Re: [Qemu-devel] [vhost-user BUG ?] QEMU process segfault when shutdown or reboot with vhost-user

[Marc-André Lureau]

Hi

On Tue, Nov 3, 2015 at 2:01 PM, zhanghailiang
<address@hidden> wrote:
> The corresponding codes where gdb reports error are: (We have added some
> codes in net.c)

Can you reproduce with unmodified qemu? Could you give instructions to do so?

> ssize_t qemu_deliver_packet(NetClientState *sender,
>                             unsigned flags,
>                             const uint8_t *data,
>                             size_t size,
>                             void *opaque)
> {
>     NetClientState *nc = opaque;
>     ssize_t ret;
>
>     if (nc->link_down) {
>         return size;
>     }
>
>     if (nc->receive_disabled) {
>         return 0;
>     }
>
>     if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
>         ret = nc->info->receive_raw(nc, data, size);
>     } else {
>         ret = nc->info->receive(nc, data, size);   ----> Here is 510 line
>     }
>
> I'm not quite familiar with vhost-user, but for vhost-user, these two
> callback functions seem to be always NULL,
> Why we can come here ?

You should not come here, vhost-user has nc->receive_disabled (it
changes in 2.5)

-- 
Marc-André Lureau