Hi,
On 4.14, 4.19, 5.4, and 5.10, listen() does not return -EADDRINUSE when
it fails to reserve a port.
The same issue happend on 5.15.88 and fdaf88531cfd ("tcp: Fix listen()
regression in 5.15.88.") in the 5.15.y branch fixed it.
The commit can be applied cleanly to 4.19, 5.4, and 5.10.
Could you backport the commit to these branch ?
For 4.14.y, I'll post another patch.
Thanks,
Kuniyuki
