Date: Wed, 6 May 2020 20:49:23 +0200 From: Kurt Jaeger <pi@freebsd.org> To: Kyle Evans <kevans@freebsd.org> Cc: jail@freebsd.org Subject: Re: Should killed process deref a jail? Message-ID: <20200506184923.GT39563@home.opsec.eu> In-Reply-To: <CACNAnaGssAKJ1-LhfQ1yszkOYkGw0iDsFgxmcuEZmTf9M-hyTg@mail.gmail.com> References: <CACNAnaGssAKJ1-LhfQ1yszkOYkGw0iDsFgxmcuEZmTf9M-hyTg@mail.gmail.com>
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Hi! > In doing some testing of qemu-user-static recently, I noticed that > killing the last process in a non-persist jail doesn't kill off the > jail: > > root@viper:/usr/src# jail -c path=/ command=yes > ## ^C out > > root@viper:/usr/src# jls > JID IP Address Hostname Path > 181 / > > root@viper:/usr/src# ps fxJ 181 > PID TT STAT TIME COMMAND > > As a result, I ended up with 82 jails pointed at my armv7 sysroot and > much surprise when I checked out `jls`. This vaguely smells like a > bug, is this something that should be fixed? Depends. If the last process held some socket and the socket is still in the state LINGER. See https://deepix.github.io/2016/10/21/tcprst.html for more details, after the heading 'What is SO_LINGER?' You can probably see those sockets with sockstat -s | grep -v ESTAB | grep -v LISTEN | grep -v TIME_WAIT | grep -v stream -- pi@opsec.eu +49 171 3101372 Now what ?
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