[reactos] 01/03: [NTOS:CM] Set and reset the CMHIVE HiveIsLoading flag adequately. Fix an assertion in CmFlushKey() and reset the CMHIVE ViewLockOwner when releasing the view lock.

[Hermès Bélusca-Maïto]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=83fdb9a6d96ac86b4b02a…

commit 83fdb9a6d96ac86b4b02afc716a421336a6f2903
Author:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
AuthorDate: Sun Feb 17 00:54:59 2019 +0100
Commit:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
CommitDate: Sun Feb 17 01:21:35 2019 +0100

    [NTOS:CM] Set and reset the CMHIVE HiveIsLoading flag adequately. Fix an assertion in
CmFlushKey() and reset the CMHIVE ViewLockOwner when releasing the view lock.
---
 ntoskrnl/config/cmapi.c  | 20 +++++++++++++++++---
 ntoskrnl/config/cminit.c |  5 ++++-
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/ntoskrnl/config/cmapi.c b/ntoskrnl/config/cmapi.c
index 3b1455df1a..fe81bbc305 100644
--- a/ntoskrnl/config/cmapi.c
+++ b/ntoskrnl/config/cmapi.c
@@ -1959,6 +1959,7 @@ CmFlushKey(IN PCM_KEY_CONTROL_BLOCK Kcb,
     {
         /* Don't touch the hive */
         CmpLockHiveFlusherExclusive(CmHive);
+
         ASSERT(CmHive->ViewLock);
         KeAcquireGuardedMutex(CmHive->ViewLock);
         CmHive->ViewLockOwner = KeGetCurrentThread();
@@ -1968,13 +1969,18 @@ CmFlushKey(IN PCM_KEY_CONTROL_BLOCK Kcb,
         {
             /* I don't believe the current Hv does shrinking */
             ASSERT(FALSE);
+            // CMP_ASSERT_EXCLUSIVE_REGISTRY_LOCK_OR_LOADING(CmHive);
         }
         else
         {
             /* Now we can release views */
             ASSERT(CmHive->ViewLock);
-            CMP_ASSERT_EXCLUSIVE_REGISTRY_LOCK_OR_LOADING(CmHive);
-            ASSERT(KeGetCurrentThread() == CmHive->ViewLockOwner);
+            // CMP_ASSERT_VIEW_LOCK_OWNED(CmHive);
+            ASSERT((CmpSpecialBootCondition == TRUE) ||
+                   (CmHive->HiveIsLoading == TRUE) ||
+                   (CmHive->ViewLockOwner == KeGetCurrentThread()) ||
+                   (CmpTestRegistryLockExclusive() == TRUE));
+            CmHive->ViewLockOwner = NULL;
             KeReleaseGuardedMutex(CmHive->ViewLock);
         }
 
@@ -2240,6 +2246,9 @@ CmUnloadKey(IN PCM_KEY_CONTROL_BLOCK Kcb,
         }
     }
 
+    /* Set the loading flag */
+    CmHive->HiveIsLoading = TRUE;
+
     /* Flush the hive */
     CmFlushKey(Kcb, TRUE);
 
@@ -2248,8 +2257,13 @@ CmUnloadKey(IN PCM_KEY_CONTROL_BLOCK Kcb,
     {
         DPRINT("CmpUnlinkHiveFromMaster() failed!\n");
 
-        /* Remove the unloading flag and return failure */
+        /* Remove the unloading flag */
         Hive->HiveFlags &= ~HIVE_IS_UNLOADING;
+
+        /* Reset the loading flag */
+        CmHive->HiveIsLoading = FALSE;
+
+        /* Return failure */
         return STATUS_INSUFFICIENT_RESOURCES;
     }
 
diff --git a/ntoskrnl/config/cminit.c b/ntoskrnl/config/cminit.c
index bf055fd914..5d8ea07276 100644
--- a/ntoskrnl/config/cminit.c
+++ b/ntoskrnl/config/cminit.c
@@ -102,7 +102,7 @@ CmpInitializeHive(OUT PCMHIVE *CmHive,
     Hive->NotifyList.Flink = NULL;
     Hive->NotifyList.Blink = NULL;
 
-    /* Set loading flag */
+    /* Set the loading flag */
     Hive->HiveIsLoading = TRUE;
 
     /* Set the current thread as creator */
@@ -213,6 +213,9 @@ CmpInitializeHive(OUT PCMHIVE *CmHive,
         }
     }
 
+    /* Reset the loading flag */
+    Hive->HiveIsLoading = FALSE;
+
     /* Lock the hive list */
     ExAcquirePushLockExclusive(&CmpHiveListHeadLock);