KernelObjectsSD);
/* Create the directory */
Status = NtCreateDirectoryObject(&Handle,
DIRECTORY_ALL_ACCESS,
&ObjectAttributes);
- ObpFreeKernelObjectsSD(&KernelObjectsSD);
+ ExFreePoolWithTag(KernelObjectsSD, TAG_SD);
if (!NT_SUCCESS(Status)) return FALSE;
/* Close the extra handle */
Modified: trunk/reactos/ntoskrnl/ob/obname.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ob/obname.c?rev=7…
==============================================================================
--- trunk/reactos/ntoskrnl/ob/obname.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ob/obname.c [iso-8859-1] Mon Mar 13 00:10:23 2017
@@ -34,35 +34,40 @@
NTSTATUS
NTAPI
INIT_FUNCTION
-ObpCreateGlobalDosDevicesSD(OUT PSECURITY_DESCRIPTOR SecurityDescriptor)
+ObpCreateGlobalDosDevicesSD(OUT PSECURITY_DESCRIPTOR *SecurityDescriptor)
{
- ULONG AclLength;
+ PSECURITY_DESCRIPTOR Sd = NULL;
PACL Dacl;
+ ULONG AclSize, SdSize;
NTSTATUS Status;
+ AclSize = sizeof(ACL) +
+ sizeof(ACE) + RtlLengthSid(SeWorldSid) +
+ sizeof(ACE) + RtlLengthSid(SeLocalSystemSid) +
+ sizeof(ACE) + RtlLengthSid(SeWorldSid) +
+ sizeof(ACE) + RtlLengthSid(SeAliasAdminsSid) +
+ sizeof(ACE) + RtlLengthSid(SeLocalSystemSid) +
+ sizeof(ACE) + RtlLengthSid(SeCreatorOwnerSid);
+
+ SdSize = sizeof(SECURITY_DESCRIPTOR) + AclSize;
+
+ /* Allocate the SD and ACL */
+ Sd = ExAllocatePoolWithTag(PagedPool, SdSize, TAG_SD);
+ if (Sd == NULL)
+ {
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
/* Initialize the SD */
- Status = RtlCreateSecurityDescriptor(SecurityDescriptor,
+ Status = RtlCreateSecurityDescriptor(Sd,
SECURITY_DESCRIPTOR_REVISION);
if (!NT_SUCCESS(Status))
return Status;
- /* Allocate the DACL */
- AclLength = sizeof(ACL) +
- sizeof(ACE) + RtlLengthSid(SeWorldSid) +
- sizeof(ACE) + RtlLengthSid(SeLocalSystemSid) +
- sizeof(ACE) + RtlLengthSid(SeWorldSid) +
- sizeof(ACE) + RtlLengthSid(SeAliasAdminsSid) +
- sizeof(ACE) + RtlLengthSid(SeLocalSystemSid) +
- sizeof(ACE) + RtlLengthSid(SeCreatorOwnerSid);
-
- Dacl = ExAllocatePoolWithTag(PagedPool, AclLength, TAG_OB_DIR_SD);
- if (Dacl == NULL)
- {
- return STATUS_INSUFFICIENT_RESOURCES;
- }
+ Dacl = (PACL)((INT_PTR)Sd + sizeof(SECURITY_DESCRIPTOR));
/* Initialize the DACL */
- RtlCreateAcl(Dacl, AclLength, ACL_REVISION);
+ RtlCreateAcl(Dacl, AclSize, ACL_REVISION);
/* Add the ACEs */
RtlAddAccessAllowedAce(Dacl,
@@ -100,31 +105,23 @@
SeCreatorOwnerSid);
/* Attach the DACL to the SD */
- Status = RtlSetDaclSecurityDescriptor(SecurityDescriptor,
+ Status = RtlSetDaclSecurityDescriptor(Sd,
TRUE,
Dacl,
FALSE);
+ if (!NT_SUCCESS(Status))
+ goto done;
+
+ *SecurityDescriptor = Sd;
+
+done:
+ if (!NT_SUCCESS(Status))
+ {
+ if (Sd != NULL)
+ ExFreePoolWithTag(Sd, TAG_SD);
+ }
return Status;
-}
-
-VOID
-NTAPI
-INIT_FUNCTION
-ObpFreeGlobalDosDevicesSD(IN OUT PSECURITY_DESCRIPTOR SecurityDescriptor)
-{
- PACL Dacl = NULL;
- BOOLEAN DaclPresent, Defaulted;
- NTSTATUS Status;
-
- Status = RtlGetDaclSecurityDescriptor(SecurityDescriptor,
- &DaclPresent,
- &Dacl,
- &Defaulted);
- if (NT_SUCCESS(Status) && Dacl != NULL)
- {
- ExFreePoolWithTag(Dacl, TAG_OB_DIR_SD);
- }
}
NTSTATUS
@@ -135,7 +132,7 @@
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING RootName, TargetName, LinkName;
HANDLE Handle, SymHandle;
- SECURITY_DESCRIPTOR DosDevicesSD;
+ PSECURITY_DESCRIPTOR DosDevicesSD = NULL;
NTSTATUS Status;
/* Create a custom security descriptor for the global DosDevices directory */
@@ -149,11 +146,11 @@
&RootName,
OBJ_PERMANENT,
NULL,
- &DosDevicesSD);
+ DosDevicesSD);
Status = NtCreateDirectoryObject(&Handle,
DIRECTORY_ALL_ACCESS,
&ObjectAttributes);
- ObpFreeGlobalDosDevicesSD(&DosDevicesSD);
+ ExFreePoolWithTag(DosDevicesSD, TAG_SD);
if (!NT_SUCCESS(Status)) return Status;
/*********************************************\
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