linux-kernel - Re: [PATCH] random32: Restore __latent_entropy attribute on net_rand

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: <20201002152219.GB3875@1wt.eu>
Date:   Fri, 2 Oct 2020 17:22:19 +0200
From:   Willy Tarreau <w@....eu>
To:     Thibaut Sautereau <thibaut.sautereau@...p-os.org>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Kees Cook <keescook@...omium.org>, netdev@...r.kernel.org,
        kernel-hardening@...ts.openwall.com, linux-kernel@...r.kernel.org,
        Thibaut Sautereau <thibaut.sautereau@....gouv.fr>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Emese Revfy <re.emese@...il.com>
Subject: Re: [PATCH] random32: Restore __latent_entropy attribute on
 net_rand_state

On Fri, Oct 02, 2020 at 05:16:11PM +0200, Thibaut Sautereau wrote:
> From: Thibaut Sautereau <thibaut.sautereau@....gouv.fr>
> 
> Commit f227e3ec3b5c ("random32: update the net random state on interrupt
> and activity") broke compilation and was temporarily fixed by Linus in
> 83bdc7275e62 ("random32: remove net_rand_state from the latent entropy
> gcc plugin") by entirely moving net_rand_state out of the things handled
> by the latent_entropy GCC plugin.
> 
> From what I understand when reading the plugin code, using the
> __latent_entropy attribute on a declaration was the wrong part and
> simply keeping the __latent_entropy attribute on the variable definition
> was the correct fix.

Ah thank you, this is what I tried to figure and failed to! Spender
mentioned that a one-liner was all that was needed to fix this but
never responded to my request asking about it.

Willy