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-rw-r--r--drivers/input/ff-core.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/input/ff-core.c b/drivers/input/ff-core.c
index 3367f760d75a..480eb9d9876a 100644
--- a/drivers/input/ff-core.c
+++ b/drivers/input/ff-core.c
@@ -309,9 +309,10 @@ EXPORT_SYMBOL_GPL(input_ff_event);
* Once ff device is created you need to setup its upload, erase,
* playback and other handlers before registering input device
*/
-int input_ff_create(struct input_dev *dev, int max_effects)
+int input_ff_create(struct input_dev *dev, unsigned int max_effects)
{
struct ff_device *ff;
+ size_t ff_dev_size;
int i;
if (!max_effects) {
@@ -319,8 +320,12 @@ int input_ff_create(struct input_dev *dev, int max_effects)
return -EINVAL;
}
- ff = kzalloc(sizeof(struct ff_device) +
- max_effects * sizeof(struct file *), GFP_KERNEL);
+ ff_dev_size = sizeof(struct ff_device) +
+ max_effects * sizeof(struct file *);
+ if (ff_dev_size < max_effects) /* overflow */
+ return -EINVAL;
+
+ ff = kzalloc(ff_dev_size, GFP_KERNEL);
if (!ff)
return -ENOMEM;