https://git.reactos.org/?p=reactos.git;a=commitdiff;h=f66a7e2e482f6dbcf171018a60e6807d5a66a6ba
commit f66a7e2e482f6dbcf171018a60e6807d5a66a6ba Author: Timo Kreuzer <[email protected]> AuthorDate: Mon Jan 6 00:51:43 2020 +0100 Commit: Timo Kreuzer <[email protected]> CommitDate: Sat Oct 31 14:23:16 2020 +0100 [NTOS:KE:X64] Zero out the context in KiDispatchException --- ntoskrnl/ke/amd64/except.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/ntoskrnl/ke/amd64/except.c b/ntoskrnl/ke/amd64/except.c index 23ff7e016a9..40b01064d84 100644 --- a/ntoskrnl/ke/amd64/except.c +++ b/ntoskrnl/ke/amd64/except.c @@ -245,10 +245,13 @@ KiDispatchException(IN PEXCEPTION_RECORD ExceptionRecord, /* Increase number of Exception Dispatches */ KeGetCurrentPrcb()->KeExceptionDispatchCount++; + /* Zero out the context to avoid leaking kernel stack memor to user mode */ + RtlZeroMemory(&Context, sizeof(Context)); + /* Set the context flags */ Context.ContextFlags = CONTEXT_ALL; - /* Get a Context */ + /* Get the Context from the trap and exception frame */ KeTrapFrameToContext(TrapFrame, ExceptionFrame, &Context); /* Look at our exception code */
