[PATCH 00/17] drivers: replace strncpy with strlcpy

[PATCH 00/17] drivers: replace strncpy with strlcpy

[Bruce Richardson]

Many uses of strncpy in DPDK drivers can be directly replaced by
a call to strlcpy instead, which is safer in that it always null-
terminates the string. This AI assisted patchset makes those
simple replacements, adjusting lengths as appropriate.

After this set, there are still a number of drivers with strncpy calls
in them, but those are not simple strncpy->strlcpy replacements, so
left for later rework.

Bruce Richardson (17):
  common/cnxk: replace strncpy with strlcpy
  common/mlx5: replace strncpy with strlcpy
  crypto/mvsam: replace strncpy with strlcpy
  crypto/scheduler: replace strncpy with strlcpy
  event/cnxk: replace strncpy with strlcpy
  net/ark: replace strncpy with strlcpy
  net/bnx2x: replace strncpy with strlcpy
  net/cnxk: replace strncpy with strlcpy
  net/dpaa: replace strncpy with strlcpy
  net/ionic: replace strncpy with strlcpy
  net/mlx4: replace strncpy with strlcpy
  net/mlx5: replace strncpy with strlcpy
  net/nfp: replace strncpy with strlcpy
  net/qede: replace strncpy with strlcpy
  net/softnic: replace strncpy with strlcpy
  net/vhost: replace strncpy with strlcpy
  net/virtio: replace strncpy with strlcpy

 drivers/common/cnxk/roc_model.c                   | 8 ++++----
 drivers/common/mlx5/linux/mlx5_common_os.c        | 2 +-
 drivers/crypto/mvsam/rte_mrvl_pmd.c               | 2 +-
 drivers/crypto/scheduler/scheduler_pmd.c          | 8 ++++----
 drivers/event/cnxk/cnxk_eventdev_stats.c          | 2 +-
 drivers/net/ark/ark_ethdev.c                      | 2 +-
 drivers/net/bnx2x/bnx2x.c                         | 2 +-
 drivers/net/bnx2x/bnx2x_vfpf.c                    | 2 +-
 drivers/net/cnxk/cnxk_eswitch.c                   | 4 ++--
 drivers/net/cnxk/cnxk_rep_msg.c                   | 2 +-
 drivers/net/dpaa/dpaa_ethdev.c                    | 2 +-
 drivers/net/ionic/ionic_main.c                    | 4 ++--
 drivers/net/mlx4/mlx4_ethdev.c                    | 2 +-
 drivers/net/mlx5/mlx5.c                           | 8 ++++----
 drivers/net/mlx5/windows/mlx5_ethdev_os.c         | 2 +-
 drivers/net/nfp/nfpcore/nfp_resource.c            | 2 +-
 drivers/net/qede/qede_ethdev.c                    | 2 +-
 drivers/net/softnic/conn.c                        | 4 ++--
 drivers/net/vhost/rte_eth_vhost.c                 | 2 +-
 drivers/net/virtio/virtio_user/vhost_kernel_tap.c | 2 +-
 20 files changed, 32 insertions(+), 32 deletions(-)

--
2.53.0

[PATCH 01/17] common/cnxk: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 014a9e222bac ("common/cnxk: add model init and IO handling API")
Fixes: b315581c66dc ("common/cnxk: skip probing SoC environment for CN9K")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/common/cnxk/roc_model.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/common/cnxk/roc_model.c b/drivers/common/cnxk/roc_model.c
index f0312a5400..ddd7ee8634 100644
--- a/drivers/common/cnxk/roc_model.c
+++ b/drivers/common/cnxk/roc_model.c
@@ -211,15 +211,15 @@ populate_model(struct roc_model *model, uint32_t midr)
 		if (model_db[i].impl == impl && model_db[i].part == part &&
 		    model_db[i].major == major && model_db[i].minor == minor) {
 			model->flag = model_db[i].flag;
-			strncpy(model->name, model_db[i].name,
-				ROC_MODEL_STR_LEN_MAX - 1);
+			strlcpy(model->name, model_db[i].name,
+				ROC_MODEL_STR_LEN_MAX);
 			found = true;
 			break;
 		}
 not_found:
 	if (!found) {
 		model->flag = 0;
-		strncpy(model->name, "unknown", ROC_MODEL_STR_LEN_MAX - 1);
+		strlcpy(model->name, "unknown", ROC_MODEL_STR_LEN_MAX);
 		plt_err("Invalid RoC model (impl=0x%x, part=0x%x, major=0x%x, minor=0x%x)",
 			impl, part, major, minor);
 	}
@@ -297,7 +297,7 @@ of_env_get(struct roc_model *model)
 	FILE *fp;
 
 	if (access(path, F_OK) != 0) {
-		strncpy(model->env, "HW_PLATFORM", ROC_MODEL_STR_LEN_MAX - 1);
+		strlcpy(model->env, "HW_PLATFORM", ROC_MODEL_STR_LEN_MAX);
 		model->flag |= ROC_ENV_HW;
 		return;
 	}
-- 
2.53.0

[PATCH 02/17] common/mlx5: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: aec086c9f1c8 ("common/mlx5: share kernel interface name getter")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/common/mlx5/linux/mlx5_common_os.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/common/mlx5/linux/mlx5_common_os.c b/drivers/common/mlx5/linux/mlx5_common_os.c
index e3db6c4124..53bcc9b844 100644
--- a/drivers/common/mlx5/linux/mlx5_common_os.c
+++ b/drivers/common/mlx5/linux/mlx5_common_os.c
@@ -231,7 +231,7 @@ mlx5_get_ifname_sysfs(const char *ibdev_path, char *ifname)
 		rte_errno = ENOENT;
 		return -rte_errno;
 	}
-	strncpy(ifname, match, IF_NAMESIZE);
+	strlcpy(ifname, match, IF_NAMESIZE);
 	return 0;
 }
 
-- 
2.53.0

[PATCH 03/17] crypto/mvsam: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 25b05a1c806b ("crypto/mvsam: parse max number of sessions")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/crypto/mvsam/rte_mrvl_pmd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/mvsam/rte_mrvl_pmd.c b/drivers/crypto/mvsam/rte_mrvl_pmd.c
index a824719fb0..65a63c9d62 100644
--- a/drivers/crypto/mvsam/rte_mrvl_pmd.c
+++ b/drivers/crypto/mvsam/rte_mrvl_pmd.c
@@ -1146,7 +1146,7 @@ parse_name_arg(const char *key __rte_unused,
 		return -EINVAL;
 	}
 
-	strncpy(params->name, value, RTE_CRYPTODEV_NAME_MAX_LEN);
+	strlcpy(params->name, value, RTE_CRYPTODEV_NAME_MAX_LEN);
 
 	return 0;
 }
-- 
2.53.0

[PATCH 04/17] crypto/scheduler: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 85b00824aeef ("crypto/scheduler: rename slave to worker")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/crypto/scheduler/scheduler_pmd.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/scheduler/scheduler_pmd.c b/drivers/crypto/scheduler/scheduler_pmd.c
index 95ce893f05..ceaefa329b 100644
--- a/drivers/crypto/scheduler/scheduler_pmd.c
+++ b/drivers/crypto/scheduler/scheduler_pmd.c
@@ -229,10 +229,10 @@ cryptodev_scheduler_create(const char *name,
 			return -ENOMEM;
 		}
 
-		strncpy(sched_ctx->init_worker_names[
+		strlcpy(sched_ctx->init_worker_names[
 					sched_ctx->nb_init_workers],
 				init_params->worker_names[i],
-				RTE_CRYPTODEV_SCHEDULER_NAME_MAX_LEN - 1);
+				RTE_CRYPTODEV_SCHEDULER_NAME_MAX_LEN);
 
 		sched_ctx->nb_init_workers++;
 	}
@@ -443,8 +443,8 @@ parse_worker_arg(const char *key __rte_unused,
 		return -ENOMEM;
 	}
 
-	strncpy(param->worker_names[param->nb_workers++], value,
-			RTE_CRYPTODEV_SCHEDULER_NAME_MAX_LEN - 1);
+	strlcpy(param->worker_names[param->nb_workers++], value,
+			RTE_CRYPTODEV_SCHEDULER_NAME_MAX_LEN);
 
 	return 0;
 }
-- 
2.53.0

Re: [PATCH 04/17] crypto/scheduler: replace strncpy with strlcpy

[Bruce Richardson]

On Tue, Jun 23, 2026 at 05:51:34PM +0100, Bruce Richardson wrote:
> Replace strncpy() with safer strlcpy() which always null-terminates.
> 
> Fixes: 85b00824aeef ("crypto/scheduler: rename slave to worker")

Correction, this is not the introducer commit. Instead it's:

Fixes: 50e14527b9d1 ("crypto/scheduler: improve parameters parsing")


> Cc: stable@dpdk.org
> 
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
>  drivers/crypto/scheduler/scheduler_pmd.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/crypto/scheduler/scheduler_pmd.c b/drivers/crypto/scheduler/scheduler_pmd.c
> index 95ce893f05..ceaefa329b 100644
> --- a/drivers/crypto/scheduler/scheduler_pmd.c
> +++ b/drivers/crypto/scheduler/scheduler_pmd.c
> @@ -229,10 +229,10 @@ cryptodev_scheduler_create(const char *name,
>  			return -ENOMEM;
>  		}
>  
> -		strncpy(sched_ctx->init_worker_names[
> +		strlcpy(sched_ctx->init_worker_names[
>  					sched_ctx->nb_init_workers],
>  				init_params->worker_names[i],
> -				RTE_CRYPTODEV_SCHEDULER_NAME_MAX_LEN - 1);
> +				RTE_CRYPTODEV_SCHEDULER_NAME_MAX_LEN);
>  
>  		sched_ctx->nb_init_workers++;
>  	}
> @@ -443,8 +443,8 @@ parse_worker_arg(const char *key __rte_unused,
>  		return -ENOMEM;
>  	}
>  
> -	strncpy(param->worker_names[param->nb_workers++], value,
> -			RTE_CRYPTODEV_SCHEDULER_NAME_MAX_LEN - 1);
> +	strlcpy(param->worker_names[param->nb_workers++], value,
> +			RTE_CRYPTODEV_SCHEDULER_NAME_MAX_LEN);
>  
>  	return 0;
>  }
> -- 
> 2.53.0
> 

[PATCH 05/17] event/cnxk: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: b5a52c9d97e2 ("event/cnxk: add event port and queue xstats")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/event/cnxk/cnxk_eventdev_stats.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/event/cnxk/cnxk_eventdev_stats.c b/drivers/event/cnxk/cnxk_eventdev_stats.c
index 6dea91aedf..288d34bd7e 100644
--- a/drivers/event/cnxk/cnxk_eventdev_stats.c
+++ b/drivers/event/cnxk/cnxk_eventdev_stats.c
@@ -283,7 +283,7 @@ cnxk_sso_xstats_get_names(const struct rte_eventdev *event_dev,
 
 	for (i = 0; i < xstats_mode_count; i++) {
 		xidx = i + start_offset;
-		strncpy(xstats_names[i].name, xstats_names_copy[xidx].name,
+		strlcpy(xstats_names[i].name, xstats_names_copy[xidx].name,
 			sizeof(xstats_names[i].name));
 		ids[i] = xidx;
 	}
-- 
2.53.0

[PATCH 06/17] net/ark: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 1131cbf0fb2b ("net/ark: stub PMD for Atomic Rules Arkville")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/ark/ark_ethdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ark/ark_ethdev.c b/drivers/net/ark/ark_ethdev.c
index 9272e271e6..d6b1abf383 100644
--- a/drivers/net/ark/ark_ethdev.c
+++ b/drivers/net/ark/ark_ethdev.c
@@ -929,7 +929,7 @@ process_file_args(const char *key, const char *value, void *extra_args)
 			return -1;
 		}
 		if (first) {
-			strncpy(args, line, ARK_MAX_ARG_LEN);
+			strlcpy(args, line, ARK_MAX_ARG_LEN);
 			first = 0;
 		} else {
 			strncat(args, line, ARK_MAX_ARG_LEN);
-- 
2.53.0

[PATCH 07/17] net/bnx2x: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 540a211084a7 ("bnx2x: driver core")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/bnx2x/bnx2x.c      | 2 +-
 drivers/net/bnx2x/bnx2x_vfpf.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bnx2x/bnx2x.c b/drivers/net/bnx2x/bnx2x.c
index 8790c858d5..1a3956b224 100644
--- a/drivers/net/bnx2x/bnx2x.c
+++ b/drivers/net/bnx2x/bnx2x.c
@@ -3596,7 +3596,7 @@ static void bnx2x_drv_info_ether_stat(struct bnx2x_softc *sc)
 {
 	struct eth_stats_info *ether_stat = &sc->sp->drv_info_to_mcp.ether_stat;
 
-	strncpy(ether_stat->version, BNX2X_DRIVER_VERSION,
+	strlcpy(ether_stat->version, BNX2X_DRIVER_VERSION,
 		ETH_STAT_INFO_VERSION_LEN);
 
 	sc->sp_objs[0].mac_obj.get_n_elements(sc, &sc->sp_objs[0].mac_obj,
diff --git a/drivers/net/bnx2x/bnx2x_vfpf.c b/drivers/net/bnx2x/bnx2x_vfpf.c
index 5411df3a38..23f576877f 100644
--- a/drivers/net/bnx2x/bnx2x_vfpf.c
+++ b/drivers/net/bnx2x/bnx2x_vfpf.c
@@ -303,7 +303,7 @@ int bnx2x_vf_get_resources(struct bnx2x_softc *sc, uint8_t tx_count, uint8_t rx_
 
 	PMD_DRV_LOG(DEBUG, sc, "status block count = %d, base status block = %x",
 		sc->igu_sb_cnt, sc->igu_base_sb);
-	strncpy(sc->fw_ver, sc_resp.fw_ver, sizeof(sc->fw_ver));
+	strlcpy(sc->fw_ver, sc_resp.fw_ver, sizeof(sc->fw_ver));
 
 	if (rte_is_valid_assigned_ether_addr(&sc_resp.resc.current_mac_addr))
 		rte_ether_addr_copy(&sc_resp.resc.current_mac_addr,
-- 
2.53.0

[PATCH 08/17] net/cnxk: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 804c585658ea ("net/cnxk: add representor control plane")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/cnxk/cnxk_eswitch.c | 4 ++--
 drivers/net/cnxk/cnxk_rep_msg.c | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/cnxk/cnxk_eswitch.c b/drivers/net/cnxk/cnxk_eswitch.c
index e45c7dfd07..50c3e54109 100644
--- a/drivers/net/cnxk/cnxk_eswitch.c
+++ b/drivers/net/cnxk/cnxk_eswitch.c
@@ -124,8 +124,8 @@ cnxk_eswitch_dev_remove(struct rte_pci_device *pci_dev)
 				}
 				sun.sun_family = AF_UNIX;
 				sunlen = sizeof(struct sockaddr_un);
-				strncpy(sun.sun_path, CNXK_ESWITCH_CTRL_MSG_SOCK_PATH,
-					sizeof(sun.sun_path) - 1);
+				strlcpy(sun.sun_path, CNXK_ESWITCH_CTRL_MSG_SOCK_PATH,
+					sizeof(sun.sun_path));
 
 				if (connect(sock_fd, (struct sockaddr *)&sun, sunlen) < 0) {
 					plt_err("Failed to connect socket: %s, err %d",
diff --git a/drivers/net/cnxk/cnxk_rep_msg.c b/drivers/net/cnxk/cnxk_rep_msg.c
index a222e2b5cd..7b92e7a5f7 100644
--- a/drivers/net/cnxk/cnxk_rep_msg.c
+++ b/drivers/net/cnxk/cnxk_rep_msg.c
@@ -138,7 +138,7 @@ open_socket_ctrl_channel(void)
 
 	memset(&un, 0, sizeof(struct sockaddr_un));
 	un.sun_family = AF_UNIX;
-	strncpy(un.sun_path, CNXK_ESWITCH_CTRL_MSG_SOCK_PATH, sizeof(un.sun_path) - 1);
+	strlcpy(un.sun_path, CNXK_ESWITCH_CTRL_MSG_SOCK_PATH, sizeof(un.sun_path));
 
 	if (bind(sock_fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
 		plt_err("Failed to bind %s: %s", un.sun_path, strerror(errno));
-- 
2.53.0

[PATCH 09/17] net/dpaa: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: ee0fa7552a0a ("net/dpaa: forbid MTU configuration for shared interface")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/dpaa/dpaa_ethdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dpaa/dpaa_ethdev.c b/drivers/net/dpaa/dpaa_ethdev.c
index 9f976d179b..8b1072f9b9 100644
--- a/drivers/net/dpaa/dpaa_ethdev.c
+++ b/drivers/net/dpaa/dpaa_ethdev.c
@@ -247,7 +247,7 @@ dpaa_eth_dev_configure(struct rte_eth_dev *dev)
 			DPAA_PMD_ERR("Cannot open IF socket");
 			return -errno;
 		}
-		strncpy(ifr.ifr_name, dpaa_intf->name, IFNAMSIZ - 1);
+		strlcpy(ifr.ifr_name, dpaa_intf->name, IFNAMSIZ);
 
 		if (ioctl(socket_fd, SIOCGIFMTU, &ifr) < 0) {
 			DPAA_PMD_ERR("Cannot get interface mtu");
-- 
2.53.0

[PATCH 10/17] net/ionic: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 5ef518098ec6 ("net/ionic: register and initialize adapter")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/ionic/ionic_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ionic/ionic_main.c b/drivers/net/ionic/ionic_main.c
index 814bb3b8f4..d5545b1ecb 100644
--- a/drivers/net/ionic/ionic_main.c
+++ b/drivers/net/ionic/ionic_main.c
@@ -393,8 +393,8 @@ ionic_identify(struct ionic_adapter *adapter)
 	ident->drv.kernel_ver = 0;
 	snprintf(ident->drv.kernel_ver_str,
 		sizeof(ident->drv.kernel_ver_str), "DPDK");
-	strncpy(ident->drv.driver_ver_str, IONIC_DRV_VERSION,
-		sizeof(ident->drv.driver_ver_str) - 1);
+	strlcpy(ident->drv.driver_ver_str, IONIC_DRV_VERSION,
+		sizeof(ident->drv.driver_ver_str));
 
 	nwords = RTE_MIN(drv_size, cmd_size);
 	for (i = 0; i < nwords; i++)
-- 
2.53.0

[PATCH 11/17] net/mlx4: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 61cbdd419478 ("net/mlx4: separate device control functions")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/mlx4/mlx4_ethdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/mlx4/mlx4_ethdev.c b/drivers/net/mlx4/mlx4_ethdev.c
index efc6ee4577..ff353af224 100644
--- a/drivers/net/mlx4/mlx4_ethdev.c
+++ b/drivers/net/mlx4/mlx4_ethdev.c
@@ -127,7 +127,7 @@ mlx4_get_ifname(const struct mlx4_priv *priv, char (*ifname)[IF_NAMESIZE])
 		rte_errno = ENODEV;
 		return -rte_errno;
 	}
-	strncpy(*ifname, match, sizeof(*ifname));
+	strlcpy(*ifname, match, sizeof(*ifname));
 	return 0;
 }
 
-- 
2.53.0

[PATCH 12/17] net/mlx5: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: ca1418ce3910 ("common/mlx5: share device context object")
Fixes: 9e58a50c059f ("net/mlx5: fix interface name parameter definition")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/mlx5/mlx5.c                   | 8 ++++----
 drivers/net/mlx5/windows/mlx5_ethdev_os.c | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 61c26d1206..24fda18710 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -1916,10 +1916,10 @@ mlx5_alloc_shared_dev_ctx(const struct mlx5_dev_spawn_data *spawn,
 	sh->txpp.skew = sh->config.tx_skew;
 	sh->refcnt = 1;
 	sh->max_port = spawn->max_port;
-	strncpy(sh->ibdev_name, mlx5_os_get_ctx_device_name(sh->cdev->ctx),
-		sizeof(sh->ibdev_name) - 1);
-	strncpy(sh->ibdev_path, mlx5_os_get_ctx_device_path(sh->cdev->ctx),
-		sizeof(sh->ibdev_path) - 1);
+	strlcpy(sh->ibdev_name, mlx5_os_get_ctx_device_name(sh->cdev->ctx),
+		sizeof(sh->ibdev_name));
+	strlcpy(sh->ibdev_path, mlx5_os_get_ctx_device_path(sh->cdev->ctx),
+		sizeof(sh->ibdev_path));
 	sh->phdev = mlx5_get_physical_device(sh->cdev);
 	if (!sh->phdev)
 		goto error;
diff --git a/drivers/net/mlx5/windows/mlx5_ethdev_os.c b/drivers/net/mlx5/windows/mlx5_ethdev_os.c
index e24ff367af..ecb8914a65 100644
--- a/drivers/net/mlx5/windows/mlx5_ethdev_os.c
+++ b/drivers/net/mlx5/windows/mlx5_ethdev_os.c
@@ -67,7 +67,7 @@ mlx5_get_ifname(const struct rte_eth_dev *dev, char ifname[MLX5_NAMESIZE])
 	}
 	priv = dev->data->dev_private;
 	context_obj = (mlx5_context_st *)priv->sh->cdev->ctx;
-	strncpy(ifname, context_obj->mlx5_dev.name, MLX5_NAMESIZE);
+	strlcpy(ifname, context_obj->mlx5_dev.name, MLX5_NAMESIZE);
 	return 0;
 }
 
-- 
2.53.0

[PATCH 13/17] net/nfp: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: c7e9729da6b5 ("net/nfp: support CPP")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/nfp/nfpcore/nfp_resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/nfp/nfpcore/nfp_resource.c b/drivers/net/nfp/nfpcore/nfp_resource.c
index 6437a78852..781350c46f 100644
--- a/drivers/net/nfp/nfpcore/nfp_resource.c
+++ b/drivers/net/nfp/nfpcore/nfp_resource.c
@@ -168,7 +168,7 @@ nfp_resource_acquire(struct nfp_cpp *cpp,
 
 	memset(res, 0, sizeof(*res));
 
-	strncpy(res->name, name, NFP_RESOURCE_ENTRY_NAME_SZ);
+	strlcpy(res->name, name, sizeof(res->name));
 
 	dev_mutex = nfp_cpp_mutex_alloc(cpp, NFP_RESOURCE_TBL_TARGET,
 			NFP_RESOURCE_TBL_BASE, NFP_RESOURCE_TBL_KEY);
-- 
2.53.0

[PATCH 14/17] net/qede: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 7eca78cefde8 ("net/qede: fix driver version string")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/qede/qede_ethdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/qede/qede_ethdev.c b/drivers/net/qede/qede_ethdev.c
index 4efc2dd349..2f37f956cb 100644
--- a/drivers/net/qede/qede_ethdev.c
+++ b/drivers/net/qede/qede_ethdev.c
@@ -2596,7 +2596,7 @@ static int qede_common_dev_init(struct rte_eth_dev *eth_dev, bool is_vf)
 	params.drv_minor = QEDE_PMD_VERSION_MINOR;
 	params.drv_rev = QEDE_PMD_VERSION_REVISION;
 	params.drv_eng = QEDE_PMD_VERSION_PATCH;
-	strncpy((char *)params.name, QEDE_PMD_VER_PREFIX,
+	strlcpy((char *)params.name, QEDE_PMD_VER_PREFIX,
 		QEDE_PMD_DRV_VER_STR_SIZE);
 
 	qede_assign_rxtx_handlers(eth_dev, true);
-- 
2.53.0

Re: [PATCH 14/17] net/qede: replace strncpy with strlcpy

[Bruce Richardson]

On Tue, Jun 23, 2026 at 05:51:44PM +0100, Bruce Richardson wrote:
> Replace strncpy() with safer strlcpy() which always null-terminates.
> 
> Fixes: 7eca78cefde8 ("net/qede: fix driver version string")

Correction:
Fixes: 2ea6f76aff40 ("qede: add core driver")


> Cc: stable@dpdk.org
> 
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
>  drivers/net/qede/qede_ethdev.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/qede/qede_ethdev.c b/drivers/net/qede/qede_ethdev.c
> index 4efc2dd349..2f37f956cb 100644
> --- a/drivers/net/qede/qede_ethdev.c
> +++ b/drivers/net/qede/qede_ethdev.c
> @@ -2596,7 +2596,7 @@ static int qede_common_dev_init(struct rte_eth_dev *eth_dev, bool is_vf)
>  	params.drv_minor = QEDE_PMD_VERSION_MINOR;
>  	params.drv_rev = QEDE_PMD_VERSION_REVISION;
>  	params.drv_eng = QEDE_PMD_VERSION_PATCH;
> -	strncpy((char *)params.name, QEDE_PMD_VER_PREFIX,
> +	strlcpy((char *)params.name, QEDE_PMD_VER_PREFIX,
>  		QEDE_PMD_DRV_VER_STR_SIZE);
>  
>  	qede_assign_rxtx_handlers(eth_dev, true);
> -- 
> 2.53.0
> 

[PATCH 15/17] net/softnic: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 7709a63bf178 ("net/softnic: add connection agent")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/softnic/conn.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/softnic/conn.c b/drivers/net/softnic/conn.c
index 5b031358d5..d34030ce63 100644
--- a/drivers/net/softnic/conn.c
+++ b/drivers/net/softnic/conn.c
@@ -116,8 +116,8 @@ softnic_conn_init(struct softnic_conn_params *p)
 	}
 
 	/* Fill in */
-	strncpy(conn->welcome, p->welcome, CONN_WELCOME_LEN_MAX);
-	strncpy(conn->prompt, p->prompt, CONN_PROMPT_LEN_MAX);
+	strlcpy(conn->welcome, p->welcome, CONN_WELCOME_LEN_MAX + 1);
+	strlcpy(conn->prompt, p->prompt, CONN_PROMPT_LEN_MAX + 1);
 	conn->buf_size = p->buf_size;
 	conn->msg_in_len_max = p->msg_in_len_max;
 	conn->msg_out_len_max = p->msg_out_len_max;
-- 
2.53.0

[PATCH 16/17] net/vhost: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: 2e16597c4bda ("net/vhost: move to vhost library statistics API")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/vhost/rte_eth_vhost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c
index 05940f2461..82e9fc929a 100644
--- a/drivers/net/vhost/rte_eth_vhost.c
+++ b/drivers/net/vhost/rte_eth_vhost.c
@@ -209,7 +209,7 @@ vhost_dev_xstats_get_names(struct rte_eth_dev *dev,
 	}
 
 	for (i = 0; i < count; i++)
-		strncpy(xstats_names[i].name, name[i].name, RTE_ETH_XSTATS_NAME_SIZE);
+		strlcpy(xstats_names[i].name, name[i].name, RTE_ETH_XSTATS_NAME_SIZE);
 
 	free(name);
 
-- 
2.53.0

[PATCH 17/17] net/virtio: replace strncpy with strlcpy

[Bruce Richardson]

Replace strncpy() with safer strlcpy() which always null-terminates.

Fixes: b72099be7f27 ("net/virtio-user: fix init when using existing tap")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/virtio/virtio_user/vhost_kernel_tap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
index 2431d00c33..da55aba505 100644
--- a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
+++ b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
@@ -60,7 +60,7 @@ vhost_tap_open(const char *ifname, unsigned int r_flags, bool multi_queue)
 
 retry_mono_q:
 	memset(&ifr, 0, sizeof(ifr));
-	strncpy(ifr.ifr_name, ifname, IFNAMSIZ - 1);
+	strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 	ifr.ifr_flags = r_flags;
 	if (multi_queue)
 		ifr.ifr_flags |= IFF_MULTI_QUEUE;
-- 
2.53.0

Re: [PATCH 00/17] drivers: replace strncpy with strlcpy

[Stephen Hemminger]

On Tue, 23 Jun 2026 17:51:30 +0100
Bruce Richardson <bruce.richardson@intel.com> wrote:

> Many uses of strncpy in DPDK drivers can be directly replaced by
> a call to strlcpy instead, which is safer in that it always null-
> terminates the string. This AI assisted patchset makes those
> simple replacements, adjusting lengths as appropriate.
> 
> After this set, there are still a number of drivers with strncpy calls
> in them, but those are not simple strncpy->strlcpy replacements, so
> left for later rework.

Maybe a coccinelle script?