Date: Wed, 24 Feb 2021 21:47:58 -0800 From: James Gritton <jamie@freebsd.org> To: Kyle Evans <kevans@freebsd.org> Cc: Alexander Richardson <arichardson@freebsd.org>, src-committers <src-committers@freebsd.org>, <dev-commits-src-all@freebsd.org>, dev-commits-src-main@freebsd.org Subject: Re: git: 811e27fa3c44 - main - jail: Add PD_KILL to remove a prison in prison_deref(). Message-ID: <ef7f77caf1cc07b5963c52a0b720e5d4@freebsd.org> In-Reply-To: <CACNAnaFWbfS2W-ayW-WnCzD-vJzBH2mYYx95Cgsha5k07hHXRQ@mail.gmail.com> References: <202102222027.11MKRtcl033616@gitrepo.freebsd.org> <CA%2BZ_v8rKZjuGzbOEbHNJxQ1uU5ZfjpoK6C3SOYNJWO2qxqOwzw@mail.gmail.com> <CACNAnaFWbfS2W-ayW-WnCzD-vJzBH2mYYx95Cgsha5k07hHXRQ@mail.gmail.com>
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On 2021-02-24 21:29, Kyle Evans wrote: > On Tue, Feb 23, 2021 at 7:16 AM Alexander Richardson > <arichardson@freebsd.org> wrote: >> >> On Mon, 22 Feb 2021 at 20:28, Jamie Gritton <jamie@freebsd.org> wrote: >> > >> > The branch main has been updated by jamie: >> > >> > URL: https://cgit.FreeBSD.org/src/commit/?id=811e27fa3c445664e36071a7d08228fc7fb85676 >> > >> > commit 811e27fa3c445664e36071a7d08228fc7fb85676 >> > Author: Jamie Gritton <jamie@FreeBSD.org> >> > AuthorDate: 2021-02-22 20:27:44 +0000 >> > Commit: Jamie Gritton <jamie@FreeBSD.org> >> > CommitDate: 2021-02-22 20:27:44 +0000 >> > >> > jail: Add PD_KILL to remove a prison in prison_deref(). >> > >> > Add the PD_KILL flag that instructs prison_deref() to take steps >> > to actively kill a prison and its descendents, namely marking it >> > PRISON_STATE_DYING, clearing its PR_PERSIST flag, and killing any >> > attached processes. >> > >> > This replaces a similar loop in sys_jail_remove(), bringing the >> > operation under the same single hold on allprison_lock that it already >> > has. It is also used to clean up failed jail (re-)creations in >> > kern_jail_set(), which didn't generally take all the proper steps. >> > >> > Differential Revision: https://reviews.freebsd.org/D28473 >> >> Hi Jamie, >> >> After this commit running cd /usr/tests/lib/libc/sys && kyua test >> cpuset_test renders the entire system unusable: all exec calls >> afterwards seem to fail. In Jenkins it's triggering a kernel panic: >> https://ci.freebsd.org/job/FreeBSD-main-amd64-test/17630/consoleFull >> Reverting this commit fixes the issue. >> > > Based on the backtrace and a wild stab in the dark, the last > prison_deref() in do_jail_attach() prior to successful return should > explicitly clear the PD_KILL flag from drflags. > > Thanks, > > Kyle Evans Yep, that's what's doing it. Actually, PD_KILL has no business being passed to do_jail_attach in the first place. Running a test on that right now. - Jamie
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