From: Lukas Bulwahn <lukas.bulwahn@gmail.com>
To: Pavel Begunkov <asml.silence@gmail.com>, Jens Axboe <axboe@kernel.dk>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
io-uring@vger.kernel.org
Subject: Observation of a memory leak with commit e98e49b2bbf7 ("io_uring: extend task put optimisations")
Date: Fri, 7 Jan 2022 16:00:39 +0100 [thread overview]
Message-ID: <CAKXUXMzHUi3q4K-OpiBKyMAsQ2K=FOsVzULC76v05nCUKNCA+Q@mail.gmail.com> (raw)
Dear Pavel, dear Jens,
In our syzkaller instance running on linux-next,
https://elisa-builder-00.iol.unh.edu/syzkaller-next/, we have been
observing a memory leak in copy_process for quite some time.
It is reproducible on v5.15-rc1, v5.15, v5.16-rc8 and next-20220106:
https://elisa-builder-00.iol.unh.edu/syzkaller-next/crash?id=1169da08a3e72457301987b70bcce62f0f49bdbb
So, it is in mainline, was released and has not been fixed in linux-next yet.
As syzkaller also provides a reproducer, we bisected this memory leak
to be introduced with commit e98e49b2bbf7 ("io_uring: extend task put
optimisations").
Could you please have a look how your commit introduces this memory
leak? We will gladly support testing your fix in case help is needed.
Best regards,
Lukas
next reply other threads:[~2022-01-07 15:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-07 15:00 Lukas Bulwahn [this message]
2022-01-07 16:22 ` Observation of a memory leak with commit e98e49b2bbf7 ("io_uring: extend task put optimisations") Pavel Begunkov
2022-01-09 0:57 ` Pavel Begunkov
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