[PATCH v5 09/11] net: qrtr: Drop remote {NEW|DEL}_LOOKUP messages

[Mihai Moldovan]

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>

---
v5:
  - no changes
  - Link to v4: https://msgid.link/1ebb6174fcc0e7068f7f695470dc1d380f540377.1753720935.git.ionic@xxxxxxxx

v4:
  - no changes
  - Link to v3: https://msgid.link/05625051f520eb1aa091f422a745d048d5c8112e.1753313000.git.ionic@xxxxxxxx

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

v2:
  - rebase against current master
  - Link to v1: https://msgid.link/20241018181842.1368394-9-denkenz@xxxxxxxxx
---
 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 a7ab445416e4..fb89ef14cecc 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