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

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Date:   Mon, 11 Oct 2021 13:32:07 -0700
From:   syzbot <syzbot+bc2d90f602545761f287@...kaller.appspotmail.com>
To:     asml.silence@...il.com, axboe@...nel.dk, fgheet255t@...il.com,
        io-uring@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] WARNING in io_wq_submit_work (2)

syzbot suspects this issue was fixed by commit:

commit c57a91fb1ccfa203ba3e31e5a389cb04de5b0561
Author: Pavel Begunkov <asml.silence@...il.com>
Date:   Wed Sep 8 19:49:17 2021 +0000

    io_uring: fix missing mb() before waitqueue_active

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=143b46bf300000
start commit:   926de8c4326c Merge tag 'acpi-5.15-rc1-3' of git://git.kern..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=37df9ef5660a8387
dashboard link: https://syzkaller.appspot.com/bug?extid=bc2d90f602545761f287
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11e4357d300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1173a663300000

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

#syz fix: io_uring: fix missing mb() before waitqueue_active

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