> -----Original Message-----
> From: Olaf Hering [mailto:o...@aepfle.de]
> Sent: Tuesday, March 26, 2013 11:28 AM
> To: KY Srinivasan; gre...@linuxfoundation.org
> Cc: linux-kernel@vger.kernel.org; Olaf Hering
> Subject: [PATCH 2/3] tools: hv: fix checks for origin of netlink message in
> hv_vss_daemon
>
> Similar to what commit 95a69adab9acfc3981c504737a2b6578e4d846ef ("tools:
> hv: Netlink source address validation allows DoS") does in
> hv_kvp_daemon, improve checks for origin of netlink connector message.
>
> Signed-off-by: Olaf Hering <o...@aepfle.de>
Acked by: K. Y. Srinivasan <k...@microsoft.com>
> ---
> tools/hv/hv_vss_daemon.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c
> index 2a03d0b..dc3eb1e 100644
> --- a/tools/hv/hv_vss_daemon.c
> +++ b/tools/hv/hv_vss_daemon.c
> @@ -186,13 +186,19 @@ int main(void)
> len = recvfrom(fd, vss_recv_buffer, sizeof(vss_recv_buffer), 0,
> addr_p, &addr_l);
>
> - if (len < 0 || addr.nl_pid) {
> + if (len < 0) {
> syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
> addr.nl_pid, errno, strerror(errno));
> close(fd);
> return -1;
> }
>
> + if (addr.nl_pid) {
> + syslog(LOG_WARNING, "Received packet from untrusted
> pid:%u",
> + addr.nl_pid);
> + continue;
> + }
> +
> incoming_msg = (struct nlmsghdr *)vss_recv_buffer;
>
> if (incoming_msg->nlmsg_type != NLMSG_DONE)
>
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