From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20130911042925.126466206@goodmis.org> Date: Wed, 11 Sep 2013 00:30:25 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Stephane Grosjean , Marc Kleine-Budde , "David S. Miller" Subject: [198/251] can: pcan_usb: fix wrong memcpy() bytes length References: <20130911042707.738353451@goodmis.org> Content-Disposition: inline; filename=0198-can-pcan_usb-fix-wrong-memcpy-bytes-length.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.6.11.9-rc1 stable review patch. If anyone has any objections, please let me know. ------------------ From: Stephane Grosjean [ Upstream commit 3c322a56b01695df15c70bfdc2d02e0ccd80654e ] Fix possibly wrong memcpy() bytes length since some CAN records received from PCAN-USB could define a DLC field in range [9..15]. In that case, the real DLC value MUST be used to move forward the record pointer but, only 8 bytes max. MUST be copied into the data field of the struct can_frame object of the skb given to the network core. Cc: linux-stable Signed-off-by: Stephane Grosjean Signed-off-by: Marc Kleine-Budde Signed-off-by: David S. Miller Signed-off-by: Steven Rostedt --- drivers/net/can/usb/peak_usb/pcan_usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/can/usb/peak_usb/pcan_usb.c b/drivers/net/can/usb/peak_usb/pcan_usb.c index 25723d8..925ab8e 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb.c @@ -649,7 +649,7 @@ static int pcan_usb_decode_data(struct pcan_usb_msg_context *mc, u8 status_len) if ((mc->ptr + rec_len) > mc->end) goto decode_failed; - memcpy(cf->data, mc->ptr, rec_len); + memcpy(cf->data, mc->ptr, cf->can_dlc); mc->ptr += rec_len; } -- 1.7.10.4