KD64: Raise to HIGH_LEVEL when entering trap
KDBG: lower to DISPATCH_LEVEL when applying IRQL hack & use a worker thread to load symbols
KD&KDBG: Actually unload symbols when required
Raise IRQL before entering debugger, so that KeAcquireSpinLockAtDpcLevel works as expected.
- HIGH_LEVEL since we don't know where we are coming from.
Do not try to read debug symbol from files in KDBG.
- There is no reason that this works if Mm didn't map it in the first place.
GCC has some functions, variables & type attributes which can be used as aliases
for some of the SAL annotations. Although it's not as rich & precise, it's still useful
since we actually enable -Werror on GCC builds whereas we don't use such an option
on MSVC builds.
For now, _Must_inspect_result_ is aliased to warn_result_unused attribute.
ProcessUserModeIOPL, ProcessWow64Information and ThreadZeroTlsCell classes fail on AMD64 build because of wrong IQS values assigned to them. Also explicitly tell the compiler that ProcessUserModeIOPL is strictly for x86 as user mode I/O privilege level is 32-bit stuff.
In addition to that, implement IQS_NO_TYPE_LENGTH macro which it'll be used for classes such as ProcessUserModeIOPL where type length is not required and that it should be 0. With that said, we indirectly fix a size length mismatch issue with ProcessUserModeIOPL on 32-bit of ReactOS as well.
- Remove a redundant call of ObReferenceObjectByHandle. Not only it didn't make much sense (we reference the object from thread handle and the new thread object referencing the same handle!), specifying a request access of THREAD_ALL_ACCESS for the thread object is kind of suspicious and all of these access rights are unwanted.
- Add some failure checks involving the CopyOnOpen code paths
- Add some DPRINT1 debug prints (concerning the CopyOnOpen code paths as usual)
driverName.Buffer leaked when the "(!NT_SUCCESS(status) || ServiceName != NULL)"
case is taken because ServiceName != NULL, and some of the functions fail.
- Fix CID 1477246: Uninitialized pointer read (UNINIT) (happens in
the last ExFreePoolWithTag(basicInfo, TAG_IO) call when the
"(!NT_SUCCESS(status) || ServiceName != NULL)" case is not taken).
- Centralize all the ExFreePoolWithTag(basicInfo, TAG_IO) cleanups
at the end of the function.
- Both cases "(driverName.Buffer == NULL)" and "(ServiceName != NULL)"
can only be taken when basicInfo != NULL, so assert on this fact.
- Fix/add comments;
- Reduce indentation level;
- Direct copy for registry integer values;
- Use for-loops for linked lists;
- Use ULONG when the API uses it (sizes for Ob, or REG_DWORD data in registry).
When freeing pages, free page entries with pages num == 3 were
incorrectly treated as entries with pages num >= 4 and thus
their re-insertion was not triggered. That lead to non paged pool
fragmentation (can be triggered by kmtest:ExPools, for example)
Also, altered the index acquisition code for MmNonPagedPoolFreeList
entries so it looks more clear
- Manage the lifetime of the temporary 'PartitionBuffer' buffer where
it is locally used only, and free it as soon as possible, just after
calculating the sector checksum. No need to then free it outside of
the main for-loop.
- When the 'DriveLayout' buffer is freed, ensure the pointer is NULL-ed
(and assert this at the top of the main for-loop), since it can also
be freed at cleanup outside this for-loop, and in this case a NULL
check is performed.
This will avoid the scenario of possibly double-freeing a pointer,
in the case the 'DriveLayout' was previously freed (when e.g. reading
the sector for checksum calculation failed), then the for-loop goes to
the next disk and stops early.
The purpose of 'SingleDisk' is the same as in the IopCreateArcNames()
function. It is an optimization for that when looking up the
firmware-recognized ARC disks list, in order to match one of these with
the current NT disk being analysed (see e.g. also in IopCreateArcNamesDisk()),
we avoid a possible IopVerifyDiskSignature() call and directly build a
corresponding ARC name NT symbolic link for it.
'SingleDisk' will actually be TRUE, whether the DiskSignatureListHead
list is empty or contains only one element: Indeed in only both these
cases, 'DiskSignatureListHead.Flink->Flink' will refer to the list head.
(If the list is empty but 'SingleDisk' is TRUE, this does not matter,
because the DiskSignatureListHead looking-up loop never starts.)
In addition to that, here are some stuff done in this commit whilst testing:
- ICIF_QUERY_SIZE_VARIABLE and friends were badly misused, they should be used only when an information class whose information length size is dyanmic and not fixed. By removing such flags from erroneous classes, this fixes the STATUS_INFO_LENGTH_MISMATCH testcases.
- Use CHAR instead of UCHAR for classes that do not need alignment probing, as every other class in the table do, for the sake of consistency.
- ProcessEnableAlignmentFaultFixup uses BOOLEAN as type size, not CHAR. This fixes a testcase failure on ROS.
- Check for information length size before proceeding further on querying the process' cookie information.
- ProcessHandleTracing wants an alignment of a ULONG, not CHAR.
- Move PROCESS_LDT_INFORMATION and PROCESS_LDT_SIZE outside of NTOS_MODE_USER macro case. This fixes a compilation issue when enabling the alignment probing. My mistake of having them inside NTOS_MODE_USER case, sorry.
- On functions like NtQueryInformationThread and the Process equivalent, complete probing is not done at the beginning of the function, complete probing including if the buffer is writable alongside with datatype misalignment check that is. Instead such check is done on each information class case basis. With that said, we have to explicitly tell DefaultQueryInfoBufferCheck if we want a complete probing or not initially.
KiSetTrapContext is an asm wrapper around RtlSetUnwindContext, which first stores an exception frame to assure that all non-volatile registers were put on the stack, then calls RtlSetUnwindContext to update their first saving positions on the stack and finally restore the exception frame to potentially load any updated registers, that haven't been saved elsewhere on the stack.
A few of these classes have fixed size lengths, the rest are arbitrary. Also the TokenAuditPolicy class hasn't a size length type specified in the table, which is wrong (and move the corresponding TOKEN_AUDIT_POLICY_INFORMATION structure into the private header).
PsImpersonateClient blindly impersonates the requested client even though it doesn't know if the actual token given to the call can be impersonated for the thread of the client which we are going to begin impersonation. In the case where impersonation is not possible, make a copy of the given token and assign the newly one for impersonation instead.
CORE-17539
Implement SepImpersonateAnonymousToken private helpers, which is necessary for the complete implementation of NtImpersonateAnonymousToken function and thus finally we're able to impersonate the anonymous logon token.
As of now the Object Manager private service, ObpCloseHandleTableEntry, looks for OBJ_PROTECT_CLOSE attribute if a handle should not be closed. However, in ObDuplicateObject if an attribute of OBJ_PROTECT_CLOSE is found as it's been filled to the caller (see L2466) this attribute is removed from the attributes list of the new handle and ObpAccessProtectCloseBit access is granted to the newly duplicated object handle.
With that being said ObpCloseHandleTableEntry indiscriminately closes the object handle albeit it shouldn't do so. As a matter of fact in Windows Server 2003 SP2 this service indeed checks for ObpAccessProtectCloseBit flag bit and if the condition is met then it returns STATUS_HANDLE_NOT_CLOSABLE as it should. Therefore we should do the same.
Now NtClose can properly warn the calling thread the object handle can't be closed which fixes a testcase failure within NtDuplicateObject NTDLL APITEST where this function gives handle close protection bit as requested by the caller.
* Guard the token in a lock whilst querying stuff
* Remove the piece of code that checks if the information class provided is above the maximum information class threshold. That code literally duplicates the inner functionality of the default case in the switch block, where the code falls in that case if an invalid information class is provided anyway.
* Remove the redundant information classes. Internally, this function in Windows has 12 switch case blocks (11 token info classes + the default case) and the other classes are supported in NtQueryInformationToken only so it doesn't make any logical sense to keep them in the codebase.
* Annotate the argument parameters with SAL and add documentation header
Properly handle PDE refcounting
Clean-up of the internal API
Enforce attaching to the process when modifying its memory layout, instead of
making circonvoluted mappings which always end up being broken.
- Do not lock the section segment when we are serving a fault for a process private page.
- Do not keep the process address space lock while writing to pagefile.
- Do not wait for an event that might never be set.
Mute debug prints of MmDoesFileHaveUserWritableReferences and SeAuditingFileEventsWithContext stubs.
These stubs are very noisy and create a lot of spam in the log when using Microsoft NTFS driver in ReactOS (with some other improvements applied).
Implementing those functions isn't badly required for the proper work of this driver, so better way for now is just mute these stubs a bit.
After my changes, they will be displayed only once, and the log will be more clear, so it will seem to be enough to understand that the driver calls these routines.
CORE-17409
This function is used during the Security kernel module phase initialisation to set up the system process token which the phase initialisation procedure in itself is stored in the INIT section. With that being said, do the same for SepCreateSystemProcessToken too and add a header documentation as an addition.
These private functions are needed to set up two different kinds of system's anonymous logon tokens: one that includes everyone in the group and the other that doesn't. These functions are needed as next step closer to the
implementation of NtImpersonateAnonymousToken system call.
for manually reported devices, as it is required by the newdev.dll
for installing drivers from INF files
CORE-17212 CORE-17398
Co-authored-by: Stanislav Motylkov <x86corez@gmail.com>
Shrink when using 1/8 of its allocated capacity (thus use 25% of it at the end of the process)
Expand when using 3/4 of its allocated capacity (thus use ~40% of it at the end of the process)
This control class is triggered when a driver is being installed for a
non-critical device. The driver info should already be in the registry
so we just need to push the device through the state graph
Meanwhile, combine the code for similar control classes into
PiControlSyncDeviceAction routine
CORE-17463 CORE-17490
* Implement SepCompareSidAndAttributesFromTokens and SepComparePrivilegeAndAttributesFromTokens functions for array elements comparison
* Implement the token comparison code in SepCompareTokens function
* Add a missing PAGED_CODE() in SepCompareTokens as most of the token comparison code is paged
* Use SAL annotations for SepCompareTokens and NtCompareTokens
Prior to acquiring a quota from the process and do whatever it's needed to do (charge it or return it back), we must guard ourselves with a spinlock so that we may not get into potential race conditions. In Windows Server 2003, PspGivebackQuota and PspExpandQuota do the same thing and they're the equivalent to PspReturnProcessQuotaSpecifiedPool and PspChargeProcessQuotaSpecifiedPool in our codebase.
Phase 2 and 3 were not done anymore since 777a2d94da.
Fix that, by merging phases 1 and 2, and by calling phase 3 later
for log file debugging, when ExpInitializationPhase = 3
CORE-17470
In Windows Server 2003 the lock is initialised on a per-token basis, that is, the lock resource is created in SepDuplicateToken() and SepCreateToken() functions. This ensures that the lock initialisation is done locally for the specific token thus avoiding the need of a global lock.
Do not ditch the pages as soon as the section are unmapped
Improve MmBalancer "algorithm" (or whatever you call that)
Various needed fixes to get this going.
