linux-kernel - Re: [PATCH 6.6] Revert "dm-crypt, dm-verity: disable tasklets"

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Message-ID: <2024041103-reputable-bobsled-585f@gregkh>
Date: Thu, 11 Apr 2024 11:52:42 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Li Lingfeng <lilingfeng3@...wei.com>
Cc: stable@...r.kernel.org, mpatocka@...hat.com,
	torvalds@...ux-foundation.org, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, dm-devel@...ts.linux.dev,
	msnitzer@...hat.com, ignat@...udflare.com, damien.lemoal@....com,
	bob.liu@...cle.com, houtao1@...wei.com, nhuck@...gle.com,
	peterz@...radead.org, mingo@...e.hu, yukuai3@...wei.com,
	yangerkun@...wei.com, yi.zhang@...wei.com,
	lilingfeng@...weicloud.com
Subject: Re: [PATCH 6.6] Revert "dm-crypt, dm-verity: disable tasklets"

On Thu, Apr 11, 2024 at 05:15:39PM +0800, Li Lingfeng wrote:
> This reverts commit 5735a2671ffb70ea29ca83969fe01316ee2ed6fc which is
> commit 0a9bab391e336489169b95cb0d4553d921302189 upstream.
> 
> Tasklet is thought to cause memory corruption [1], so it was disabled in
> dm-crypt and dm-verity. However, memory corruption may not happen since
> cc->io_queue is created without WQ_UNBOUND [2].
> Revert commit 5735a2671ffb ("dm-crypt, dm-verity: disable tasklets") to
> bring tasklet back.
> 
> [1] https://lore.kernel.org/all/d390d7ee-f142-44d3-822a-87949e14608b@suse.de/T/
> [2] https://lore.kernel.org/all/4d331659-badd-749d-fba1-271543631a8a@huawei.com/
> 
> Signed-off-by: Li Lingfeng <lilingfeng3@...wei.com>
> ---
>  drivers/md/dm-crypt.c         | 38 +++++++++++++++++++++++++++++++++--
>  drivers/md/dm-verity-target.c | 26 ++++++++++++++++++++++--
>  drivers/md/dm-verity.h        |  1 +
>  3 files changed, 61 insertions(+), 4 deletions(-)

What is the commit id of this in Linus's tree?  And why only 6.6.y?

thanks,

greg k-h