Commit fe2dafa0 authored by Jason Wang's avatar Jason Wang Committed by Anthony Liguori
Browse files

virtio-net: only delete bh that existed 



We delete without check whether it existed during exit. This will lead NULL
pointer deference since it was created conditionally depends on guest driver
status and features. So add a check of existence before trying to delete it.

Cc: qemu-stable@nongnu.org
Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Message-id: 1383728288-28469-1-git-send-email-jasowang@redhat.com
Signed-off-by: default avatarAnthony Liguori <aliguori@amazon.com>
parent c2d30667

hw/net/virtio-net.c

+1 −1
Original line number Diff line number Diff line
@@ -1601,7 +1601,7 @@ static int virtio_net_device_exit(DeviceState *qdev) 
        if (q->tx_timer) {

            timer_del(q->tx_timer);

            timer_free(q->tx_timer);

        } else {

        } else if (q->tx_bh) {

            qemu_bh_delete(q->tx_bh);

        }

    }