patch 'ethdev: remove use of strncpy' has been queued to stable release 24.11.9

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 24.11.9

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 10/29/26. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/b1697136057c10f2bf722c2154f995c836bb9da4

Thanks.

Luca Boccassi

---
>From b1697136057c10f2bf722c2154f995c836bb9da4 Mon Sep 17 00:00:00 2001
From: Bruce Richardson <bruce.richardson at intel.com>
Date: Mon, 17 Aug 2026 14:42:40 +0100
Subject: [PATCH] ethdev: remove use of strncpy

[ upstream commit 9275f1a692159ff77432faf7f202deef1ee97671 ]

The use of strncpy is not generally recommended, so replace it in code
tokenizing the representor list. Since its use in the function is not
involving null-terminated strings (we know that copied block will
not involve a null value in it), we can replace strncpy with memcpy
rather than a string function. This keeps the original intent of the
code.

For extra safety, also add in an explicit bounds check on the length
value before doing the memcpy.

Fixes: 9a9eb104edf6 ("ethdev: parse multiple representor devargs")

Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko at oktetlabs.ru>
Reviewed-by: Chengwen Feng <fengchengwen at huawei.com>
---
 lib/ethdev/ethdev_driver.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/ethdev/ethdev_driver.c b/lib/ethdev/ethdev_driver.c
index d1d7653636a..3df37bf9313 100644
--- a/lib/ethdev/ethdev_driver.c
+++ b/lib/ethdev/ethdev_driver.c
@@ -555,10 +555,15 @@ eth_dev_tokenise_representor_list(char *p_val, struct rte_eth_devargs *eth_devar
 		return devargs;
 	}
 
+	/* len - 2 strips the outer '[' and ']'; guard against underflow and overflow */
+	if (len < 2 || (len - 2) >= BUFSIZ) {
+		RTE_ETHDEV_LOG_LINE(ERR, "Representor list too long or malformed: %s", p_val);
+		return -EINVAL;
+	}
 	memset(str, 0, BUFSIZ);
 	memset(da_val, 0, BUFSIZ);
 	/* Remove the exterior [] of the consolidated list */
-	strncpy(str, &p_val[1], len - 2);
+	memcpy(str, &p_val[1], len - 2);
 	while (1) {
 		if (str[i] == '\0') {
 			if (da_val[0] != '\0') {
-- 
2.47.3

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2026-10-27 11:43:55.781931546 +0000
+++ 0053-ethdev-remove-use-of-strncpy.patch	2026-10-27 11:43:53.562060934 +0000
@@ -1 +1 @@
-From 9275f1a692159ff77432faf7f202deef1ee97671 Mon Sep 17 00:00:00 2001
+From b1697136057c10f2bf722c2154f995c836bb9da4 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 9275f1a692159ff77432faf7f202deef1ee97671 ]
+
@@ -17 +18,0 @@
-Cc: stable at dpdk.org
@@ -27 +28 @@
-index eab5c15d12..e6f8d6fe85 100644
+index d1d7653636a..3df37bf9313 100644
@@ -30 +31 @@
-@@ -583,10 +583,15 @@ eth_dev_tokenise_representor_list(char *p_val, struct rte_eth_devargs *eth_devar
+@@ -555,10 +555,15 @@ eth_dev_tokenise_representor_list(char *p_val, struct rte_eth_devargs *eth_devar