linux-kernel - Re: [PATCH AUTOSEL 4.4 44/56] video: imsttfb: fix potential NULL pointer dereferences

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Message-ID: <20190601161929.GA5028@kroah.com>
Date:   Sat, 1 Jun 2019 09:19:29 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Kangjie Lu <kjlu@....edu>, Aditya Pakki <pakki001@....edu>,
        Finn Thain <fthain@...egraphics.com.au>,
        Rob Herring <robh@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH AUTOSEL 4.4 44/56] video: imsttfb: fix potential NULL
 pointer dereferences

On Sat, Jun 01, 2019 at 09:25:48AM -0400, Sasha Levin wrote:
> From: Kangjie Lu <kjlu@....edu>
> 
> [ Upstream commit 1d84353d205a953e2381044953b7fa31c8c9702d ]
> 
> In case ioremap fails, the fix releases resources and returns
> -ENOMEM to avoid NULL pointer dereferences.
> 
> Signed-off-by: Kangjie Lu <kjlu@....edu>
> Cc: Aditya Pakki <pakki001@....edu>
> Cc: Finn Thain <fthain@...egraphics.com.au>
> Cc: Rob Herring <robh@...nel.org>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> [b.zolnierkie: minor patch summary fixup]
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
> Signed-off-by: Sasha Levin <sashal@...nel.org>
> ---
>  drivers/video/fbdev/imsttfb.c | 5 +++++
>  1 file changed, 5 insertions(+)

Why only 4.4.y?  Shouldn't this be queued up for everything or none?

thanks,

greg k-h