[PATCH v2 RESEND] Bluetooth: virtio_bt: Use skb_put to set length

From: Soenke Huster
Date: Wed Oct 12 2022 - 03:52:19 EST

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

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)

Fixes: afd2daa26c7a ("Bluetooth: Add support for virtio transport driver")
Signed-off-by: Soenke Huster <soenke.huster@xxxxxxxxx>
v2: Add Fixes tag
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)

- skb->len = len;
+ skb_put(skb, len);
virtbt_rx_handle(vbt, skb);

if (virtbt_add_inbuf(vbt) < 0)