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Date: Fri, 20 Oct 2023 23:18:59 +0000
From: Justin Stitt <>
To: Bjorn Andersson <>, Mathieu Poirier <>
Cc:,,, Justin Stitt <>
Subject: [PATCH] rpmsg: replace deprecated strncpy with strscpy_pad

strncpy() is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string

We expect to be NUL-terminated based on its use with format
|       dev_err(&ctrldev->dev, "failed to create %s channel\n",;

Since chinfo is not default initialized, we should NUL-pad the `name`
field so that the behavior is consistent with what strncpy() provides:
|       struct rpmsg_channel_info chinfo;

Considering the above, a suitable replacement is `strscpy_pad` due to
the fact that it guarantees both NUL-termination and NUL-padding on the
destination buffer.

Link: [1]
Signed-off-by: Justin Stitt <>
Note: build-tested only.

Found with: $ rg "strncpy\("
 drivers/rpmsg/rpmsg_ns.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rpmsg/rpmsg_ns.c b/drivers/rpmsg/rpmsg_ns.c
index c70ad03ff2e9..bde8c8d433e0 100644
--- a/drivers/rpmsg/rpmsg_ns.c
+++ b/drivers/rpmsg/rpmsg_ns.c
@@ -50,7 +50,7 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
 	/* don't trust the remote processor for null terminating the name */
 	msg->name[RPMSG_NAME_SIZE - 1] = '\0';
-	strncpy(, msg->name, sizeof(;
+	strscpy_pad(, msg->name, sizeof(;
 	chinfo.src = RPMSG_ADDR_ANY;
 	chinfo.dst = rpmsg32_to_cpu(rpdev, msg->addr);

base-commit: 9c5d00cb7b6bbc5a7965d9ab7d223b5402d1f02c
change-id: 20231020-strncpy-drivers-rpmsg-rpmsg_ns-c-ffe3fa2bb9ff

Best regards,
Justin Stitt <>

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