From: Leif Lindholm <leif.lindholm-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
To: Steve McIntyre <steve-nt0JYOx6u4DQT0dZR+AlfA@public.gmane.org>
Cc: Matt Fleming
<matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>,
Peter Jones <pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 5/5] efi: Make efivarfs entries immutable by default.
Date: Wed, 3 Feb 2016 14:50:05 +0000 [thread overview]
Message-ID: <20160203145005.GH10351@bivouac.eciton.net> (raw)
In-Reply-To: <20160203141959.GA3319-nt0JYOx6u4DQT0dZR+AlfA@public.gmane.org>
On Wed, Feb 03, 2016 at 02:20:04PM +0000, Steve McIntyre wrote:
> On Wed, Feb 03, 2016 at 02:13:54PM +0000, Matt Fleming wrote:
> >On Wed, 03 Feb, at 08:02:47AM, Peter Jones wrote:
> >I see no mention of the benefit of using the immutable flag versus
> >making all protected files read-only.
> >
> >Is it not possible to just make everything that needs protecting 444?
> >That way users can use standard tools if they really, really want to
> >delete/write to a variable. It has the added benefit of protecting
> >users from trashing variables that are important for POST too (as
> >opposed to deleting them altogether).
>
> Just making them read-only won't stop people trashing things as
> root. They're already owned by root anyway aren't they??
The point is to stop people _accidentally_ triggering
brickness-inducing bugs in completely broken firmware.
This set achieves that.
> Although if we're at the stage of doing things this wat then is there
> much to be gained by having a filesystem interface in the first place?
These systems would be manually brickable regardless of what interface
you implemented, or under which operating system. Probably even from
the UEFI Shell.
/
Leif
next prev parent reply other threads:[~2016-02-03 14:50 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-03 13:02 [PATCH 1/5] Add ucs2 -> utf8 helper functions Peter Jones
[not found] ` <1454504567-2826-1-git-send-email-pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-02-03 13:02 ` [PATCH 2/5] efi: use ucs2_as_utf8 in efivarfs instead of open coding a bad version Peter Jones
[not found] ` <1454504567-2826-2-git-send-email-pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-02-03 16:42 ` Matt Fleming
[not found] ` <20160203164245.GA15385-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-02-03 16:55 ` [PATCH] efi: use ucs2_as_utf8 in efivarfs instead of open coding a bad version (v2) Peter Jones
2016-02-03 13:02 ` [PATCH 3/5] efi: do variable name validation tests in utf8 Peter Jones
2016-02-03 13:02 ` [PATCH 4/5] efi: make our variable validation list include the guid Peter Jones
2016-02-03 13:02 ` [PATCH 5/5] efi: Make efivarfs entries immutable by default Peter Jones
[not found] ` <1454504567-2826-5-git-send-email-pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-02-03 14:13 ` Matt Fleming
[not found] ` <20160203141354.GH2597-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-02-03 14:20 ` Steve McIntyre
[not found] ` <20160203141959.GA3319-nt0JYOx6u4DQT0dZR+AlfA@public.gmane.org>
2016-02-03 14:50 ` Leif Lindholm [this message]
[not found] ` <20160203145005.GH10351-t77nlHhSwNqAroYi2ySoxKxOck334EZe@public.gmane.org>
2016-02-03 14:56 ` Matt Fleming
[not found] ` <20160203145621.GI2597-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-02-03 15:00 ` Steve McIntyre
-- strict thread matches above, loose matches on Subject: below --
2016-02-12 11:27 [GIT PULL 0/5] EFI urgent fixes Matt Fleming
2016-02-12 11:27 ` [PATCH 5/5] efi: Make efivarfs entries immutable by default Matt Fleming
[not found] ` <1455276432-9931-6-git-send-email-matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-02-15 10:50 ` Matt Fleming
2016-02-02 22:33 Preventing "rm -rf /sys/firmware/efi/efivars/" from damage Peter Jones
[not found] ` <1454452386-27709-1-git-send-email-pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-02-02 22:33 ` [PATCH 5/5] efi: Make efivarfs entries immutable by default Peter Jones
[not found] ` <1454452386-27709-6-git-send-email-pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-02-03 13:16 ` Matt Fleming
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160203145005.GH10351@bivouac.eciton.net \
--to=leif.lindholm-qsej5fyqhm4dnm+yrofe0a@public.gmane.org \
--cc=linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org \
--cc=pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \
--cc=steve-nt0JYOx6u4DQT0dZR+AlfA@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).