Commit fb09c8c5 authored by David S. Miller's avatar David S. Miller

Merge tag 'linux-can-fixes-for-4.9-20161123' of...

Merge tag 'linux-can-fixes-for-4.9-20161123' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2016-11-23

this is a pull request for net/master.

The patch by Oliver Hartkopp for the broadcast manager (bcm) fixes the
CAN-FD support, which may cause an out-of-bounds access otherwise.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents f7db0ec9 5499a6b2
......@@ -77,7 +77,7 @@
(CAN_EFF_MASK | CAN_EFF_FLAG | CAN_RTR_FLAG) : \
(CAN_SFF_MASK | CAN_EFF_FLAG | CAN_RTR_FLAG))
#define CAN_BCM_VERSION "20160617"
#define CAN_BCM_VERSION "20161123"
MODULE_DESCRIPTION("PF_CAN broadcast manager protocol");
MODULE_LICENSE("Dual BSD/GPL");
......@@ -109,8 +109,9 @@ struct bcm_op {
u32 count;
u32 nframes;
u32 currframe;
struct canfd_frame *frames;
struct canfd_frame *last_frames;
/* void pointers to arrays of struct can[fd]_frame */
void *frames;
void *last_frames;
struct canfd_frame sframe;
struct canfd_frame last_sframe;
struct sock *sk;
......@@ -681,7 +682,7 @@ static void bcm_rx_handler(struct sk_buff *skb, void *data)
if (op->flags & RX_FILTER_ID) {
/* the easiest case */
bcm_rx_update_and_send(op, &op->last_frames[0], rxframe);
bcm_rx_update_and_send(op, op->last_frames, rxframe);
goto rx_starttimer;
}
......@@ -1068,7 +1069,7 @@ static int bcm_rx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
if (msg_head->nframes) {
/* update CAN frames content */
err = memcpy_from_msg((u8 *)op->frames, msg,
err = memcpy_from_msg(op->frames, msg,
msg_head->nframes * op->cfsiz);
if (err < 0)
return err;
......@@ -1118,7 +1119,7 @@ static int bcm_rx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
}
if (msg_head->nframes) {
err = memcpy_from_msg((u8 *)op->frames, msg,
err = memcpy_from_msg(op->frames, msg,
msg_head->nframes * op->cfsiz);
if (err < 0) {
if (op->frames != &op->sframe)
......@@ -1163,6 +1164,7 @@ static int bcm_rx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
/* check flags */
if (op->flags & RX_RTR_FRAME) {
struct canfd_frame *frame0 = op->frames;
/* no timers in RTR-mode */
hrtimer_cancel(&op->thrtimer);
......@@ -1174,8 +1176,8 @@ static int bcm_rx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
* prevent a full-load-loopback-test ... ;-]
*/
if ((op->flags & TX_CP_CAN_ID) ||
(op->frames[0].can_id == op->can_id))
op->frames[0].can_id = op->can_id & ~CAN_RTR_FLAG;
(frame0->can_id == op->can_id))
frame0->can_id = op->can_id & ~CAN_RTR_FLAG;
} else {
if (op->flags & SETTIMER) {
......
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