[apparmor] [PATCH RESEND] apparmor: Fix string overrun due to missing termination

[Georgia Garcia]

Hello,

On Fri, 2026-03-27 at 19:58 +0800, Daniel J Blueman wrote:
> This was introduced by previous incorrect conversion from strcpy(). Fix it
> by adding the missing terminator.
> 

Looks good to me,

Reviewed-by: Georgia Garcia <georgia.garcia at canonical.com>

> Cc: stable at vger.kernel.org
> Signed-off-by: Daniel J Blueman <daniel at quora.org>
> Fixes: 93d4dbdc8da0 ("apparmor: Replace deprecated strcpy in d_namespace_path")
> ---
>  security/apparmor/path.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/security/apparmor/path.c b/security/apparmor/path.c
> index 65a0ca5cc1bd..2494e8101538 100644
> --- a/security/apparmor/path.c
> +++ b/security/apparmor/path.c
> @@ -164,14 +164,16 @@ static int d_namespace_path(const struct path *path, char *buf, char **name,
>  	}
>  
>  out:
> -	/* Append "/" to directory paths, except for root "/" which
> -	 * already ends in a slash.
> +	/* Append "/" to directory paths and reterminate string, except for
> +	 * root "/" which already ends in a slash.
>  	 */
>  	if (!error && isdir) {
>  		bool is_root = (*name)[0] == '/' && (*name)[1] == '\0';
>  
> -		if (!is_root)
> +		if (!is_root) {
>  			buf[aa_g_path_max - 2] = '/';
> +			buf[aa_g_path_max - 1] = '\0';
> +		}
>  	}
>  
>  	return error;
> --
> 2.53.0