[PATCH v6 10/15] net: qrtr: Drop remote {NEW|DEL}_LOOKUP messages

[Juha-Matti Tilli]

From: Denis Kenzior <denkenz@xxxxxxxxx>

These messages are explicitly filtered out by the in-kernel name
service (ns.c).  Filter them out even earlier to save some CPU cycles.

Signed-off-by: Denis Kenzior <denkenz@xxxxxxxxx>
Reviewed-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Reviewed-by: Andy Gross <agross@xxxxxxxxxx>
Signed-off-by: Mihai Moldovan <ionic@xxxxxxxx>
Signed-off-by: Juha-Matti Tilli <juha-matti.tilli@xxxxxx>
---
 net/qrtr/af_qrtr.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/qrtr/af_qrtr.c b/net/qrtr/af_qrtr.c
index ccfa3ed33a996..c139786c56f39 100644
--- a/net/qrtr/af_qrtr.c
+++ b/net/qrtr/af_qrtr.c
@@ -621,6 +621,11 @@ int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
 	if (!size || size > len || len != ALIGN(size, 4) + hdrlen)
 		goto err;
 
+	/* Don't allow remote lookups */
+	if (cb->type == QRTR_TYPE_NEW_LOOKUP ||
+	    cb->type == QRTR_TYPE_DEL_LOOKUP)
+		goto err;
+
 	if ((cb->type == QRTR_TYPE_NEW_SERVER ||
 	     cb->type == QRTR_TYPE_RESUME_TX) &&
 	    size < sizeof(struct qrtr_ctrl_pkt))
-- 
2.34.1