[5.10,1/1] Backport of rpmsg: qcom: glink: replace strncpy() with strscpy_pad()

The use of strncpy() is considered deprecated for NULL-terminated
strings[1]. Replace strncpy() with strscpy_pad(), to keep existing
pad-behavior of strncpy, strncpy was found on line 1424 of
/drivers/rpmsg/qcom_glink_native.c.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Andrew Chernyakov <acherniakov@astralinux.ru>
---
 drivers/rpmsg/qcom_glink_native.c | 2 +-
 drivers/rpmsg/qcom_smd.c          | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

Dear Andrew,

For backporting patches you should follow the following pattern:

---------------------------------------------
Subject: [PATCH 5.10 1/1] {ORIGINAL COMMIT SUBJECT}

From:  {ORIGINAL AUTHOR EMAIL}

commit {ORIGINAL COMMIT HASH} upstream.

{ORIGINAL COMMIT TEXT INCLUDING ALL SIGGNED_OFF}

Signed-off-by: {YOUR EMAIL}
---
{ORIGINAL PATCH}
---------------------------------------------

e.g.
---------------------------------------------
Subject: [PATCH 5.10 1/1] rpmsg: qcom: glink: replace strncpy() with
strscpy_pad()

From:  Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

commit 766279a8f85df32345dbda03b102ca1ee3d5ddea upstream.

The use of strncpy() is considered deprecated for NUL-terminated
strings[1]. Replace strncpy() with strscpy_pad(), to keep existing
pad-behavior of strncpy, similarly to commit 08de420a8014 ("rpmsg:
glink: Replace strncpy() with strscpy_pad()").  This fixes W=1 warning:

  In function ‘qcom_glink_rx_close’,
    inlined from ‘qcom_glink_work’ at
../drivers/rpmsg/qcom_glink_native.c:1638:4:
  drivers/rpmsg/qcom_glink_native.c:1549:17: warning: ‘strncpy’
specified bound 32 equals destination size [-Wstringop-truncation]
   1549 |                 strncpy(chinfo.name, channel->name,
sizeof(chinfo.name));

[1]
https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link:
https://lore.kernel.org/r/20220519073330.7187-1-krzysztof.kozlowski@linaro.org

Signed-off-by: Andrew Chernyakov <acherniakov@astralinux.ru>
---
.....
---------------------------------------------

Please update the patch according the requirements and resend.

Thank you,
Alexey


On 07.10.2022 13:41, Andrew Chernyakov wrote:
> The use of strncpy() is considered deprecated for NULL-terminated
> strings[1]. Replace strncpy() with strscpy_pad(), to keep existing
> pad-behavior of strncpy, strncpy was found on line 1424 of
> /drivers/rpmsg/qcom_glink_native.c.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Signed-off-by: Andrew Chernyakov <acherniakov@astralinux.ru>
> ---
>  drivers/rpmsg/qcom_glink_native.c | 2 +-
>  drivers/rpmsg/qcom_smd.c          | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
> index 4840886532ff..66a63b205744 100644
> --- a/drivers/rpmsg/qcom_glink_native.c
> +++ b/drivers/rpmsg/qcom_glink_native.c
> @@ -1424,7 +1424,7 @@ static int qcom_glink_rx_open(struct qcom_glink *glink, unsigned int rcid,
>  		}
>  
>  		rpdev->ept = &channel->ept;
> -		strncpy(rpdev->id.name, name, RPMSG_NAME_SIZE);
> +		strscpy_pad(rpdev->id.name, name, RPMSG_NAME_SIZE);
>  		rpdev->src = RPMSG_ADDR_ANY;
>  		rpdev->dst = RPMSG_ADDR_ANY;
>  		rpdev->ops = &glink_device_ops;
> diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
> index 0b1e853d8c91..b5167ef93abf 100644
> --- a/drivers/rpmsg/qcom_smd.c
> +++ b/drivers/rpmsg/qcom_smd.c
> @@ -1073,7 +1073,7 @@ static int qcom_smd_create_device(struct qcom_smd_channel *channel)
>  
>  	/* Assign public information to the rpmsg_device */
>  	rpdev = &qsdev->rpdev;
> -	strncpy(rpdev->id.name, channel->name, RPMSG_NAME_SIZE);
> +	strscpy_pad(rpdev->id.name, channel->name, RPMSG_NAME_SIZE);
>  	rpdev->src = RPMSG_ADDR_ANY;
>  	rpdev->dst = RPMSG_ADDR_ANY;
>  
> @@ -1304,7 +1304,7 @@ static void qcom_channel_state_worker(struct work_struct *work)
>  
>  		spin_unlock_irqrestore(&edge->channels_lock, flags);
>  
> -		strncpy(chinfo.name, channel->name, sizeof(chinfo.name));
> +		strscpy_pad(chinfo.name, channel->name, sizeof(chinfo.name));
>  		chinfo.src = RPMSG_ADDR_ANY;
>  		chinfo.dst = RPMSG_ADDR_ANY;
>  		rpmsg_unregister_device(&edge->dev, &chinfo);
>

On 07/10/2022 12:41, Andrew Chernyakov wrote:
> The use of strncpy() is considered deprecated for NULL-terminated
> strings[1]. Replace strncpy() with strscpy_pad(), to keep existing
> pad-behavior of strncpy, strncpy was found on line 1424 of
> /drivers/rpmsg/qcom_glink_native.c.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Signed-off-by: Andrew Chernyakov <acherniakov@astralinux.ru>

This is not a correct backport. You lost entire information about
original patch and its history. You even dropped my authorship. The
certificate of origin chain is broken and not correct.

You must follow the process of backporting of patches:

https://elixir.bootlin.com/linux/v5.19.14/source/Documentation/process/submitting-patches.rst

Best regards,
Krzysztof