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

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Message-ID: <05625051f520eb1aa091f422a745d048d5c8112e.1753313000.git.ionic@ionic.de>
Date: Thu, 24 Jul 2025 01:24:06 +0200
From: Mihai Moldovan <ionic@...ic.de>
To: linux-arm-msm@...r.kernel.org,
	Manivannan Sadhasivam <mani@...nel.org>
Cc: Denis Kenzior <denkenz@...il.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Kuniyuki Iwashima <kuniyu@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>,
	Willem de Bruijn <willemb@...gle.com>,
	"David S . Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>,
	Simon Horman <horms@...nel.org>,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH v3 09/11] net: qrtr: Drop remote {NEW|DEL}_LOOKUP messages

From: Denis Kenzior <denkenz@...il.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@...il.com>
Reviewed-by: Marcel Holtmann <marcel@...tmann.org>
Reviewed-by: Andy Gross <agross@...nel.org>
Signed-off-by: Mihai Moldovan <ionic@...ic.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