From: Daniel Jordan <daniel.m.jordan@oracle.com>
To: Nicolai Stange <nstange@suse.de>
Cc: Steffen Klassert <steffen.klassert@secunet.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Martin Doucha <mdoucha@suse.cz>,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/5] padata: fix liftime issues after ->serial() has completed
Date: Fri, 21 Oct 2022 17:35:40 -0400 [thread overview]
Message-ID: <20221021213540.7zlhwbbbp7og4lrl@parnassus.localdomain> (raw)
In-Reply-To: <20221019083708.27138-1-nstange@suse.de>
Hi Nicolai,
On Wed, Oct 19, 2022 at 10:37:03AM +0200, Nicolai Stange wrote:
> Hi all,
>
> this series is supposed to fix some lifetime issues all related to the fact that
> once the last ->serial() has been invoked, the padata user (i.e. pcrypt) is well
> with its right to tear down the associated padata_shell or parallel_data
> instance respectively.
>
> Only the first one, addressed by patch [2/5], has actually been observed, namely
> on a (downstream) RT kernel under a very specific workload involving LTP's
> pcrypt_aead01. On non-RT, I've been unable to reproduce.
I haven't been able to hit the issue in 2/5 on RT on a v6.0 kernel in an
x86 vm. Were there any other things running on the system besides
pcrypt_aead01? More details about your environment and your kernel
config would be helpful.
The first two patches seem ok but I want to think about the second more
next week. I'll look over the rest of the series then too.
next prev parent reply other threads:[~2022-10-21 21:36 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-19 8:37 [PATCH 0/5] padata: fix liftime issues after ->serial() has completed Nicolai Stange
2022-10-19 8:37 ` [PATCH 1/5] padata: introduce internal padata_get/put_pd() helpers Nicolai Stange
2022-10-28 14:23 ` Daniel Jordan
2022-10-19 8:37 ` [PATCH 2/5] padata: make padata_free_shell() to respect pd's ->refcnt Nicolai Stange
2022-10-28 14:35 ` Daniel Jordan
2022-10-28 16:22 ` Daniel Jordan
2022-11-09 13:02 ` Nicolai Stange
2022-11-10 22:05 ` Daniel Jordan
2022-10-19 8:37 ` [PATCH 3/5] padata: grab parallel_data refcnt for reorder Nicolai Stange
2022-10-28 16:04 ` Daniel Jordan
2022-11-09 13:03 ` Nicolai Stange
2022-11-10 23:16 ` Daniel Jordan
2022-10-19 8:37 ` [PATCH 4/5] padata: split out dequeue operation from padata_find_next() Nicolai Stange
2022-10-19 8:37 ` [PATCH 5/5] padata: avoid potential UAFs to the padata_shell from padata_reorder() Nicolai Stange
2022-10-28 16:14 ` Daniel Jordan
2022-11-09 13:03 ` Nicolai Stange
2022-11-10 23:22 ` Daniel Jordan
2022-10-21 21:35 ` Daniel Jordan [this message]
2022-10-24 8:47 ` [PATCH 0/5] padata: fix liftime issues after ->serial() has completed Nicolai Stange
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