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[NTOS:MM] Fix typo in MiCheckForUserStackOverflow

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This commit is contained in:
Andrew Boyarshin 2018-12-12 18:12:24 +07:00 committed by Pierre Schweitzer
parent 472787ffea
commit 3ba51dc218
1 changed files with 10 additions and 10 deletions
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20
ntoskrnl/mm/ARM3/pagfault.c
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@ -33,7 +33,7 @@ MiCheckForUserStackOverflow(IN PVOID Address,
PETHREAD CurrentThread = PsGetCurrentThread(); PETHREAD CurrentThread = PsGetCurrentThread();
PTEB Teb = CurrentThread->Tcb.Teb; PTEB Teb = CurrentThread->Tcb.Teb;
PVOID StackBase, DeallocationStack, NextStackAddress; PVOID StackBase, DeallocationStack, NextStackAddress;
SIZE_T GuranteedSize; SIZE_T GuaranteedSize;
NTSTATUS Status; NTSTATUS Status;
/* Do we own the address space lock? */ /* Do we own the address space lock? */
@ -56,15 +56,15 @@ MiCheckForUserStackOverflow(IN PVOID Address,
/* Read the current settings */ /* Read the current settings */
StackBase = Teb->NtTib.StackBase; StackBase = Teb->NtTib.StackBase;
DeallocationStack = Teb->DeallocationStack; DeallocationStack = Teb->DeallocationStack;
GuranteedSize = Teb->GuaranteedStackBytes; GuaranteedSize = Teb->GuaranteedStackBytes;
DPRINT("Handling guard page fault with Stacks Addresses 0x%p and 0x%p, guarantee: %lx\n", DPRINT("Handling guard page fault with Stacks Addresses 0x%p and 0x%p, guarantee: %lx\n",
StackBase, DeallocationStack, GuranteedSize); StackBase, DeallocationStack, GuaranteedSize);
/* Guarantees make this code harder, for now, assume there aren't any */ /* Guarantees make this code harder, for now, assume there aren't any */
ASSERT(GuranteedSize == 0); ASSERT(GuaranteedSize == 0);
/* So allocate only the minimum guard page size */ /* So allocate only the minimum guard page size */
GuranteedSize = PAGE_SIZE; GuaranteedSize = PAGE_SIZE;
/* Does this faulting stack address actually exist in the stack? */ /* Does this faulting stack address actually exist in the stack? */
if ((Address >= StackBase) || (Address < DeallocationStack)) if ((Address >= StackBase) || (Address < DeallocationStack))
@ -76,7 +76,7 @@ MiCheckForUserStackOverflow(IN PVOID Address,
} }
/* This is where the stack will start now */ /* This is where the stack will start now */
NextStackAddress = (PVOID)((ULONG_PTR)PAGE_ALIGN(Address) - GuranteedSize); NextStackAddress = (PVOID)((ULONG_PTR)PAGE_ALIGN(Address) - GuaranteedSize);
/* Do we have at least one page between here and the end of the stack? */ /* Do we have at least one page between here and the end of the stack? */
if (((ULONG_PTR)NextStackAddress - PAGE_SIZE) <= (ULONG_PTR)DeallocationStack) if (((ULONG_PTR)NextStackAddress - PAGE_SIZE) <= (ULONG_PTR)DeallocationStack)
@ -85,13 +85,13 @@ MiCheckForUserStackOverflow(IN PVOID Address,
DPRINT1("Close to our death...\n"); DPRINT1("Close to our death...\n");
/* Calculate the next memory address */ /* Calculate the next memory address */
NextStackAddress = (PVOID)((ULONG_PTR)PAGE_ALIGN(DeallocationStack) + GuranteedSize); NextStackAddress = (PVOID)((ULONG_PTR)PAGE_ALIGN(DeallocationStack) + GuaranteedSize);
/* Allocate the memory */ /* Allocate the memory */
Status = ZwAllocateVirtualMemory(NtCurrentProcess(), Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
&NextStackAddress, &NextStackAddress,
0, 0,
&GuranteedSize, &GuaranteedSize,
MEM_COMMIT, MEM_COMMIT,
PAGE_READWRITE); PAGE_READWRITE);
if (NT_SUCCESS(Status)) if (NT_SUCCESS(Status))
@ -111,13 +111,13 @@ MiCheckForUserStackOverflow(IN PVOID Address,
ASSERT((PsGetCurrentProcess()->Peb->NtGlobalFlag & FLG_DISABLE_STACK_EXTENSION) == 0); ASSERT((PsGetCurrentProcess()->Peb->NtGlobalFlag & FLG_DISABLE_STACK_EXTENSION) == 0);
/* Update the stack limit */ /* Update the stack limit */
Teb->NtTib.StackLimit = (PVOID)((ULONG_PTR)NextStackAddress + GuranteedSize); Teb->NtTib.StackLimit = (PVOID)((ULONG_PTR)NextStackAddress + GuaranteedSize);
/* Now move the guard page to the next page */ /* Now move the guard page to the next page */
Status = ZwAllocateVirtualMemory(NtCurrentProcess(), Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
&NextStackAddress, &NextStackAddress,
0, 0,
&GuranteedSize, &GuaranteedSize,
MEM_COMMIT, MEM_COMMIT,
PAGE_READWRITE | PAGE_GUARD); PAGE_READWRITE | PAGE_GUARD);
if ((NT_SUCCESS(Status) || (Status == STATUS_ALREADY_COMMITTED))) if ((NT_SUCCESS(Status) || (Status == STATUS_ALREADY_COMMITTED)))