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[CSRSRV] Acquire the necessary SE_INC_BASE_PRIORITY_PRIVILEGE at shutdown (#4461)

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When increasing the base priority at shutdown, acquire the necessary
SE_INC_BASE_PRIORITY_PRIVILEGE in CsrSetToShutdownPriority(),
called by CsrShutdownProcesses(), which is necessary due to the increase
of process base priority (i.e. increase of scheduling) being done.

Dedicated to George Bișoc :)

The Shutdown privilege is however unnecessary (or unwanted) since this
has been already dealt with by the shutdown caller. Also, it will be
needed only by the caller of NtShutdownSystem() -- that we don't call
at all here.
This commit is contained in:
Hermès Bélusca-Maïto 2022-04-20 03:31:08 +02:00
parent 0d08c6429d
commit ff293a1877
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1 changed files with 4 additions and 4 deletions
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8
subsystems/win32/csrsrv/procsup.c
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@ -64,8 +64,8 @@ CsrSetToNormalPriority(VOID)
* @name CsrSetToShutdownPriority * @name CsrSetToShutdownPriority
* *
* The CsrSetToShutdownPriority routine sets the current NT Process' * The CsrSetToShutdownPriority routine sets the current NT Process'
* priority to the boosted priority for CSR Processes doing shutdown. * priority to the boosted priority for CSR Processes doing shutdown,
* Additonally, it acquires the Shutdown Privilege required for shutdown. * acquiring also the required Increase Base Priority privilege.
* *
* @param None. * @param None.
* *
@ -82,8 +82,8 @@ CsrSetToShutdownPriority(VOID)
KPRIORITY BasePriority = PROCESS_PRIORITY_NORMAL_FOREGROUND + 6; KPRIORITY BasePriority = PROCESS_PRIORITY_NORMAL_FOREGROUND + 6;
BOOLEAN Old; BOOLEAN Old;
/* Get the shutdown privilege */ /* Get the Increase Base Priority privilege */
if (NT_SUCCESS(RtlAdjustPrivilege(SE_SHUTDOWN_PRIVILEGE, if (NT_SUCCESS(RtlAdjustPrivilege(SE_INC_BASE_PRIORITY_PRIVILEGE,
TRUE, TRUE,
FALSE, FALSE,
&Old))) &Old)))