linux-kernel - Re: [PATCH] ARM: davinci: DA8XX: fix oops in USB PHY driver due to stack allocated platform platform

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Message-ID: <77b0430f-3606-7195-6cde-eb90fc00c3fd@lechnology.com>
Date:   Thu, 15 Mar 2018 14:14:59 -0500
From:   David Lechner <david@...hnology.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Sekhar Nori <nsekhar@...com>, Kevin Hilman <khilman@...nel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: davinci: DA8XX: fix oops in USB PHY driver due to
 stack allocated platform platform_data

On 03/15/2018 01:02 PM, David Lechner wrote:
> This fixes a possible kernel oops due to using stack allocated platform
> data for the USB PHY driver on DA8XX devices. If the platform device
> probe is deferred, then we get a corrupt pointer for the platform data.
> 
> We now use a global static struct for the platform data so that the
> platform data pointer does not get written over.
> 
> Tested on OMAP-L138 LCDK board using legacy board file.
> 
> Fixes: 9b504750923cb ("ARM: davinci: da8xx: Add USB PHY platform device")
> Signed-off-by: David Lechner <david@...hnology.com>
> ---

superseded by v2 that applies cleanly before common clock series