Re: [PATCH v3 0/5] aio: fix use-after-free and missing wakeups

[Jens Axboe]

On 12/9/21 11:00 AM, Linus Torvalds wrote:
> On Wed, Dec 8, 2021 at 5:06 PM Eric Biggers <ebiggers@xxxxxxxxxx> wrote:
>>
>> Careful review is appreciated; the aio poll code is very hard to work
>> with, and it doesn't appear to have many tests.  I've verified that it
>> passes the libaio test suite, which provides some coverage of poll.
>>
>> Note, it looks like io_uring has the same bugs as aio poll.  I haven't
>> tried to fix io_uring.
> 
> I'm hoping Jens is looking at the io_ring case, but I'm also assuming
> that I'll just get a pull request for this at some point.

Yes, when I saw this original posting I did discuss it with Pavel as
well, and we agree that the same issue exists there. Which isn't too
surprising, as that's where the io_uring poll code from originally.

Eric, do you have a test case for this? aio is fine, we can convert it
to io_uring as well. Would be nice for both verifying the fix, but also
to carry in the io_uring regression tests for the future.

-- 
Jens Axboe