[PATCH] user32: Fix NULL dereference in UnregisterDeviceNotification

[Roman Pišl]

Hello,
I have the same fix in my repo and finally spared some time to fill a 
bug report: https://bugs.winehq.org/show_bug.cgi?id=49211

Regards
Roman

Dne 20. 05. 20 v 16:01 Zebediah Figura napsal(a):
> On 5/20/20 7:14 AM, Zhiyi Zhang wrote:
>> Hi Arkadiusz,
>>
>> Checking NULL is usually fine. But I think you should add the tests to 
>> sechost.
>> There are also
>> https://github.com/ValveSoftware/wine/commit/bbcd2686d599adf6c5cc8e8466ade0b2c2e5f38a 
>>
>> https://github.com/ValveSoftware/wine/commit/2d5d0a50652e13254fef3d13df14d3b01efda938 
>>
>>
>> I haven't look at if I_ScUnregisterDeviceNotification() is already 
>> fully implemented.
>> But if it is not, it would be more useful to get it upstream rather 
>> than simply checking NULL.
>> If checking NULL is enough to fix a real world application and you 
>> think upstreamming
>> the work is too much for you then a simple NULL fix is also fine.
> 
> Personally, I think the test makes sense where it is.
> 
> On the other hand, it'd be nice to mention in the commit message what 
> application is fixed by this.
>