From: "Bjørn Mork" <bjorn@mork.no>
To: Adam Lee <adam.lee@canonical.com>
Cc: linux-kernel@vger.kernel.org,
platform-driver-x86@vger.kernel.org,
ibm-acpi-devel@lists.sourceforge.net,
Matthew Garrett <matthew.garrett@nebula.com>,
Henrique de Moraes Holschuh <ibm-acpi@hmh.eng.br>,
Alex Hung <alex.hung@canonical.com>
Subject: Re: [PATCH 1/3] thinkpad_acpi: return -NODEV while operating uninitialized LEDs
Date: Fri, 07 Jun 2013 10:53:50 +0200 [thread overview]
Message-ID: <87vc5qxpwh.fsf@nemi.mork.no> (raw)
In-Reply-To: <1370593209-21358-2-git-send-email-adam.lee@canonical.com> (Adam Lee's message of "Fri, 7 Jun 2013 16:20:07 +0800")
Adam Lee <adam.lee@canonical.com> writes:
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -5401,9 +5401,12 @@ static int led_write(char *buf)
> return -ENODEV;
>
> while ((cmd = next_cmd(&buf))) {
> - if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
> + if (sscanf(cmd, "%d", &led) != 1)
> return -EINVAL;
>
> + if (!tpacpi_leds[led].led)
> + return -ENODEV;
This looks risky. Why did you remove the index sanity check? What will
happen now if the input is e.g "-1" or "42"?
BTW, the magic number 15 should probably be (TPACPI_LED_NUMLEDS - 1)
instead.
Bjørn
next prev parent reply other threads:[~2013-06-07 8:54 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-07 8:20 [PATCH 0/3] thinkpad_acpi: avoid ACPI Warning while operating non-exist LEDs Adam Lee
2013-06-07 8:20 ` [PATCH 1/3] thinkpad_acpi: return -NODEV while operating uninitialized LEDs Adam Lee
2013-06-07 8:53 ` Bjørn Mork [this message]
2013-06-07 8:59 ` Adam Lee
2013-06-18 0:12 ` Henrique de Moraes Holschuh
2013-06-18 0:18 ` Henrique de Moraes Holschuh
2013-06-07 8:20 ` [PATCH 2/3] thinkpad_acpi: add the ability setting TPACPI_LED_NONE by quirk Adam Lee
2013-06-18 0:19 ` Henrique de Moraes Holschuh
2013-06-07 8:20 ` [PATCH 3/3] thinkpad_acpi: add LED quirks of models which don't have EC controllable LEDs Adam Lee
2013-06-07 13:22 ` Matthew Garrett
2013-06-07 15:06 ` Adam Lee
2013-06-07 20:16 ` Henrique de Moraes Holschuh
2013-06-08 9:04 ` Adam Lee
2013-06-18 0:20 ` Henrique de Moraes Holschuh
2013-06-07 9:05 ` [PATCH v2] thinkpad_acpi: return -NODEV while operating uninitialized LEDs Adam Lee
2013-06-08 2:19 ` Amos Kong
2013-06-08 8:51 ` [PATCH 1/3 v3] " Adam Lee
2013-06-18 0:17 ` Henrique de Moraes Holschuh
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