linux-kernel - Re: [PATCH v2] usb: gadget: mv_u3d: request

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Message-ID: <87k0kig6v2.fsf@kernel.org>
Date:   Wed, 18 Aug 2021 17:33:16 +0300
From:   Felipe Balbi <balbi@...nel.org>
To:     Nadezda Lutovinova <lutovinova@...ras.ru>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Johan Hovold <johan@...nel.org>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org,
        stable@...r.kernel.org
Subject: Re: [PATCH v2] usb: gadget: mv_u3d: request_irq() after
 initializing UDC


Nadezda Lutovinova <lutovinova@...ras.ru> writes:

> If IRQ occurs between calling  request_irq() and  mv_u3d_eps_init(),
> then null pointer dereference occurs since u3d->eps[] wasn't
> initialized yet but used in mv_u3d_nuke().
>
> The patch puts registration of the interrupt handler after
> initializing of neccesery data.
>
> Found by Linux Driver Verification project (linuxtesting.org).
>
> Fixes: 90fccb529d24 ("usb: gadget: Gadget directory cleanup - group UDC drivers")
> Signed-off-by: Nadezda Lutovinova <lutovinova@...ras.ru>

Thanks for updating so quickly:

Acked-by: Felipe Balbi <balbi@...nel.org>

-- 
balbi