linux-kernel - Re: [PATCH] soc: ux500: do not directly dereference _

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Message-ID: <Y2Jqb9n1jmLZRkXN@zx2c4.com>
Date:   Wed, 2 Nov 2022 14:02:39 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     linus.walleij@...aro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, arnd@...db.de
Cc:     stable@...r.kernel.org, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] soc: ux500: do not directly dereference __iomem

CC+ Arnd

On Sun, Oct 30, 2022 at 11:30:46PM +0100, Jason A. Donenfeld wrote:
> Hi Linus,
> 
> On Sun, Oct 23, 2022 at 9:57 PM Jason A. Donenfeld <Jason@...c4.com> wrote:
> >
> > Sparse reports that calling add_device_randomness() on `uid` is a
> > violation of address spaces. And indeed the next usage uses readl()
> > properly, but that was left out when passing it toadd_device_
> > randomness(). So instead copy the whole thing to the stack first.
> >
> > Fixes: 4040d10a3d44 ("ARM: ux500: add DB serial number to entropy pool")
> > Cc: Linus Walleij <linus.walleij@...aro.org>
> > Cc: stable@...r.kernel.org
> > Link: https://lore.kernel.org/all/202210230819.loF90KDh-lkp@intel.com/
> > Reported-by: kernel test robot <lkp@...el.com>
> > Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
> 
> Just thought I'd follow up on this.