linux-kernel - Re: [PATCH] ath10k: replace deprecated strncpy with strtomem

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <202310241442.0E90AB9@keescook>
Date:   Tue, 24 Oct 2023 14:43:09 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Jeff Johnson <quic_jjohnson@...cinc.com>
Cc:     Kalle Valo <kvalo@...nel.org>,
        Justin Stitt <justinstitt@...gle.com>,
        ath10k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] ath10k: replace deprecated strncpy with strtomem_pad

On Tue, Oct 24, 2023 at 07:11:51AM -0700, Jeff Johnson wrote:
> On 10/24/2023 6:03 AM, Kalle Valo wrote:
> > What about using just memcpy() to make it clear it's not really a proper
> > string:
> > 
> > arvif->u.ap.ssid_len = 4;
> > memcpy(arvif->u.ap.ssid, "mesh", arvif->u.ap.ssid_len);
> > 
> 
> In the "changed & BSS_CHANGED_SSID" case that comes soon after this we just
> set the length and use memcpy without clearing the rest of the buffer, so
> doing the same here, as you suggest, would be consistent.

Ah, please ignore my other email asking about memcpy safety -- I'm
reading threads backwards.  :)

-- 
Kees Cook