linux-kernel - Re: [RESEND PATCH 2/4] usb: musb: Fix NULL check on struct musb

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Message-ID: <20201029145853.GK5639@atomide.com>
Date:   Thu, 29 Oct 2020 16:58:53 +0200
From:   Tony Lindgren <tony@...mide.com>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Bin Liu <b-liu@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>, od@...c.me,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Maarten ter Huurne <maarten@...ewalker.org>
Subject: Re: [RESEND PATCH 2/4] usb: musb: Fix NULL check on struct
 musb_request field

* Paul Cercueil <paul@...pouillou.net> [201027 16:42]:
> The 'request' variable is a pointer to the 'request' field of the
> struct musb_request 'req' pointer. It only worked until now because
> the 'request' field is the first one in the musb_request structure, but
> as soon as that changes, the check will be invalid.
> 
> Fix it preventively by doing the NULL-check on the 'req' pointer
> instead.

Acked-by: Tony Lindgren <tony@...mide.com>