linux-kernel - Re: [PATCH] cfg80211: cfg80211: strlcpy withreturn

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: <87fs6ufq5r.fsf@kernel.org>
Date:   Wed, 14 Jun 2023 10:40:00 +0300
From:   Kalle Valo <kvalo@...nel.org>
To:     Azeem Shaikh <azeemshaikh38@...il.com>
Cc:     Johannes Berg <johannes@...solutions.net>,
        linux-hardening@...r.kernel.org, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Subject: Re: [PATCH] cfg80211: cfg80211: strlcpy withreturn

Azeem Shaikh <azeemshaikh38@...il.com> writes:

> strlcpy() reads the entire source buffer first.
> This read may exceed the destination size limit.
> This is both inefficient and can lead to linear read
> overflows if a source string is not NUL-terminated [1].
> In an effort to remove strlcpy() completely [2], replace
> strlcpy() here with strscpy().
>
> Direct replacement is safe here since WIPHY_ASSIGN is only used by
> TRACE macros and the return values are ignored.
>
> [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
> [2] https://github.com/KSPP/linux/issues/89
>
> Signed-off-by: Azeem Shaikh <azeemshaikh38@...il.com>

The title should be:

wifi: cfg80211: replace strlcpy() with strlscpy()

-- 
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches