skb passed to network layer contains incorrect length.
In mux aggregation protocol, the datagram block received
from device contains block signature, packet & datagram
header. The right skb len to be calculated by subracting
datagram pad len from datagram length.
Whereas in mux lite protocol, the skb contains single
datagram so skb len is calculated by subtracting the
packet offset from datagram header.
Fixes:
1f52d7b62285 ("net: wwan: iosm: Enable M.2 7360 WWAN card support")
Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
/* Pass the DL packet to the netif layer. */
static int ipc_mux_net_receive(struct iosm_mux *ipc_mux, int if_id,
struct iosm_wwan *wwan, u32 offset,
/* Pass the DL packet to the netif layer. */
static int ipc_mux_net_receive(struct iosm_mux *ipc_mux, int if_id,
struct iosm_wwan *wwan, u32 offset,
- u8 service_class, struct sk_buff *skb)
+ u8 service_class, struct sk_buff *skb,
+ u32 pkt_len)
{
struct sk_buff *dest_skb = skb_clone(skb, GFP_ATOMIC);
{
struct sk_buff *dest_skb = skb_clone(skb, GFP_ATOMIC);
return -ENOMEM;
skb_pull(dest_skb, offset);
return -ENOMEM;
skb_pull(dest_skb, offset);
- skb_set_tail_pointer(dest_skb, dest_skb->len);
+ skb_trim(dest_skb, pkt_len);
/* Pass the packet to the netif layer. */
dest_skb->priority = service_class;
/* Pass the packet to the netif layer. */
dest_skb->priority = service_class;
static void ipc_mux_dl_adgh_decode(struct iosm_mux *ipc_mux,
struct sk_buff *skb)
{
static void ipc_mux_dl_adgh_decode(struct iosm_mux *ipc_mux,
struct sk_buff *skb)
{
- u32 pad_len, packet_offset;
+ u32 pad_len, packet_offset, adgh_len;
struct iosm_wwan *wwan;
struct mux_adgh *adgh;
u8 *block = skb->data;
struct iosm_wwan *wwan;
struct mux_adgh *adgh;
u8 *block = skb->data;
packet_offset = sizeof(*adgh) + pad_len;
if_id += ipc_mux->wwan_q_offset;
packet_offset = sizeof(*adgh) + pad_len;
if_id += ipc_mux->wwan_q_offset;
+ adgh_len = le16_to_cpu(adgh->length);
/* Pass the packet to the netif layer */
rc = ipc_mux_net_receive(ipc_mux, if_id, wwan, packet_offset,
/* Pass the packet to the netif layer */
rc = ipc_mux_net_receive(ipc_mux, if_id, wwan, packet_offset,
- adgh->service_class, skb);
+ adgh->service_class, skb,
+ adgh_len - packet_offset);
if (rc) {
dev_err(ipc_mux->dev, "mux adgh decoding error");
return;
if (rc) {
dev_err(ipc_mux->dev, "mux adgh decoding error");
return;
int if_id, int nr_of_dg)
{
u32 dl_head_pad_len = ipc_mux->session[if_id].dl_head_pad_len;
int if_id, int nr_of_dg)
{
u32 dl_head_pad_len = ipc_mux->session[if_id].dl_head_pad_len;
- u32 packet_offset, i, rc;
+ u32 packet_offset, i, rc, dg_len;
for (i = 0; i < nr_of_dg; i++, dg++) {
if (le32_to_cpu(dg->datagram_index)
for (i = 0; i < nr_of_dg; i++, dg++) {
if (le32_to_cpu(dg->datagram_index)
packet_offset =
le32_to_cpu(dg->datagram_index) +
dl_head_pad_len;
packet_offset =
le32_to_cpu(dg->datagram_index) +
dl_head_pad_len;
+ dg_len = le16_to_cpu(dg->datagram_length);
/* Pass the packet to the netif layer. */
rc = ipc_mux_net_receive(ipc_mux, if_id, ipc_mux->wwan,
packet_offset,
/* Pass the packet to the netif layer. */
rc = ipc_mux_net_receive(ipc_mux, if_id, ipc_mux->wwan,
packet_offset,
- dg->service_class,
- skb);
+ dg->service_class, skb,
+ dg_len - dl_head_pad_len);