linux-kernel - Re: [PATCH 08/10] oss: midi_synth: check get

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Message-ID: <s5h4ofitw8r.wl%tiwai@suse.de>
Date:	Thu, 29 Jul 2010 12:31:32 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Kulikov Vasiliy <segooon@...il.com>
Cc:	kernel-janitors@...r.kernel.org, Jaroslav Kysela <perex@...ex.cz>,
	Roel Kluin <roel.kluin@...il.com>, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/10] oss: midi_synth: check get_user() return value

At Wed, 28 Jul 2010 20:41:17 +0400,
Kulikov Vasiliy wrote:
> 
> get_user() may fail, if so return -EFAULT.
> 
> Signed-off-by: Kulikov Vasiliy <segooon@...il.com>

Applied now.  Thanks.


Takashi


> ---
>  sound/oss/midi_synth.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/sound/oss/midi_synth.c b/sound/oss/midi_synth.c
> index 3bc7104..3c09374 100644
> --- a/sound/oss/midi_synth.c
> +++ b/sound/oss/midi_synth.c
> @@ -523,7 +523,9 @@ midi_synth_load_patch(int dev, int format, const char __user *addr,
>  	{
>  		unsigned char   data;
>  
> -		get_user(*(unsigned char *) &data, (unsigned char __user *) &((addr)[hdr_size + i]));
> +		if (get_user(data,
> +		    (unsigned char __user *)(addr + hdr_size + i)))
> +			return -EFAULT;
>  
>  		eox_seen = (i > 0 && data & 0x80);	/* End of sysex */
>  
> -- 
> 1.7.0.4
> 
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