[PATCH 4.14 09/67] ALSA: pcm: potential uninitialized return values

[Greg Kroah-Hartman]

4.14-stable review patch.  If anyone has any objections, please let me know.

--

From: Dan Carpenter 

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 
Cc: 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman 

---
 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(>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(>mmap_count))

[PATCH 4.14 09/67] ALSA: pcm: potential uninitialized return values

[Greg Kroah-Hartman]

4.14-stable review patch.  If anyone has any objections, please let me know.

--

From: Dan Carpenter 

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 
Cc: 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman 

---
 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(>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(>mmap_count))