[PATCH v3 09/11] net: qrtr: Drop remote {NEW|DEL}_LOOKUP messages

[Mihai Moldovan <ionic@ionic.de>]

From: Denis Kenzior <denkenz@gmail.com>

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@gmail.com>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Andy Gross <agross@kernel.org>
Signed-off-by: Mihai Moldovan <ionic@ionic.de>

---

v3:
  - rebase against current master
  - Link to v2: https://msgid.link/ad089e97706b095063777f1eefe04d75cbb917f1.1752947108.git.ionic@ionic.de

v2:
  - rebase against current master
  - Link to v1: https://msgid.link/20241018181842.1368394-9-denkenz@gmail.com
---
 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 fa22a27ec5d2..e0123bbe0bb5 100644
--- a/net/qrtr/af_qrtr.c
+++ b/net/qrtr/af_qrtr.c
@@ -629,6 +629,11 @@ int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
 	if (!size || 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))
-- 
2.50.0