[PATCH 4.9 031/103] can: peak_usb: pcan_usb_pro: Fix info-leaks to USB devices

[Greg Kroah-Hartman]

From: Tomas Bortoli <tomasbortoli@xxxxxxxxx>

commit ead16e53c2f0ed946d82d4037c630e2f60f4ab69 upstream.

Uninitialized Kernel memory can leak to USB devices.

Fix by using kzalloc() instead of kmalloc() on the affected buffers.

Signed-off-by: Tomas Bortoli <tomasbortoli@xxxxxxxxx>
Reported-by: syzbot+d6a5a1a3657b596ef132@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: f14e22435a27 ("net: can: peak_usb: Do not do dma on the stack")
Cc: linux-stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/net/can/usb/peak_usb/pcan_usb_pro.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
@@ -500,7 +500,7 @@ static int pcan_usb_pro_drv_loaded(struc
 	u8 *buffer;
 	int err;
 
-	buffer = kmalloc(PCAN_USBPRO_FCT_DRVLD_REQ_LEN, GFP_KERNEL);
+	buffer = kzalloc(PCAN_USBPRO_FCT_DRVLD_REQ_LEN, GFP_KERNEL);
 	if (!buffer)
 		return -ENOMEM;