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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	alsa-devel@alsa-project.org, kernel-janitors@vger.kernel.org
Subject: [patch] ALSA: pcm: harmless underflow issue in snd_pcm_sw_params()
Date: Tue, 13 Oct 2015 07:07:56 +0000	[thread overview]
Message-ID: <20151013070756.GA31537@mwanda> (raw)

"params->tstamp_mode" is a user supplied int.  We cap the maximum but
allow negative values by mistake.  It's harmless but static checkers
complain.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 75888dd..4863af5 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -650,7 +650,8 @@ static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 	}
 	snd_pcm_stream_unlock_irq(substream);
 
-	if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
+	if (params->tstamp_mode < 0 ||
+	    params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 		return -EINVAL;
 	if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
 	    params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)

             reply	other threads:[~2015-10-13  7:07 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-13  7:07 Dan Carpenter [this message]
2015-10-13  9:39 ` [patch] ALSA: pcm: harmless underflow issue in snd_pcm_sw_params() Takashi Iwai
2015-10-13 12:06   ` Dan Carpenter

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