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[NTOSKRNL] Fix a nullptr dereference in IopStartDevice

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This commit is contained in:
Mark Jansen
2018-08-06 20:51:21 +02:00
parent 10c5bfb8fe
commit b2b1c054e4
1 changed files with 5 additions and 2 deletions
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ntoskrnl/io/pnpmgr/pnpmgr.c
+5 -2
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@@ -786,7 +786,7 @@ IopStartDevice(
{
NTSTATUS Status;
HANDLE InstanceHandle = NULL, ControlHandle = NULL;
UNICODE_STRING KeyName;
UNICODE_STRING KeyName, ValueString;
OBJECT_ATTRIBUTES ObjectAttributes;
if (DeviceNode->Flags & DNF_DISABLED)
@@ -817,7 +817,10 @@ IopStartDevice(
goto ByeBye;
RtlInitUnicodeString(&KeyName, L"ActiveService");
Status = ZwSetValueKey(ControlHandle, &KeyName, 0, REG_SZ, DeviceNode->ServiceName.Buffer, DeviceNode->ServiceName.Length + sizeof(UNICODE_NULL));
ValueString = DeviceNode->ServiceName;
if (!ValueString.Buffer)
RtlInitUnicodeString(&ValueString, L"");
Status = ZwSetValueKey(ControlHandle, &KeyName, 0, REG_SZ, ValueString.Buffer, ValueString.Length + sizeof(UNICODE_NULL));
// }
ByeBye: