From: Michael Opdenacker <michael.opdenacker@rootcommit.com>
To: Ayoub Zaki <ayoub.zaki@googlemail.com>
Cc: Yocto-mailing-list <yocto@lists.yoctoproject.org>
Subject: Re: overlayfs-etc on top of dm-verity?
Date: Mon, 30 Mar 2026 16:51:33 +0000 (UTC) [thread overview]
Message-ID: <7870f639-0573-4656-9daf-180ccb3541eb@rootcommit.com> (raw)
In-Reply-To: <CA+-BmJbrTDW9bgT_RN6uEirtGMq4i6euR3JzvnDEhKwPT3DLbQ@mail.gmail.com>
Hi Ayoub,
On 3/27/26 2:26 PM, Ayoub Zaki wrote:
> Hi Michael,
> From a security perspective I would strongly advise against overlaying
> the entire /etc as it undermines the integrity provided by secure
> boot. Instead only overlay the specific files that actually need to be
> modified. In addition, consider enforcing integrity protection on the
> upper layer and consider alternatively switch to bind mounts for those
> files.
>
Thanks for the advice and reminder! This definitely makes sense and I'll
review which /etc files we need to modify, if any. I initially suggested
this to allow for changing root/user passwords at first boot, but we may
be able to do without users and passwords after all.
Cheers
Michael.
--
Root Commit
Embedded Linux Training and Consulting
https://rootcommit.com
next prev parent reply other threads:[~2026-03-30 16:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-27 13:26 overlayfs-etc on top of dm-verity? Ayoub Zaki
2026-03-30 16:51 ` Michael Opdenacker [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-03-25 21:20 Michael Opdenacker
2026-03-26 9:56 ` Michael Opdenacker
2026-03-26 17:41 ` Michael Opdenacker
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