Denis V. Lunev wrote:
> netlink_kernel_create can be called with NULL as an input callback in several
> places, f.e. in kobject_uevent_init. This means that if one sends packet from
> user to kernel for such a socket, the packet will be leaked in the socket
> queue forever.
>
> This patch adds a simple generic cleanup callback for these sockets.
This should already be handled by netlink_getsockbypid:
/* Don't bother queuing skb if kernel socket has no input
function */
nlk = nlk_sk(sock);
if ((nlk->pid == 0 && !nlk->data_ready) ||
(sock->sk_state == NETLINK_CONNECTED &&
nlk->dst_pid != nlk_sk(ssk)->pid)) {
sock_put(sock);
return ERR_PTR(-ECONNREFUSED);
}
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