linux-kernel - Re: futex+io_uring: futex_q::task can maybe be dangling (but is not actually accessed, so it's fine)

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Message-ID: <87msfsatyb.ffs@tglx>
Date: Wed, 15 Jan 2025 18:05:32 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Jens Axboe <axboe@...nel.dk>, Peter Zijlstra <peterz@...radead.org>
Cc: Jann Horn <jannh@...gle.com>, Ingo Molnar <mingo@...hat.com>, Darren
 Hart <dvhart@...radead.org>, Davidlohr Bueso <dave@...olabs.net>,
 André
 Almeida <andrealmeid@...lia.com>, kernel list
 <linux-kernel@...r.kernel.org>, Pavel Begunkov <asml.silence@...il.com>,
 io-uring <io-uring@...r.kernel.org>
Subject: Re: futex+io_uring: futex_q::task can maybe be dangling (but is not
 actually accessed, so it's fine)

On Wed, Jan 15 2025 at 08:32, Jens Axboe wrote:
> Here's the raw patch. Should've done this initially rather than just
> tackle __futex_queue(), for some reason I thought/assumed that
> futex_queue() was more widely used.

'git grep' is pretty useful to validate such assumptions :)

> What do you think?

Looks about right.

Thanks,

        tglx