linux-kernel - Re: [PATCH] CHROMIUM: acerhdf: fix bug when running on Qemu

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Message-ID: <20100506074155.21054qc65d3dfm2o@webmail.df.eu>
Date:	Thu, 06 May 2010 07:41:55 +0200
From:	peter@...e.net
To:	Rahul Chaturvedi <rkc@...omium.org>
Cc:	linux-kernel@...r.kernel.org, msb@...omium.org
Subject: Re: [PATCH] CHROMIUM: acerhdf: fix bug when running on Qemu


Quoting Rahul Chaturvedi <rkc@...omium.org>:

> Driver didn't verify the pointers in which it got product information
> back from DMI; on QEMU one of the pointers came back null,
> which made the driver crash and subsequently caused a kernel panic.
>
> Signed-off-by: Rahul Chaturvedi <rkc@...omium.org>
> ---
>  drivers/platform/x86/acerhdf.c |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
> index 4d922e4..e8ee3b2 100644
> --- a/drivers/platform/x86/acerhdf.c
> +++ b/drivers/platform/x86/acerhdf.c
> @@ -500,6 +500,11 @@ static int acerhdf_check_hardware(void)
>  	product = dmi_get_system_info(DMI_PRODUCT_NAME);
>
>
> +	if (!vendor || !version || !product) {
> +		pr_err("error getting hardware information");
> +		return -EINVAL;
> +	}
> +
>  	pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER);
>
>  	if (force_bios[0]) {
> --
> 1.7.0.1
>
>

Acked-by: Peter Feuerer <peter@...e.net>


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