From: Dan Carpenter <dan.carpenter@oracle.com>
To: Takashi Iwai <tiwai@suse.com>
Cc: Jaroslav Kysela <perex@perex.cz>,
Takashi Sakamoto <o-takashi@sakamocchi.jp>,
alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [PATCH] ALSA: pcm: potential uninitialized return values
Date: Tue, 27 Mar 2018 16:07:52 +0300 [thread overview]
Message-ID: <20180327130752.GA31841@mwanda> (raw)
Smatch complains that "tmp" can be uninitialized if we do a zero size
write.
Fixes: 02a5d6925cd3 ("ALSA: pcm: Avoid potential races between OSS ioctls and read/write")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index a9082f219561..40852c595453 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -1364,7 +1364,7 @@ static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const cha
static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
{
size_t xfer = 0;
- ssize_t tmp;
+ ssize_t tmp = 0;
struct snd_pcm_runtime *runtime = substream->runtime;
if (atomic_read(&substream->mmap_count))
@@ -1474,7 +1474,7 @@ static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf,
static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
{
size_t xfer = 0;
- ssize_t tmp;
+ ssize_t tmp = 0;
struct snd_pcm_runtime *runtime = substream->runtime;
if (atomic_read(&substream->mmap_count))
next reply other threads:[~2018-03-27 13:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-27 13:07 Dan Carpenter [this message]
2018-03-27 13:21 ` [PATCH] ALSA: pcm: potential uninitialized return values Takashi Iwai
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