tools: hv: daemon should check type of received Netlink msg

HyperV KVP daemon should check nlmsg_type in received netlink message
header. If message type is NLMSG_DONE daemon can proceed with processing
otherwise it should wait for next message.

Signed-off-by: Tomas Hozza <thozza@redhat.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index 704a0f9a063d..5a1f6489d185 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -1503,6 +1503,10 @@ int main(void)
                 }
 
                 incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
+
+                if (incoming_msg->nlmsg_type != NLMSG_DONE)
+                        continue;
+
                 incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
                 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;