Hello.
On 07/02/2018 10:32 PM, Alexander Aring wrote:
> This patch is necessary if case of AF_PACKET or other socket interface
> which I am aware of it and didn't allocated the necessary room.
>
> Reported-by: David Palma <david.palma@xxxxxxx>
> Reported-by: Rabi Narayan Sahoo <rabinarayans0828@xxxxxxxxx>
> Signed-off-by: Alexander Aring <aring@xxxxxxxxxxxx>
> ---
> net/mac802154/tx.c | 15 ++++++++++++++-
> 1 file changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c
> index 7e253455f9dd..bcd1a5e6ebf4 100644
> --- a/net/mac802154/tx.c
> +++ b/net/mac802154/tx.c
> @@ -63,8 +63,21 @@ ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
> int ret;
>
> if (!(local->hw.flags & IEEE802154_HW_TX_OMIT_CKSUM)) {
> - u16 crc = crc_ccitt(0, skb->data, skb->len);
> + struct sk_buff *nskb;
> + u16 crc;
> +
> + if (unlikely(skb_tailroom(skb) < IEEE802154_FCS_LEN)) {
> + nskb = skb_copy_expand(skb, 0, IEEE802154_FCS_LEN,
> + GFP_ATOMIC);
> + if (likely(nskb)) {
> + consume_skb(skb);
> + skb = nskb;
> + } else {
> + goto err_tx;
> + }
> + }
>
> + crc = crc_ccitt(0, skb->data, skb->len);
> put_unaligned_le16(crc, skb_put(skb, 2));
> }
>
>
This patch has been applied to the wpan-next tree and will be
part of the next pull request to net-next. Thanks!
I know you submitted this for wpan instead of wpan-next, but with rc8
being out I will not submit another pull request for 4.18. Instead I
added cc stable to the patch to make sure it gets picked into the stable
tree once 4.18 is out.
regards
Stefan Schmidt
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