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ASoC: core: fix possible ZERO_SIZE_PTR pointer dereferencing error.

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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.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
This commit is contained in:
Xiubo Li 2014-09-28 17:29:37 +08:00 committed by Mark Brown
parent 7d1311b93e
commit 6596aa047b
1 changed files with 1 additions and 1 deletions
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2
sound/soc/soc-core.c
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@ -3203,7 +3203,7 @@ 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;