netdev - Re: [PATCH] net: mac80211: cfg: enforce sanity checks for key_index in ieee80211_del

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] [day] [month] [year] [list]

Date:   Tue, 01 Dec 2020 13:56:13 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     Anant Thazhemadam <anant.thazhemadam@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        syzbot+49d4cab497c2142ee170@...kaller.appspotmail.com
Subject: Re: [PATCH] net: mac80211: cfg: enforce sanity checks for key_index
 in ieee80211_del_key()

On Tue, 2020-12-01 at 18:15 +0530, Anant Thazhemadam wrote:
> 
> cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher) returned
> false, and thus it worked for the syzbot reproducer.
> Would it be a safer idea to enforce the conditions that I initially put (in
> ieee80211_del_key()) directly in cfg80211_validate_key_settings() itself - by
> updating max_key_index, and checking accordingly?

Yes, I think so. But similarly to cfg80211_validate_key_settings() it
should look at the device capabilities (beacon protection, etc.)

Thanks!
johannes