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[NTUSER] NtUserWaitForInputIdle: Fix unhandled exception BSOD 0x1E (#5391)

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Fix CLIENTINFO usermode pointer access once again.
Based on a patch by Michael Fritscher from CORE-10017.
Addendum to 7052282507 (r68702).

CORE-18728 CORE-19014
This commit is contained in:
Thamatip Chitpong 2023-07-03 00:30:30 +07:00 committed by GitHub
parent 8e01dee251
commit c7e4c3a8e9
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1 changed files with 3 additions and 2 deletions
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5
win32ss/user/ntuser/message.c
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@ -3110,14 +3110,12 @@ NtUserWaitForInputIdle( IN HANDLE hProcess,
Timeout.QuadPart = (LONGLONG) dwMilliseconds * (LONGLONG) -10000; Timeout.QuadPart = (LONGLONG) dwMilliseconds * (LONGLONG) -10000;
KeStackAttachProcess(&Process->Pcb, &ApcState); KeStackAttachProcess(&Process->Pcb, &ApcState);
W32Process->W32PF_flags |= W32PF_WAITFORINPUTIDLE; W32Process->W32PF_flags |= W32PF_WAITFORINPUTIDLE;
for (pti = W32Process->ptiList; pti; pti = pti->ptiSibling) for (pti = W32Process->ptiList; pti; pti = pti->ptiSibling)
{ {
pti->TIF_flags |= TIF_WAITFORINPUTIDLE; pti->TIF_flags |= TIF_WAITFORINPUTIDLE;
pti->pClientInfo->dwTIFlags = pti->TIF_flags; pti->pClientInfo->dwTIFlags = pti->TIF_flags;
} }
KeUnstackDetachProcess(&ApcState); KeUnstackDetachProcess(&ApcState);
TRACE("WFII: ppi %p\n", W32Process); TRACE("WFII: ppi %p\n", W32Process);
@ -3176,12 +3174,15 @@ NtUserWaitForInputIdle( IN HANDLE hProcess,
while (TRUE); while (TRUE);
WaitExit: WaitExit:
KeStackAttachProcess(&Process->Pcb, &ApcState);
for (pti = W32Process->ptiList; pti; pti = pti->ptiSibling) for (pti = W32Process->ptiList; pti; pti = pti->ptiSibling)
{ {
pti->TIF_flags &= ~TIF_WAITFORINPUTIDLE; pti->TIF_flags &= ~TIF_WAITFORINPUTIDLE;
pti->pClientInfo->dwTIFlags = pti->TIF_flags; pti->pClientInfo->dwTIFlags = pti->TIF_flags;
} }
W32Process->W32PF_flags &= ~W32PF_WAITFORINPUTIDLE; W32Process->W32PF_flags &= ~W32PF_WAITFORINPUTIDLE;
KeUnstackDetachProcess(&ApcState);
IntDereferenceProcessInfo(W32Process); IntDereferenceProcessInfo(W32Process);
ObDereferenceObject(Process); ObDereferenceObject(Process);
UserLeave(); UserLeave();