linux-kernel - Re: [syzbot] KASAN: use-after-free Read in idr_for

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Message-ID: <a9eeb6ef-79dd-0185-4ec0-87b6101be9e4@gmail.com>
Date:   Mon, 19 Apr 2021 13:09:03 +0100
From:   Pavel Begunkov <asml.silence@...il.com>
To:     syzbot <syzbot+12056a09a0311d758e60@...kaller.appspotmail.com>,
        axboe@...nel.dk, egiptomarmol@...castone.com, hdanton@...a.com,
        io-uring@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, mail@...rudhrb.com,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk,
        willy@...radead.org
Subject: Re: [syzbot] KASAN: use-after-free Read in idr_for_each (2)

On 4/15/21 7:28 PM, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit 61cf93700fe6359552848ed5e3becba6cd760efa
> Author: Matthew Wilcox (Oracle) <willy@...radead.org>
> Date:   Mon Mar 8 14:16:16 2021 +0000
> 
>     io_uring: Convert personality_idr to XArray
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16f91b9ad00000
> start commit:   dd86e7fa Merge tag 'pci-v5.11-fixes-2' of git://git.kernel..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=e83e68d0a6aba5f6
> dashboard link: https://syzkaller.appspot.com/bug?extid=12056a09a0311d758e60
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=174b80ef500000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=165522d4d00000
> 
> If the result looks correct, please mark the issue as fixed by replying with:
> 
> #syz fix: io_uring: Convert personality_idr to XArray
> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

#syz fix: io_uring: Convert personality_idr to XArray

-- 
Pavel Begunkov