On 12/9/21 11:00 AM, Linus Torvalds wrote:

On Wed, Dec 8, 2021 at 5:06 PM Eric Biggers [off-list ref] wrote:

quoted

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