linux-kernel - Re: [PATCH] kernfs: prevent early freeing of root node

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Message-ID: <YagEf//iqIAk/gEf@slm.duckdns.org>
Date:   Wed, 1 Dec 2021 13:25:51 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Minchan Kim <minchan@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH] kernfs: prevent early freeing of root node

On Wed, Dec 01, 2021 at 03:16:48PM -0800, Minchan Kim wrote:
...
> Since kernfs moves the kernfs_rwsem lock into root, it couldn't hold
> the lock when the root node is tearing down. Thus, get the refcount
> of root node.
> 
> Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Reported-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Signed-off-by: Minchan Kim <minchan@...nel.org>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun