linux-kernel - Re: [PATCH] fs/proc: add compile time info

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:   Thu, 15 Sep 2022 13:37:02 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Florian Eckert <fe@....tdt.de>
Cc:     Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux FS-devel Mailing List <linux-fsdevel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Eckert.Florian@...glemail.com
Subject: Re: [PATCH] fs/proc: add compile time info

On Mon, Sep 12, 2022 at 6:42 PM Florian Eckert <fe@....tdt.de> wrote:
>
> Hello Masahiro,
>
> thanks for your feedback.
>
> > https://patchwork.kernel.org/project/linux-kbuild/patch/20220828024003.28873-6-masahiroy@kernel.org/
> > lands, nobody cannot reference KBUILD_BUILD_TIMESTAMP,
> > then this whack-a-mole game will end.
>
> I was not aware of that problem. Thanks for the link.
>
> I understood that this is a bad idea to create the timestamp for proc
> like this!
> But how does it look in principle to offer the build timestamp in proc
> for reading?
> You have only made your point about creating the timestamp but not about
> reading it out via the proc directory.
>
> So far the timestamp is only readable as a string via dmesg.


init/version.c is the only file that can depend on the output of
the 'date' command.


You can follow what 'linux_proc_banner' does.

Define it in init/version.c, and declare it somewhere in a header file.





> Best regards
>
> Florian



-- 
Best Regards
Masahiro Yamada