linux-kernel - Re: [PATCH] Revert "Smack: Handle io

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Date:   Fri, 26 Mar 2021 10:05:03 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Casey Schaufler <casey@...aufler-ca.com>
Cc:     linux-security-module@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Revert "Smack: Handle io_uring kernel thread privileges"

On 3/26/21 10:00 AM, Casey Schaufler wrote:
> On 3/25/2021 5:42 PM, Jens Axboe wrote:
>> This reverts commit 942cb357ae7d9249088e3687ee6a00ed2745a0c7.
>>
>> The io_uring PF_IO_WORKER threads no longer have PF_KTHREAD set, so no
>> need to special case them for credential checks.
> 
> Could you cite the commit making that change?
> I wouldn't want to see this change back-ported to a kernel
> that doesn't have that change as well.

This is strictly 5.12+. The change came about from:

commit 3bfe6106693b6b4ba175ad1f929c4660b8f59ca8
Author: Jens Axboe <axboe@...nel.dk>
Date:   Tue Feb 16 14:15:30 2021 -0700

    io-wq: fork worker threads from original task

So don't backport it.

-- 
Jens Axboe