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[WIN32K]

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Do not go beyond the MouseHistoryOfMoves[] bounds. Fixes a crash in Win32k.

svn path=/trunk/; revision=52887
This commit is contained in:
Dmitry Gorbachev 2011-07-26 03:24:48 +00:00
parent 21b5c3a4ec
commit 98e48b5a92
1 changed files with 2 additions and 1 deletions
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3
reactos/subsystems/win32/win32k/ntuser/msgqueue.c
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@ -616,7 +616,8 @@ co_MsqInsertMouseMessage(MSG* Msg, DWORD flags, ULONG_PTR dwExtraInfo, BOOL Hook
MouseHistoryOfMoves[gcur_count].y = Msg->pt.y;
MouseHistoryOfMoves[gcur_count].time = Msg->time;
MouseHistoryOfMoves[gcur_count].dwExtraInfo = dwExtraInfo;
if (gcur_count++ == 64) gcur_count = 0; // 0 - 63 is 64, FIFO forwards.
if (++gcur_count == ARRAYSIZE(MouseHistoryOfMoves))
gcur_count = 0; // 0 - 63 is 64, FIFO forwards.
}
//