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

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Date:   Thu, 15 Apr 2021 11:28:15 -0700
From:   syzbot <syzbot+12056a09a0311d758e60@...kaller.appspotmail.com>
To:     asml.silence@...il.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)

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