3.13.11.10 -stable review patch. If anyone has any objections, please let me
know.
------------------
From: Xiubo Li <li.xi...@freescale.com>
commit d6b41cb06044a7d895db82bdd54f6e4219970510 upstream.
Since we cannot make sure the 'val_count' 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>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
drivers/base/regmap/regmap.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 1ac3c9a..ebe332c 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1529,6 +1529,9 @@ int regmap_bulk_write(struct regmap *map, unsigned int
reg, const void *val,
if (val_bytes == 1) {
wval = (void *)val;
} else {
+ if (!val_count)
+ return -EINVAL;
+
wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL);
if (!wval) {
ret = -ENOMEM;
--
1.9.1
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