linux-kernel - Re: [PATCH 4.9.y 4.14.y] IB/mlx5: Fix leaking stack memory to userspace

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Message-ID: <20190812142316.GA12869@kroah.com>
Date:   Mon, 12 Aug 2019 16:23:16 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Alessio Balsini <balsini@...roid.com>
Cc:     stable@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com, Jason Gunthorpe <jgg@...lanox.com>,
        Leon Romanovsky <leonro@...lanox.com>
Subject: Re: [PATCH 4.9.y 4.14.y] IB/mlx5: Fix leaking stack memory to
 userspace

On Mon, Aug 12, 2019 at 11:55:03AM +0100, Alessio Balsini wrote:
> From: Jason Gunthorpe <jgg@...lanox.com>
> 
> commit 0625b4ba1a5d4703c7fb01c497bd6c156908af00 upstream.
> 
> mlx5_ib_create_qp_resp was never initialized and only the first 4 bytes
> were written.
> 
> Fixes: 41d902cb7c32 ("RDMA/mlx5: Fix definition of mlx5_ib_create_qp_resp")

This commit only showed up in the following kernel releases:
	4.17 4.18.7 4.19

so why is this "fix" commit needed in anything older than 4.17?

That's why I did not backport it to older kernels, as I do not think it
is needed there.  Do you?

thanks,

greg k-h