Re: [PATCH net v3 2/3] selftest/bpf: Add test for AF_VSOCK connect() racing sockmap update

[Michal Luczaj]

On 3/17/25 09:23, Paolo Abeni wrote:
> On 3/16/25 11:45 PM, Michal Luczaj wrote:
>> Racing signal-interrupted connect() and sockmap update may result in an
>> unconnected (and missing vsock transport) socket in a sockmap.
>>
>> Test spends 2 seconds attempting to reach WARN_ON_ONCE().
>>
>> connect
>>   / state = SS_CONNECTED /
>>                                 sock_map_update_elem
>>   if signal_pending
>>     state = SS_UNCONNECTED
>>
>> connect
>>   transport = NULL
>>                                 vsock_bpf_recvmsg
>>                                   WARN_ON_ONCE(!vsk->transport)
>>
>> Signed-off-by: Michal Luczaj <mhal@xxxxxxx>
> 
> This is apparently causing some bpf self-test failure. (Timeout? the
> self-test failure output is not clear to me.)
> 
> Could you please have a look?

Sending signal to the whole process group probably isn't the best idea. Not
sure how the previous version passed though.
Sorry, v4 incoming.

Michal