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[NTOS:KE:X64] Zero out the context in KiDispatchException

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This commit is contained in:
Timo Kreuzer 2020-01-06 00:51:43 +01:00
parent 637183a12c
commit f66a7e2e48
1 changed files with 4 additions and 1 deletions
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5
ntoskrnl/ke/amd64/except.c
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@ -245,10 +245,13 @@ KiDispatchException(IN PEXCEPTION_RECORD ExceptionRecord,
/* Increase number of Exception Dispatches */ /* Increase number of Exception Dispatches */
KeGetCurrentPrcb()->KeExceptionDispatchCount++; KeGetCurrentPrcb()->KeExceptionDispatchCount++;
/* Zero out the context to avoid leaking kernel stack memor to user mode */
RtlZeroMemory(&Context, sizeof(Context));
/* Set the context flags */ /* Set the context flags */
Context.ContextFlags = CONTEXT_ALL; Context.ContextFlags = CONTEXT_ALL;
/* Get a Context */ /* Get the Context from the trap and exception frame */
KeTrapFrameToContext(TrapFrame, ExceptionFrame, &Context); KeTrapFrameToContext(TrapFrame, ExceptionFrame, &Context);
/* Look at our exception code */ /* Look at our exception code */