From: Jens Axboe <axboe@kernel.dk>
To: Lee Jones <lee@kernel.org>
Cc: stable@vger.kernel.org, Pavel Begunkov <asml.silence@gmail.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v5.10 1/1] io_uring: Use original task for req identity in io_identity_cow()
Date: Wed, 20 Jul 2022 06:48:09 -0600 [thread overview]
Message-ID: <17dba691-2a2b-4b20-40c3-ec77282179b0@kernel.dk> (raw)
In-Reply-To: <20220719115251.441526-1-lee@kernel.org>
On 7/19/22 5:52 AM, Lee Jones wrote:
> This issue is conceptually identical to the one fixed in 29f077d07051
> ("io_uring: always use original task when preparing req identity"), so
> rather than reinvent the wheel, I'm shamelessly quoting the commit
> message from that patch - thanks Jens:
>
> "If the ring is setup with IORING_SETUP_IOPOLL and we have more than
> one task doing submissions on a ring, we can up in a situation where
> we assign the context from the current task rather than the request
> originator.
>
> Always use req->task rather than assume it's the same as current.
>
> No upstream patch exists for this issue, as only older kernels with
> the non-native workers have this problem."
Greg, can you pick this one up for 5.10-stable? Thanks!
--
Jens Axboe
next prev parent reply other threads:[~2022-07-20 12:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-19 11:52 [PATCH v5.10 1/1] io_uring: Use original task for req identity in io_identity_cow() Lee Jones
2022-07-20 12:48 ` Jens Axboe [this message]
2022-07-23 13:54 ` Greg KH
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