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authorDan Carpenter <dan.carpenter@oracle.com>2014-06-11 14:17:41 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-07-10 04:00:45 +0400
commitb86e1926be37c77deeb176466d98678feab04066 (patch)
tree45ef90e6c898522221deaa382034ef21a1f98183 /drivers/misc/vexpress-syscfg.c
parent8a26af30ff55bec82443e718e26efd6b3a8bba83 (diff)
downloadlinux-b86e1926be37c77deeb176466d98678feab04066.tar.xz
mfd: vexpress: fix error handling vexpress_syscfg_regmap_init()
This function should be returning an ERR_PTR() on failure instead of NULL. Also there is a use after free bug if regmap_init() fails because we free "func" and then dereference doing the return. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/vexpress-syscfg.c')
-rw-r--r--drivers/misc/vexpress-syscfg.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/misc/vexpress-syscfg.c b/drivers/misc/vexpress-syscfg.c
index 73068e50e56d..3250fc1df0aa 100644
--- a/drivers/misc/vexpress-syscfg.c
+++ b/drivers/misc/vexpress-syscfg.c
@@ -199,7 +199,7 @@ static struct regmap *vexpress_syscfg_regmap_init(struct device *dev,
func = kzalloc(sizeof(*func) + sizeof(*func->template) * num,
GFP_KERNEL);
if (!func)
- return NULL;
+ return ERR_PTR(-ENOMEM);
func->syscfg = syscfg;
func->num_templates = num;
@@ -231,10 +231,14 @@ static struct regmap *vexpress_syscfg_regmap_init(struct device *dev,
func->regmap = regmap_init(dev, NULL, func,
&vexpress_syscfg_regmap_config);
- if (IS_ERR(func->regmap))
+ if (IS_ERR(func->regmap)) {
+ void *err = func->regmap;
+
kfree(func);
- else
- list_add(&func->list, &syscfg->funcs);
+ return err;
+ }
+
+ list_add(&func->list, &syscfg->funcs);
return func->regmap;
}