Re: why is os-prober disabled by default
On 15/07/2023 01:32, digitalmailing wrote: Is there a reason why GRUB_DISABLE_OS_PROBER=false in /etc/default/grub is commented by default after installation of bookworm or grub? After posting some links and references to Debian bugs in Re: os-prober Just a Rant. Fri, 26 May 2023 09:38:37 +0700. https://lists.debian.org/msgid-search/u4p63e$103m$1...@ciao.gmane.io I have noticed the following: https://www.debian.org/devel/debian-installer/News/2023/20230428 Debian Installer Bookworm RC 2 release April 28th, 2023 grub-installer: - If we detect other operating systems installed, check with the user (at low priority) and re-enable os-prober. So I am curious if it has been reverted later or it is the part of the release. Perhaps the same logic may be implemented in package upgrade scripts.
Re: why is os-prober disabled by default
On Fri 14 Jul 2023 at 21:41:39 +0300, Teemu Likonen wrote: > * 2023-07-14 20:32:41+0200, digitalmail...@gmx.de wrote: > > > Is there a reason why GRUB_DISABLE_OS_PROBER=false in > > /etc/default/grub is commented by default after installation of > > bookworm or grub? > > Yes. Release notes document tells about it briefly: > > 5.1.11. GRUB no longer runs os-prober by default > > For a long time, grub has used the os-prober package to detect other > operating systems installed on a computer so that it can add them to > the boot menu. Unfortunately, that can be problematic in certain > cases (e.g. where guest virtual machines are running), so this has > now been disabled by default in the latest upstream release. > > https://www.debian.org/releases/stable/amd64/release-notes/ch-information.en.html#grub-os-prober Most Debian users experience of guest virtual machines is likely to be minimal, so the impact of having GRUB_DISABLE_OS_PROBER=false falls on the majority. The change is is an upstream one and Debian tends not to go against such changes. This is the likely reason for not altering what upstream has determined. The reason for upstream's decision appears to be: os-prober is inherently insecure as it mounts all partitions on your disk using grub-mount to check them for other OS, which is not a nice thing to do as root as you can exploit bugs in the filesystem code easily. -- Brian
Re: why is os-prober disabled by default
Hi, On Fri, Jul 14, 2023 at 08:32:41PM +0200, digitalmailing wrote: > I find this very annoying and inconvenient to change > [GRUB_DISABLE_OS_PROBER] back again after some updates. Others have explained the "why". To stop your changes being overwritten you can re-enable it in a .cfg file in /etc/default/grub.d/. Cheers, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting
Re: why is os-prober disabled by default
digitalmailing wrote: > Is there a reason why GRUB_DISABLE_OS_PROBER=false > in /etc/default/grub is commented by default after > installation of bookworm or grub? Yes. It's a new change, mentioned in the upgrade notes. https://www.debian.org/releases/bookworm/amd64/release-notes/ch-information.en.html#grub-os-prober -dsr-
Re: why is os-prober disabled by default
* 2023-07-14 20:32:41+0200, digitalmail...@gmx.de wrote: > Is there a reason why GRUB_DISABLE_OS_PROBER=false in > /etc/default/grub is commented by default after installation of > bookworm or grub? Yes. Release notes document tells about it briefly: 5.1.11. GRUB no longer runs os-prober by default For a long time, grub has used the os-prober package to detect other operating systems installed on a computer so that it can add them to the boot menu. Unfortunately, that can be problematic in certain cases (e.g. where guest virtual machines are running), so this has now been disabled by default in the latest upstream release. https://www.debian.org/releases/stable/amd64/release-notes/ch-information.en.html#grub-os-prober -- /// Teemu Likonen - .-.. https://www.iki.fi/tlikonen/ // OpenPGP: 6965F03973F0D4CA22B9410F0F2CAE0E07608462 signature.asc Description: PGP signature
