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Date: Fri, 9 Aug 2013 11:44:06 +0200 From: Marc Kleine-Budde <mkl@...gutronix.de> To: netdev@...r.kernel.org Cc: kernel@...gutronix.de, linux-can@...r.kernel.org, davem@...emloft.net, Stephane Grosjean <s.grosjean@...k-system.com>, linux-stable <stable@...r.kernel.org>, Marc Kleine-Budde <mkl@...gutronix.de> Subject: [PATCH] can: pcan_usb: fix wrong memcpy() bytes length From: Stephane Grosjean <s.grosjean@...k-system.com> 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 <stable@...r.kernel.org> Signed-off-by: Stephane Grosjean <s.grosjean@...k-system.com> Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de> --- 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; } -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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