From: Xiubo Li <li.xi...@freescale.com>
3.4.105-rc1 review patch. If anyone has any objections, please let me know.
------------------
commit 6596aa047b624aeec2ea321962cfdecf9953a383 upstream.
Since we cannot make sure the 'params->num_regs' will always be none
zero here, and then if it equals to zero, the kmemdup() will return
ZERO_SIZE_PTR, which equals to ((void *)16).
So this patch fix this with just doing the zero check before calling
kmemdup().
Signed-off-by: Xiubo Li <li.xi...@freescale.com>
Signed-off-by: Mark Brown <broo...@kernel.org>
[lizf: Backported to 3.4: adjust context]
Signed-off-by: Zefan Li <lize...@huawei.com>
---
sound/soc/soc-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index c88d974..34c1fbb 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2799,7 +2799,7 @@ int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
unsigned int val;
void *data;
- if (!codec->using_regmap)
+ if (!codec->using_regmap || !params->num_regs)
return -EINVAL;
data = ucontrol->value.bytes.data;
--
1.9.1
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