Hi Soenke, On Sun, Jul 24, 2022 at 11:53 PM Soenke Huster <soenke.huster@xxxxxxxxx> wrote: > > By using skb_put we ensure that skb->tail is set > correctly. Currently, skb->tail is always zero, which > leads to errors, such as the following page fault in > rfcomm_recv_frame: > > BUG: unable to handle page fault for address: ffffed1021de29ff > #PF: supervisor read access in kernel mode > #PF: error_code(0x0000) - not-present page > RIP: 0010:rfcomm_run+0x831/0x4040 (net/bluetooth/rfcomm/core.c:1751) Please add the Fixes tag with the original patch that introduced the problem. > Signed-off-by: Soenke Huster <soenke.huster@xxxxxxxxx> > --- > drivers/bluetooth/virtio_bt.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/bluetooth/virtio_bt.c b/drivers/bluetooth/virtio_bt.c > index 67c21263f9e0..fd281d439505 100644 > --- a/drivers/bluetooth/virtio_bt.c > +++ b/drivers/bluetooth/virtio_bt.c > @@ -219,7 +219,7 @@ static void virtbt_rx_work(struct work_struct *work) > if (!skb) > return; > > - skb->len = len; > + skb_put(skb, len); > virtbt_rx_handle(vbt, skb); > > if (virtbt_add_inbuf(vbt) < 0) > -- > 2.36.1 > -- Luiz Augusto von Dentz
