linux-kernel - Re: [syzbot] WARNING in io_poll_double

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Message-ID: <00000000000053c98205cac53625@google.com>
Date:   Mon, 30 Aug 2021 04:34:12 -0700
From:   syzbot <syzbot+f2aca089e6f77e5acd46@...kaller.appspotmail.com>
To:     asml.silence@...il.com, axboe@...nel.dk, haoxu@...ux.alibaba.com,
        hdanton@...a.com, io-uring@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: [syzbot] WARNING in io_poll_double_wake

syzbot suspects this issue was fixed by commit:

commit a890d01e4ee016978776e45340e521b3bbbdf41f
Author: Hao Xu <haoxu@...ux.alibaba.com>
Date:   Wed Jul 28 03:03:22 2021 +0000

    io_uring: fix poll requests leaking second poll entries

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15d8819d300000
start commit:   98f7fdced2e0 Merge tag 'irq-urgent-2021-07-11' of git://gi..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=139b08f9b7481d26
dashboard link: https://syzkaller.appspot.com/bug?extid=f2aca089e6f77e5acd46
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11650180300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1510c6b0300000

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

#syz fix: io_uring: fix poll requests leaking second poll entries

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