From: Cameron Gutman <aicommander@gmail.com>
Date: Tue, 29 Nov 2011 04:22:51 +0000 (+0000)
Subject: [NTOSKRNL]
X-Git-Tag: backups/usb-bringup@55523~3^2~270
X-Git-Url: https://git.reactos.org/?p=reactos.git;a=commitdiff_plain;h=63db6b034d71cc5230af7848b46064b61f814eec;hp=11b737b0e81ca1788ebd8433aa84a74cad54c408

[NTOSKRNL]
- Add missing user PFN bitmap locking in MmRemoveLRUUserPage

svn path=/trunk/; revision=54531
---

diff --git a/reactos/ntoskrnl/mm/freelist.c b/reactos/ntoskrnl/mm/freelist.c
index f8efc073964..308c323f5d0 100644
--- a/reactos/ntoskrnl/mm/freelist.c
+++ b/reactos/ntoskrnl/mm/freelist.c
@@ -121,11 +121,15 @@ VOID
 NTAPI
 MmRemoveLRUUserPage(PFN_NUMBER Page)
 {
+    KIRQL OldIrql;
+
     /* Unset the page as a user page */
     ASSERT(Page != 0);
     ASSERT_IS_ROS_PFN(MiGetPfnEntry(Page));
     ASSERT(RtlCheckBit(&MiUserPfnBitMap, (ULONG)Page));
+    OldIrql = KeAcquireQueuedSpinLock(LockQueuePfnLock);
     RtlClearBit(&MiUserPfnBitMap, (ULONG)Page);
+    KeReleaseQueuedSpinLock(LockQueuePfnLock, OldIrql);
 }
 
 BOOLEAN