netkvm: deregister miniport in erroneous path

https://issues.redhat.com/browse/RHEL-68725 The problem can be reproduced under driver verifier with low resource simulation. If the miniport is registered but the protocol fail to register we need to deregister the miniport. Otherwise in future attempts to load the driver the NDIS enters erroneous state and may issue BSOD. Example of BSOD: BUGCODE_NDIS_DRIVER/NDIS_BUGCHECK_REFCOUNT_IMBALANCE. Signed-off-by: Yuri Benditovich <[email protected]>
ybendito · Nov 29, 2024 · 9991311 · 9991311
1 parent 379f291
commit 9991311
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/NetKVM/wlh/ParaNdis6_Driver.cpp b/NetKVM/wlh/ParaNdis6_Driver.cpp
@@ -1199,6 +1199,10 @@ NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObject, PUNICODE_STRING pRegistryPath
     else
     {
         DEBUG_EXIT_STATUS(0, status);
+        if (DriverHandle)
+        {
+            NdisMDeregisterMiniportDriver(DriverHandle);
+        }
         ParaNdis_DebugCleanup(pDriverObject);
 #ifdef NETKVM_WPP_ENABLED
         WPP_CLEANUP(pDriverObject);