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authorXiubo Li <Li.Xiubo@freescale.com>2014-09-28 17:29:37 +0800
committerMark Brown <broonie@kernel.org>2014-09-28 11:49:42 +0100
commit6596aa047b624aeec2ea321962cfdecf9953a383 (patch)
treeb9173cd495e9f4a80c97d2094d4e1d2f2e2df327 /sound
parent7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9 (diff)
downloadlinux-6596aa047b624aeec2ea321962cfdecf9953a383.tar.gz
ASoC: core: fix possible ZERO_SIZE_PTR pointer dereferencing error.
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
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/soc-core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index d4bfd4a9076f..ae48f1013e80 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3203,7 +3203,7 @@ int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
unsigned int val, mask;
void *data;
- if (!component->regmap)
+ if (!component->regmap || !params->num_regs)
return -EINVAL;
len = params->num_regs * component->val_bytes;