linux-kernel - Re: [PATCH] ALSA: hda/realtek - Fix mem leak (and rid us of trailing whitespace).

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Date:	Fri, 13 Apr 2012 07:38:10 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Jesper Juhl <jj@...osbits.net>
Cc:	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	Jaroslav Kysela <perex@...ex.cz>,
	David Henningsson <david.henningsson@...onical.com>,
	Kailang Yang <kailang@...ltek.com.tw>,
	PeiSen Hou <pshou@...ltek.com.tw>,
	Jonathan Woithe <jwoithe@...sics.adelaide.edu.au>
Subject: Re: [PATCH] ALSA: hda/realtek - Fix mem leak (and rid us of trailing whitespace).

At Thu, 12 Apr 2012 22:11:25 +0200 (CEST),
Jesper Juhl wrote:
> 
> In sound/pci/hda/patch_realtek.c::alc_auto_fill_dac_nids(), in the
> 'for (;;)' loop, if the 'badness' value returned from
> fill_and_eval_dacs() is negative, then we'll return from the function
> without freeing the memory we allocated for 'best_cfg', thus leaking.
> Fix the leak by kfree()'ing the memory when badness is negative.
> 
> While I was there I also noticed some trailing whitespace in the
> function that I removed (along with all other trailing whitespace in
> the file) - it didn't seem worth-while to do that as two patches, so I
> hope it's OK that I just did it all as one patch.
> 
> Signed-off-by: Jesper Juhl <jj@...osbits.net>

Thanks, applied now.


Takashi

> ---
>  sound/pci/hda/patch_realtek.c |   16 +++++++++-------
>  1 file changed, 9 insertions(+), 7 deletions(-)
> 
> diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
> index 9917e55..c5e1a1a 100644
> --- a/sound/pci/hda/patch_realtek.c
> +++ b/sound/pci/hda/patch_realtek.c
> @@ -3398,8 +3398,10 @@ static int alc_auto_fill_dac_nids(struct hda_codec *codec)
>  	for (;;) {
>  		badness = fill_and_eval_dacs(codec, fill_hardwired,
>  					     fill_mio_first);
> -		if (badness < 0)
> +		if (badness < 0) {
> +			kfree(best_cfg);
>  			return badness;
> +		}
>  		debug_badness("==> lo_type=%d, wired=%d, mio=%d, badness=0x%x\n",
>  			      cfg->line_out_type, fill_hardwired, fill_mio_first,
>  			      badness);
> @@ -3434,7 +3436,7 @@ static int alc_auto_fill_dac_nids(struct hda_codec *codec)
>  			cfg->line_out_type = AUTO_PIN_SPEAKER_OUT;
>  			fill_hardwired = true;
>  			continue;
> -		} 
> +		}
>  		if (cfg->hp_outs > 0 &&
>  		    cfg->line_out_type == AUTO_PIN_SPEAKER_OUT) {
>  			cfg->speaker_outs = cfg->line_outs;
> @@ -3448,7 +3450,7 @@ static int alc_auto_fill_dac_nids(struct hda_codec *codec)
>  			cfg->line_out_type = AUTO_PIN_HP_OUT;
>  			fill_hardwired = true;
>  			continue;
> -		} 
> +		}
>  		break;
>  	}
>  
> @@ -4423,7 +4425,7 @@ static int alc_parse_auto_config(struct hda_codec *codec,
>  static int alc880_parse_auto_config(struct hda_codec *codec)
>  {
>  	static const hda_nid_t alc880_ignore[] = { 0x1d, 0 };
> -	static const hda_nid_t alc880_ssids[] = { 0x15, 0x1b, 0x14, 0 }; 
> +	static const hda_nid_t alc880_ssids[] = { 0x15, 0x1b, 0x14, 0 };
>  	return alc_parse_auto_config(codec, alc880_ignore, alc880_ssids);
>  }
>  
> @@ -6079,7 +6081,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
>  	 * Basically the device should work as is without the fixup table.
>  	 * If BIOS doesn't give a proper info, enable the corresponding
>  	 * fixup entry.
> -	 */ 
> +	 */
>  	SND_PCI_QUIRK(0x1043, 0x8330, "ASUS Eeepc P703 P900A",
>  		      ALC269_FIXUP_AMIC),
>  	SND_PCI_QUIRK(0x1043, 0x1013, "ASUS N61Da", ALC269_FIXUP_AMIC),
> @@ -6296,7 +6298,7 @@ static void alc_fixup_no_jack_detect(struct hda_codec *codec,
>  {
>  	if (action == ALC_FIXUP_ACT_PRE_PROBE)
>  		codec->no_jack_detect = 1;
> -}	
> +}
>  
>  static const struct alc_fixup alc861_fixups[] = {
>  	[ALC861_FIXUP_FSC_AMILO_PI1505] = {
> @@ -6714,7 +6716,7 @@ static const struct snd_pci_quirk alc662_fixup_tbl[] = {
>  	 * Basically the device should work as is without the fixup table.
>  	 * If BIOS doesn't give a proper info, enable the corresponding
>  	 * fixup entry.
> -	 */ 
> +	 */
>  	SND_PCI_QUIRK(0x1043, 0x1000, "ASUS N50Vm", ALC662_FIXUP_ASUS_MODE1),
>  	SND_PCI_QUIRK(0x1043, 0x1092, "ASUS NB", ALC662_FIXUP_ASUS_MODE3),
>  	SND_PCI_QUIRK(0x1043, 0x1173, "ASUS K73Jn", ALC662_FIXUP_ASUS_MODE1),
> -- 
> 1.7.10
> 
> 
> -- 
> Jesper Juhl <jj@...osbits.net>       http://www.chaosbits.net/
> Don't top-post http://www.catb.org/jargon/html/T/top-post.html
> Plain text mails only, please.
> 
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