[ros-bugs] [Bug 2083] New: gate.c - KeWaitForGate - Dispatcher lock may be left unreleased

[ReactOS.Bugzilla at www.reactos.org]

http://www.reactos.org/bugzilla/show_bug.cgi?id=2083

           Summary: gate.c - KeWaitForGate - Dispatcher lock may be left
                    unreleased
           Product: ReactOS
           Version: TRUNK
          Platform: x86 Hardware
        OS/Version: ReactOS
            Status: NEW
          Severity: major
          Priority: P3
         Component: Kernel
        AssignedTo: ros-bugs at reactos.org
        ReportedBy: barmaley_m at yahoo.com
         QAContact: ros-bugs at reactos.org


File: gate.c
Line: 78
Description:

If a gate is already signaled, KeWaitForGate exits quickly. All the locks which
have been previously acquired (The gate, Thread lock, Apc lock) are then
released before exiting. In one case, however, the dispatcher database lock may
have been acquired, but never released in the quick-exit branch.

Proposed fix:

Insert in gate.c, at line 78:

----- begin
/* Release the dispatcher if we have previously acquired it */
if (Queue) KiReleaseDispatcherLockFromDpcLevel();
----- end


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