From: Stephen Warren <swarren@nvidia.com>
Date: Fri, 6 Apr 2012 21:16:03 +0000 (-0600)
Subject: regmap: validate regmap_raw_read/write val_len
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=851960ba7cb38a6a108d102e4c8b0ab702972e22;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

regmap: validate regmap_raw_read/write val_len

val_len should be a multiple of val_bytes. If it's not, error out early.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 6b4a775b439b..ee4fea351220 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -595,6 +595,9 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
 {
 	int ret;
 
+	if (val_len % map->format.val_bytes)
+		return -EINVAL;
+
 	map->lock(map);
 
 	ret = _regmap_raw_write(map, reg, val, val_len);
@@ -753,6 +756,9 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
 	unsigned int v;
 	int ret, i;
 
+	if (val_len % map->format.val_bytes)
+		return -EINVAL;
+
 	map->lock(map);
 
 	if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||