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Date:      Tue, 27 Jun 2017 10:16:21 -0400
From:      Shawn Webb <shawn.webb@hardenedbsd.org>
To:        Andriy Gapon <avg@FreeBSD.org>
Cc:        freebsd-current@FreeBSD.org
Subject:   Re: ZFS ABD Panic
Message-ID:  <20170627141621.eflvmf53goy45dzh@mutt-hbsd>
In-Reply-To: <61824b1e-9582-b50f-a55d-5ef4731383d0@FreeBSD.org>
References:  <20170626003129.ao72cszn7eeccyhp@mutt-hbsd> <61824b1e-9582-b50f-a55d-5ef4731383d0@FreeBSD.org>

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On Tue, Jun 27, 2017 at 05:12:01PM +0300, Andriy Gapon wrote:
> On 26/06/2017 03:31, Shawn Webb wrote:
> > This is on the latest HardenedBSD 12-CURRENT on one of my servers:
> >=20
> > [141] panic: sleepq_add: td 0xfffff80008d20560 to sleep on wchan 0xffff=
f803b7d4e810 with sleeping prohibited
> > [141] cpuid =3D 5
> > [141] time =3D 1498436043
> > [141] KDB: stack backtrace:
> > [141] db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfff=
ffe00002fc8b0
> > [141] vpanic() at vpanic+0x19c/frame 0xfffffe00002fc930
> > [141] kassert_panic() at kassert_panic+0x126/frame 0xfffffe00002fc9a0
> > [141] sleepq_add() at sleepq_add+0x34f/frame 0xfffffe00002fc9f0
> > [141] _sx_xlock_hard() at _sx_xlock_hard+0x2a4/frame 0xfffffe00002fcaa0
> > [141] _sx_xlock() at _sx_xlock+0x98/frame 0xfffffe00002fcae0
> > [141] refcount_remove_many() at refcount_remove_many+0x2a/frame 0xfffff=
e00002fcb20
> > [141] abd_return_buf() at abd_return_buf+0xe3/frame 0xfffffe00002fcb50
> > [141] vdev_geom_io_intr() at vdev_geom_io_intr+0x114/frame 0xfffffe0000=
2fcb70
> > [141] g_io_schedule_up() at g_io_schedule_up+0x42/frame 0xfffffe00002fc=
ba0
> > [141] g_up_procbody() at g_up_procbody+0x6d/frame 0xfffffe00002fcbb0
> > [141] fork_exit() at fork_exit+0x84/frame 0xfffffe00002fcbf0
> > [141] fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00002fcbf0
>=20
> Seems like another architectural incompatibility between illumos and Free=
BSD.
> Are you able to reproduce the crash more or less reliably?

Yup. I just need to do a buildworld and it's triggered.

--=20
Shawn Webb
Cofounder and Security Engineer
HardenedBSD

GPG Key ID:          0x6A84658F52456EEE
GPG Key Fingerprint: 2ABA B6BD EF6A F486 BE89  3D9E 6A84 658F 5245 6EEE

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