linux-kernel - [PATCH] Don't leak in sound/core/oss/pcm_oss.c::snd_pcm_hw_param

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Date:	Thu, 6 Jan 2011 22:19:47 +0100 (CET)
From:	Jesper Juhl <jj@...osbits.net>
To:	alsa-devel@...a-project.org
cc:	linux-kernel@...r.kernel.org, Takashi Iwai <tiwai@...e.de>,
	Jaroslav Kysela <perex@...ex.cz>
Subject: [PATCH] Don't leak in
 sound/core/oss/pcm_oss.c::snd_pcm_hw_param_near()


snd_pcm_hw_param_near() will leak the memory allocated to 'save' if the 
call to snd_pcm_hw_param_max() returns less than zero.
This patch makes sure we never leak.

Signed-off-by: Jesper Juhl <jj@...osbits.net>
---
 pcm_oss.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index b753ec6..a2e4eb3 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -453,8 +453,10 @@ static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
 	} else {
 		*params = *save;
 		max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
-		if (max < 0)
+		if (max < 0) {
+			kfree(save);
 			return max;
+		}
 		last = 1;
 	}
  _end:



-- 
Jesper Juhl <jj@...osbits.net>            http://www.chaosbits.net/
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please.

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