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From:   Dipanjan Das <mail.dipanjan.das@gmail.com>
Date:   Mon, 25 Jul 2022 22:00:30 -0700
Message-ID: <CANX2M5aYZ2kj+OZHUQF78O_fZoF0Oegytx4iFKjU+mAf9JtQbA@mail.gmail.com>
Subject: Re: KASAN: use-after-free Read in __io_remove_buffers
To:     Dylan Yudaken <dylany@fb.com>
Cc:     "io-uring@vger.kernel.org" <io-uring@vger.kernel.org>,
        "axboe@kernel.dk" <axboe@kernel.dk>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "asml.silence@gmail.com" <asml.silence@gmail.com>,
        "fleischermarius@googlemail.com" <fleischermarius@googlemail.com>,
        "syzkaller@googlegroups.com" <syzkaller@googlegroups.com>,
        "its.priyanka.bose@gmail.com" <its.priyanka.bose@gmail.com>
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> On Thu, Jul 21, 2022 at 4:06 AM Dylan Yudaken <dylany@fb.com> wrote:
> >
> > Both of the bug reports you sent seem to be fixed by the patch I just
> > sent.
> >
> > This one however does not seem to terminate once fixed. Is there an
> > expected run time?
>

We can confirm that the C-repro hangs while the syz-repro does not.
For the unpatched kernel, the repro triggers the bug in less than a
minute.


-- 
Thanks and Regards,

Dipanjan