linux-kernel - Re: [PATCH 5.10 1/1] rpmsg: qcom: glink: replace strncpy() with strscpy

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Date:   Fri, 7 Oct 2022 18:40:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Andrew Chernyakov <acherniakov@...ralinux.ru>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        stable@...r.kernel.org, lvc-project@...uxtesting.org,
        Stephen Boyd <sboyd@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: Re: [PATCH 5.10 1/1] rpmsg: qcom: glink: replace strncpy() with
 strscpy_pad()

On Fri, Oct 07, 2022 at 04:29:31PM +0300, Andrew Chernyakov wrote:
> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.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@...aro.org>
> Reviewed-by: Stephen Boyd <sboyd@...nel.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Link: https://lore.kernel.org/r/20220519073330.7187-1-krzysztof.kozlowski@linaro.org
> Signed-off-by: Andrew Chernyakov <acherniakov@...ralinux.ru>
> ---
>  drivers/rpmsg/qcom_glink_native.c | 2 +-
>  drivers/rpmsg/qcom_smd.c          | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)

Why just this specific kernel branch?  We can't add patches to an older
tree and have someone upgrade to a newer one and hit the same issue.

So please provide backports for all active versions.  In this case that
would be 5.15.y and 5.19.y.

thanks,

greg k-h