Add some limits here so we don't corrupt memory.
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
diff --git a/drivers/staging/wilc1000/wilc_debugfs.c b/drivers/staging/wilc1000/wilc_debugfs.c
index 74b9fd5..c328208 100644
--- a/drivers/staging/wilc1000/wilc_debugfs.c
+++ b/drivers/staging/wilc1000/wilc_debugfs.c
@@ -53,6 +53,9 @@ static ssize_t wilc_debug_level_write(struct file *filp, const char *buf, size_t
char buffer[128] = {};
int flag = 0;
+ if (count > sizeof(buffer))
+ return -EINVAL;
+
if (copy_from_user(buffer, buf, count)) {
return -EFAULT;
}
@@ -99,6 +102,9 @@ static ssize_t wilc_debug_region_write(struct file *filp, const char *buf, size_
char buffer[128] = {};
int flag;
+ if (count > sizeof(buffer))
+ return -EINVAL;
+
if (copy_from_user(buffer, buf, count)) {
return -EFAULT;
}
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