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

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Message-ID: <0000000000000c120805c05452c0@google.com>
Date:   Mon, 19 Apr 2021 07:41:09 -0700
From:   syzbot <syzbot+38769495e847cea2dcca@...kaller.appspotmail.com>
To:     asml.silence@...il.com, axboe@...nel.dk, ducheng2@...il.com,
        dvyukov@...gle.com, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org, mpe@...erman.id.au,
        paulmck@...nel.org, peterz@...radead.org, qais.yousef@....com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: Re: [syzbot] KASAN: use-after-free Read in __cpuhp_state_remove_instance

syzbot suspects this issue was fixed by commit:

commit 470ec4ed8c91b4db398ad607c700e9ce88365202
Author: Jens Axboe <axboe@...nel.dk>
Date:   Fri Feb 26 17:20:34 2021 +0000

    io-wq: fix double put of 'wq' in error path

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11e89cc5d00000
start commit:   cee407c5 Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=8f67201de02a572b
dashboard link: https://syzkaller.appspot.com/bug?extid=38769495e847cea2dcca
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=154e360ad00000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: io-wq: fix double put of 'wq' in error path

For information about bisection process see: https://goo.gl/tpsmEJ#bisection