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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: youngjun <her0gyugyu@gmail.com>
Cc: Tejun Heo <tj@kernel.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] kernfs: fix possibility of NULL pointer dereference.
Date: Mon, 27 Apr 2020 19:31:34 +0200	[thread overview]
Message-ID: <20200427173134.GC3936841@kroah.com> (raw)
In-Reply-To: <20200427164836.48765-1-her0gyugyu@gmail.com>

On Mon, Apr 27, 2020 at 09:48:36AM -0700, youngjun wrote:
> When dentry is negative, "kernfs_dentry_node" returns NULL.
> In this case, "kernfs_root" dereferences NULL pointer.
> 
> Signed-off-by: youngjun <her0gyugyu@gmail.com>
> ---
>  fs/kernfs/dir.c | 18 ++++++++++--------
>  1 file changed, 10 insertions(+), 8 deletions(-)

And how can this be triggered on a kernfs filesystem?

thanks,

greg k-h

      reply	other threads:[~2020-04-27 17:31 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-27 16:48 [PATCH] kernfs: fix possibility of NULL pointer dereference youngjun
2020-04-27 17:31 ` Greg Kroah-Hartman [this message]

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