From: Pavel Machek <pavel@ucw.cz>
To: Marek Behun <kabel@blackhole.sk>
Cc: ultracoolguy@tutanota.com, Dmurphy <dmurphy@ti.com>,
Linux Leds <linux-leds@vger.kernel.org>,
Trivial <trivial@kernel.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] leds: lm3697: Fix out-of-bound access
Date: Mon, 5 Oct 2020 15:50:46 +0200 [thread overview]
Message-ID: <20201005135046.GA26765@duo.ucw.cz> (raw)
In-Reply-To: <20201005141334.36d9441a@blackhole.sk>
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Hi!
> > if (ret)
> > dev_err(&priv->client->dev, "Cannot write OUTPUT config\n");
> >
> > - for (i = 0; i < LM3697_MAX_CONTROL_BANKS; i++) {
> > + for (i = 0; i < priv->num_leds; i++) {
>
> Ultracoolguy is correct that this for cycle should not iterate
> LM3697_MAX_CONTROL_BANKS. Instead, the count check in lm3697_probe should be changed from
>
> if (!count)
> to
> if (!count || count > LM3697_MAX_CONTROL_BANKS)
>
> (the error message should also be changed, or maybe dropped, and the
> error code changed from -ENODEV to -EINVAL, if we use || operator).
I guess Dan (or someone else?) can submit simple one-liner I could
apply into -for-next (and maybe stable), and then we can sort the
naming etc in the driver? Gettings banks vs. LEDs right would be nice.
Thanks and best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next prev parent reply other threads:[~2020-10-05 13:50 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-03 13:02 [PATCH] leds: lm3697: Fix out-of-bound access ultracoolguy
2020-10-03 13:56 ` Pavel Machek
2020-10-03 14:43 ` ultracoolguy
2020-10-05 12:13 ` Marek Behun
2020-10-05 13:50 ` Pavel Machek [this message]
2020-10-05 13:57 ` ultracoolguy
2020-10-05 14:33 ` Dan Murphy
2020-10-05 14:37 ` Dan Murphy
2020-10-05 14:38 ` ultracoolguy
2020-10-05 14:41 ` Dan Murphy
2020-10-05 15:35 ` ultracoolguy
2020-10-05 16:05 ` Pavel Machek
2020-10-05 16:48 ` Alexander Dahl
2020-10-05 17:14 ` ultracoolguy
2020-10-05 17:32 ` Pavel Machek
2020-10-05 18:29 ` ultracoolguy
2020-10-05 18:31 ` ultracoolguy
2020-10-05 18:39 ` Pavel Machek
2020-10-05 18:48 ` ultracoolguy
2020-10-06 7:33 ` Marek Behun
2020-10-06 11:59 ` ultracoolguy
2020-10-06 12:21 ` Dan Murphy
2020-10-06 14:41 ` Marek Behun
2020-10-06 14:57 ` Dan Murphy
2020-10-06 15:14 ` Marek Behun
2020-10-06 17:26 ` Pavel Machek
2020-10-05 15:59 ` Pavel Machek
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