linux-kernel - Re: [PATCH] modpost: support arbitrary symbol length in modversion

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20230119155709.20d87e35.gary@garyguo.net>
Date:   Thu, 19 Jan 2023 15:57:09 +0000
From:   Gary Guo <gary@...yguo.net>
To:     Michal Suchánek <msuchanek@...e.de>
Cc:     Lucas De Marchi <lucas.demarchi@...el.com>,
        Kees Cook <keescook@...omium.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        linux-kbuild@...r.kernel.org, Joel Stanley <joel@....id.au>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        rust-for-linux@...r.kernel.org,
        Guo Zhengkui <guozhengkui@...o.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kernel@...r.kernel.org, Julia Lawall <Julia.Lawall@...ia.fr>,
        Luis Chamberlain <mcgrof@...nel.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-modules@...r.kernel.org
Subject: Re: [PATCH] modpost: support arbitrary symbol length in modversion

On Thu, 19 Jan 2023 16:18:57 +0100
Michal Suchánek <msuchanek@...e.de> wrote:

> On Thu, Jan 19, 2023 at 03:09:36PM +0000, Gary Guo wrote:
> > On Tue, 17 Jan 2023 11:22:45 -0800
> > Lucas De Marchi <lucas.demarchi@...el.com> wrote:
> >   
> > > And the additional 0's should compress well
> > > so I'm not sure the additional size is that much relevant here.  
> > 
> > I am not sure why compression is mentioned here. I don't think section
> > in .ko files are compressed.  
> 
> There is the option to compress the whole .ko files, and it's commonly
> used.

Hi Michal,

I am aware that there is an option but I am surprised to hear that it's
commonly used. I don't think that's enabled by default, and certainly
Debian/Ubuntu does not have it enabled.

Best,
Gary