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| author | Oliver Hartkopp <socketcan@hartkopp.net> | 2016-11-23 14:33:25 +0100 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2016-11-23 15:22:18 +0100 |
| commit | 5499a6b22e5508b921c447757685b0a5e40a07ed (patch) | |
| tree | 7beb90dee5e614fd6b29068b045f778eac11d7d1 /net/can | |
| parent | c9b8af1330198ae241cd545e1f040019010d44d9 (diff) | |
| download | linux-0-day-5499a6b22e5508b921c447757685b0a5e40a07ed.tar.gz linux-0-day-5499a6b22e5508b921c447757685b0a5e40a07ed.tar.xz | |
can: bcm: fix support for CAN FD frames
Since commit 6f3b911d5f29b98 ("can: bcm: add support for CAN FD frames") the
CAN broadcast manager supports CAN and CAN FD data frames.
As these data frames are embedded in struct can[fd]_frames which have a
different length the access to the provided array of CAN frames became
dependend of op->cfsiz. By using a struct canfd_frame pointer for the array of
CAN frames the new offset calculation based on op->cfsiz was accidently applied
to CAN FD frame element lengths.
This fix makes the pointer to the arrays of the different CAN frame types a
void pointer so that the offset calculation in bytes accesses the correct CAN
frame elements.
Reference: http://marc.info/?l=linux-netdev&m=147980658909653
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net/can')
| -rw-r--r-- | net/can/bcm.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/net/can/bcm.c b/net/can/bcm.c index 8af9d25ff988a..436a7537e6a9d 100644 --- a/net/can/bcm.c +++ b/net/can/bcm.c @@ -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) { |