[alsa-devel] [patch 1/2] OSS: soundcard: locking bug in sound_ioctl()

[Takashi Iwai]

At Sun, 10 Oct 2010 19:33:52 +0200,
Dan Carpenter wrote:
> 
> We shouldn't return directly here because we're still holding the
> &soundcard_mutex.
> 
> This bug goes all the way back to the start of git.  It's strange that
> no one has complained about it as a runtime bug.
> 
> CC: stable at kernel.org
> Signed-off-by: Dan Carpenter <error27 at gmail.com>

Applied now.  Thanks.


Takashi


> diff --git a/sound/oss/soundcard.c b/sound/oss/soundcard.c
> index 938ed94..a5ab61e 100644
> --- a/sound/oss/soundcard.c
> +++ b/sound/oss/soundcard.c
> @@ -392,11 +392,11 @@ static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
>  	case SND_DEV_DSP:
>  	case SND_DEV_DSP16:
>  	case SND_DEV_AUDIO:
> -		return audio_ioctl(dev, file, cmd, p);
> +		ret = audio_ioctl(dev, file, cmd, p);
>  		break;
>  
>  	case SND_DEV_MIDIN:
> -		return MIDIbuf_ioctl(dev, file, cmd, p);
> +		ret = MIDIbuf_ioctl(dev, file, cmd, p);
>  		break;
>  
>  	}
>