linux-kernel - Re: INFO: task hung in __get

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Message-ID: <ca1e5916-73ee-6fc4-1d78-428691f7fc64@i-love.sakura.ne.jp>
Date:   Thu, 16 May 2019 21:17:14 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     Jan Kara <jack@...e.cz>
Cc:     Jens Axboe <axboe@...nel.dk>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        syzbot <syzbot+10007d66ca02b08f0e60@...kaller.appspotmail.com>,
        dvyukov@...gle.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        linux-block@...r.kernel.org
Subject: Re: INFO: task hung in __get_super

On 2019/05/16 20:48, Jan Kara wrote:
> OK, so non-racy fix was a bit more involved and I've ended up just
> upgrading the file reference to an exclusive one in loop_set_fd() instead
> of trying to hand-craft some locking solution. The result is attached and
> it passes blktests.

blkdev_get() has corresponding blkdev_put().
bdgrab() does not have corresponding bdput() ?