lkml.org 
[lkml]   [2023]   [Oct]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH] ath5k: replace deprecated strncpy with strscpy
From
On 13. 10. 23, 22:53, Justin Stitt wrote:
> strncpy() is deprecated for use on NUL-terminated destination strings
> [1] and as such we should prefer more robust and less ambiguous string
> interfaces.
>
> We expect led->name to be NUL-terminated based on the presence of a
> manual NUL-byte assignment.
>
> This NUL-byte assignment was added in Commit daf9669bea30aa22 ("ath5k:
> ensure led name is null terminated"). If strscpy() had existed and had
> been used back when this code was written then potential bugs and the
> need to manually NUL-terminate could have been avoided. Since we now
> have the technology, let's use it :)
>
> Considering the above, a suitable replacement is `strscpy` [2] due to
> the fact that it guarantees NUL-termination on the destination buffer
> without unnecessarily NUL-padding. If NUL-padding is required let's opt
> for strscpy_pad().
>
> Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
> Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
> Link: https://github.com/KSPP/linux/issues/90
> Cc: linux-hardening@vger.kernel.org
> Signed-off-by: Justin Stitt <justinstitt@google.com>

LGTM
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>


--
js
suse labs

\
 
 \ /
  Last update: 2023-10-16 08:00    [W:0.417 / U:0.244 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site