Commit 8f805204 authored by Xiubo Li's avatar Xiubo Li Committed by Greg Kroah-Hartman

ASoC: core: fix possible ZERO_SIZE_PTR pointer dereferencing error.

commit 6596aa04 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: default avatarXiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5b744c01
...@@ -3181,7 +3181,7 @@ int snd_soc_bytes_put(struct snd_kcontrol *kcontrol, ...@@ -3181,7 +3181,7 @@ int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
unsigned int val, mask; unsigned int val, mask;
void *data; void *data;
if (!component->regmap) if (!component->regmap || !params->num_regs)
return -EINVAL; return -EINVAL;
len = params->num_regs * component->val_bytes; len = params->num_regs * component->val_bytes;
......
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