> 
> On 11/10/26 1:42 AM, 铮 wrote:
>> Hi Stefan,
>>
>> Thank you for your question about closing the server-side fd.
>>
>> Short answer: yes, the server-side fds are released when the
>> reproducer exits, and the hang occurs during that release. The hang
>> reproduced in 4/4 recorded exit-time release attempts (three with N=32
>> and one with N=4). However, our separate tests that explicitly call
>> close() on every ioctl-returned fd did NOT reproduce the hang.
> 

Thanks, your supplied C-program made reproducing this issue 
straight-forward. A patch resolving this issue is attached.

    Stefan