diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index c88424a..14ad745 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -922,7 +922,7 @@ int tpm_open(struct inode *inode, struct file *file)
 
 	spin_unlock(&driver_lock);
 
-	chip->data_buffer = kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL);
+	chip->data_buffer = kzalloc(TPM_BUFSIZE, GFP_KERNEL);
 	if (chip->data_buffer == NULL) {
 		chip->num_opens--;
 		put_device(chip->dev);