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Date: Sat, 9 Mar 2019 01:21:27 +0900
From: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
To: cygwin AT cygwin DOT com
Subject: Re: Logging-in using ssh elevates the user privilege.
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On Fri, 8 Mar 2019 16:56:35 +0100 Corinna Vinschen wrote:
> > Does this affect to listen() as well?
> 
> No, listen isn't affected.

The cause is failure of setsockopt().
setsockopt() before accept() failed with EALREADY.

I looked into fhandler_sock_local.cc.

In fhandler_socket_local::af_local_set_no_getpeereid(),
connect_state() is checked if it is 'unconnected', however,
it is 'listener' after listen() is called. So it failed.

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

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