This is a note to let you know that I've just added the patch titled

ALSA: pcm: potential uninitialized return values

to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: alsa-pcm-potential-uninitialized-return-values.patch and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 5607dddbfca774fb38bffadcb077fe03aa4ac5c6 Mon Sep 17 00:00:00 2001

From: Dan Carpenter dan.carpenter@oracle.com Date: Tue, 27 Mar 2018 16:07:52 +0300 Subject: ALSA: pcm: potential uninitialized return values

From: Dan Carpenter dan.carpenter@oracle.com

commit 5607dddbfca774fb38bffadcb077fe03aa4ac5c6 upstream.

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 Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- sound/core/oss/pcm_oss.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/sound/core/oss/pcm_oss.c +++ b/sound/core/oss/pcm_oss.c @@ -1326,7 +1326,7 @@ static ssize_t snd_pcm_oss_write2(struct 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)) @@ -1433,7 +1433,7 @@ static ssize_t snd_pcm_oss_read2(struct 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))

Patches currently in stable-queue which might be from dan.carpenter@oracle.com are

queue-4.15/alsa-pcm-potential-uninitialized-return-values.patch