On Wed, Aug 24, 2022 at 06:03:11PM +0200, Ismael Luceno wrote:
> Otherwise the installation will fail, and the system will be left in an
> unbootable state.
>
> On ppc64le, the boot process shows:
>
> Welcome to GRUB!
>
> error: ../../grub-core/kern/dl.c:380:symbol `grub_disk_get_siz
The point of no return is used to define a point where no change should
be reverted in a wake of fatal error that consequently aborts the
process. The powerpc-ieee1275 install apparently missed this point of no
return defintion that newly installed modules could be inadvertently
reverted after succ
On Mon, Aug 29, 2022 at 04:36:24PM +0200, Ismael Luceno wrote:
> Signed-off-by: Ismael Luceno
> ---
> util/grub-install.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/util/grub-install.c b/util/grub-install.c
> index 7b04bd3c534b..527b85e27aa7 100644
> --- a/util/grub-install.c
> +
On Mon, Aug 29, 2022 at 04:36:25PM +0200, Ismael Luceno wrote:
> This enables an early failure; for i386-ieee1275 and powerpc-ieee1275 on
> Linux, without /dev/nvram the system may be left in an unbootable state.
>
> Signed-off-by: Ismael Luceno
> ---
> util/grub-install.c | 23 +
This helps to prevent out of memory error when reading large files via disablig
tpm device as verifier has to read all content into memory in one chunk to
measure the hash and extend to tpm.
Signed-off-by: Michael Chang
---
grub-core/commands/efi/tpm.c | 37
This helps to prevent out of memory error when reading large files via disabling
tpm device as verifier has to read all content into memory in one chunk to
measure the hash and extend to tpm.
Signed-off-by: Michael Chang
Reviewed-by: Stefan Berger
---
grub-core/commands/efi/tpm.c | 37 +
On Thu, Oct 06, 2022 at 03:40:36PM -0400, Stefan Berger wrote:
>
>
> On 9/8/22 00:23, Michael Chang via Grub-devel wrote:
> > This helps to prevent out of memory error when reading large files via
> > disablig
> > tpm device as verifier has to read all content
On Fri, Oct 14, 2022 at 11:40:01AM +0200, Daniel Kiper wrote:
> On Fri, Oct 07, 2022 at 01:37:10PM +0800, Michael Chang via Grub-devel wrote:
> > This helps to prevent out of memory error when reading large files via
> > disabling
> > tpm device as verifier has to read all c
On Tue, Oct 18, 2022 at 04:18:21PM +0200, Olaf Hering wrote:
> Tue, 18 Oct 2022 06:57:36 -0700 Denton Liu :
>
> > If I'm understanding correctly, what you're proposing is a mechanism for
> > setting the default entry. If I'm not mistaken, this seems like an
> > orthogonal discussion to me. My patc
Dear Daniel,
On Wed, Oct 26, 2022 at 04:52:09PM +0200, Daniel Kiper wrote:
> Hi,
>
> We are getting closer to the 2.12 release. Sadly we still do not have
> many of important patch sets in the tree. So, I am going to spend more
> time on reviews in the following weeks. Below you can find my list
On Thu, Nov 24, 2022 at 05:04:48PM +0100, Daniel Kiper wrote:
> On Mon, Oct 17, 2022 at 01:19:08PM +0800, Michael Chang via Grub-devel wrote:
> > On Fri, Oct 14, 2022 at 11:40:01AM +0200, Daniel Kiper wrote:
> > > On Fri, Oct 07, 2022 at 01:37:10PM +0800, Michael Chang via Grub-
On Tue, Nov 29, 2022 at 03:24:51PM -0500, Robbie Harwood wrote:
> Steve McIntyre writes:
>
> > Hey folks!
> >
> > So, with the latest set of GRUB CVE patches we've fixed up a bunch of
> > potential crashes in font-handling code that could lead to Secure Boot
> > holes. These are good and useful f
On Tue, Dec 06, 2022 at 11:09:57AM -0500, Robbie Harwood wrote:
> Zhang Boyang writes:
>
> > Since font files can be wrapped as PE images by grub-wrap, use shim to
> > verify font files if Secure Boot is enabled. To prevent other PE files
> > (e.g. kernel images) used as wrappers, it only allows
On Thu, Feb 16, 2023 at 01:02:00PM -0500, Stefan Berger wrote:
>
>
> On 10/7/22 01:37, Michael Chang via Grub-devel wrote:
> > This helps to prevent out of memory error when reading large files via
> > disabling
> > tpm device as verifier has to read all content
On Tue, Nov 29, 2022 at 04:11:48PM +0100, Daniel Kiper wrote:
> On Fri, Nov 25, 2022 at 03:00:48PM +0800, Michael Chang via Grub-devel wrote:
> > On Thu, Nov 24, 2022 at 05:04:48PM +0100, Daniel Kiper wrote:
> > > On Mon, Oct 17, 2022 at 01:19:08PM +0800, Michael Chang via Grub-
This helps to prevent out of memory error when reading large files via
disabling tpm device as verifier has to read all content into memory in
one chunk to measure the hash and extend to tpm.
For ibmvtpm driver support this change here would be needed. It helps to
prevent much memory consuming tpm
On Thu, Feb 23, 2023 at 02:22:27PM +0100, Daniel Kiper wrote:
> Adding James, Stefan and Robbie...
>
> On Mon, Feb 20, 2023 at 12:57:01PM +0800, Michael Chang via Grub-devel wrote:
> > On Tue, Nov 29, 2022 at 04:11:48PM +0100, Daniel Kiper wrote:
> > > On Fri, Nov 25,
The gcc build has failed for 32bit host (for eg, i386-emu and arm-emu)
due to mismatch between format specifier and data type.
../grub-core/osdep/devmapper/getroot.c: In function
'grub_util_pull_devmapper':
../grub-core/osdep/devmapper/getroot.c:265:75: error: format '%lu'
expects argument of typ
On Thu, Mar 02, 2023 at 07:59:00PM +0100, Daniel Kiper wrote:
> On Tue, Feb 28, 2023 at 11:22:14AM +0800, Michael Chang via Grub-devel wrote:
> > On Thu, Feb 23, 2023 at 02:22:27PM +0100, Daniel Kiper wrote:
> > > Adding James, Stefan and Robbie...
> > >
> > >
On Fri, Mar 03, 2023 at 07:19:56PM +0100, Daniel Kiper wrote:
> On Fri, Mar 03, 2023 at 12:18:19PM +0800, Michael Chang wrote:
> > On Thu, Mar 02, 2023 at 07:59:00PM +0100, Daniel Kiper wrote:
> > > On Tue, Feb 28, 2023 at 11:22:14AM +0800, Michael Chang via Grub-devel
> >
On Mon, Mar 06, 2023 at 04:22:53PM -0800, Atish Patra wrote:
> On Mon, Mar 6, 2023 at 1:25 PM Fabian Vogt wrote:
> >
> > Hi,
> >
> > Am Montag, 6. März 2023, 21:59:23 CET schrieb Daniel Kiper:
> > > Adding Gary and Michael...
> > >
> > > Gary, Michael, could you help with this? Or at least forward
On Thu, Mar 09, 2023 at 02:10:54AM -0800, Atish Patra wrote:
> On Mon, Mar 6, 2023 at 7:21 PM Michael Chang wrote:
> >
> > On Mon, Mar 06, 2023 at 04:22:53PM -0800, Atish Patra wrote:
> > > On Mon, Mar 6, 2023 at 1:25 PM Fabian Vogt wrote:
> > > >
> > > > Hi,
> > > >
> > > > Am Montag, 6. März 20
On Fri, Mar 10, 2023 at 01:15:40PM +0800, Michael Chang via Grub-devel wrote:
> On Thu, Mar 09, 2023 at 02:10:54AM -0800, Atish Patra wrote:
> > On Mon, Mar 6, 2023 at 7:21 PM Michael Chang wrote:
[snip]
> > I have a small favor to ask. Is it possible for you to test out the
&g
On Mon, Mar 13, 2023 at 02:29:41PM +0100, Daniel Kiper wrote:
> On Mon, Feb 20, 2023 at 02:36:18PM +0800, Michael Chang via Grub-devel wrote:
> > This helps to prevent out of memory error when reading large files via
> > disabling tpm device as verifier has to read all content
When the TPM module is loaded, the verifier reads the entire file into
memory, measures and extends the hash, and uses the verified content as
a backing buffer for disk files. However, this process can result in a
high memory utilization cost per file operation, sometimes causing the
system to run
When the TPM module is loaded, the verifier reads the entire file into
memory, measures and extends the hash, and uses the verified content as
a backing buffer for disk files. However, this process can result in a
high memory utilization cost per file operation, sometimes causing the
system to run
On Tue, Mar 21, 2023 at 03:35:33PM +0100, Daniel Kiper wrote:
> On Mon, Mar 20, 2023 at 06:18:26PM +0800, Michael Chang via Grub-devel wrote:
> > When the TPM module is loaded, the verifier reads the entire file into
> > memory, measures and extends the hash, and uses the verified c
On Tue, Mar 28, 2023 at 11:00:01AM +0530, Mukesh Kumar Chaurasiya wrote:
> Sometimes, when booting from a very busy SAN, the access to the
> disk can fail and then grub will eventually drop to grub prompt.
> This scenario is more frequent when deploying many machines at
> the same time using the sa
On Thu, Aug 17, 2023 at 10:52:58AM +0200, Olaf Hering wrote:
> Prior commit 3cf2e848bc03 ("disk/cryptodisk: Allows UUIDs to be compared
> in a dash-insensitive manner") the grub.cfg below worked as expected:
> create a menu, which if selected tries to open the specified partition
> and does further
During attempts to configure a serial console, a Page Fault Exception
and system reset were encountered, specifically on release 2.12-rc1.
This issue was not present in prior versions and seemed to affect only a
specific machine, potentially pointing to hardware or firmware flaw.
After investigati
The add_tar_files() function currently iterates through a directory's
content using readdir(), which doesn't guarantee a specific order. This
lack of deterministic behavior impacts reproducibility in the build
process.
This commit resolves the issue by introducing sorting functionality. The
list r
This change mirrors a previous fix [1] but is specific to images
generated by grub-mkstandalone.
The former fix (85a7be241) focused on utilizing a stable timestamp
during binary generation in the util/mkimage context. This commit
extends that approach to the images produced by grub-mkstandalone,
e
Enclosed is the description from openSUSE bugzilla entry:
While working on reproducible builds for openSUSE, I found that our
grub2 package's /usr/share/grub2/x86_64-xen/grub.xen varies across
builds.
I identified 2 issues: The tar contains changing (octal) mtime values.
The tar stores files in r
On Fri, Jan 12, 2024 at 05:58:02PM +0100, Itxaka serrano wrote:
> Hey all,
>
> I opened a bug because this behaviour doesnt seem correct to me:
>
> https://savannah.gnu.org/bugs/?65154
>
>
> Example:
>
> grub> hello
> error: ../../grub-core/script/function.c:119:can't find command `hello'.
> g
On Wed, Jan 24, 2024 at 11:42:30AM +0530, Mukesh Kumar Chaurasiya wrote:
> Sometimes, when booting from a very busy SAN, the access to the
> disk can fail and then GRUB will eventually drop to GRUB prompt.
> This scenario is more frequent when deploying many machines at
> the same time using the sa
On Mon, Oct 07, 2024 at 12:20:55PM GMT, Leo Sandoval wrote:
> From: Michael Chang
>
> Implement new net_bootp6 command for IPv6 network auto configuration via the
> DHCPv6 protocol (RFC3315).
This would have marked the fourth attempt to upstream the patch by
different people.
https://lists.gnu.
On Tue, Oct 08, 2024 at 10:14:59AM GMT, Vladimir 'phcoder' Serbinenko wrote:
> Le mar. 8 oct. 2024, 09:53, Michael Chang via Grub-devel
> a écrit :
>
> > On Tue, Oct 08, 2024 at 08:07:17AM GMT, Vladimir 'phcoder' Serbinenko
> > wrote:
> > > Agai
On Thu, Oct 10, 2024 at 03:43:26PM GMT, Leo Sandoval wrote:
> From: Paulo Flabiano Smorigo
>
> This patch makes grub look for its config file on efi where the app was
> found. It was originally written by Matthew Garrett, and adapted to fix the
> "No modules are loaded on grub2 network boot" issu
On Sat, Oct 12, 2024 at 10:51:09AM GMT, Neal Gompa wrote:
> On Fri, Oct 11, 2024 at 6:40 PM Leo Sandoval wrote:
> >
> > From: Michael Chang
> >
> > Signed-off-by: Michael Chang
> > Signed-off-by: Robbie Harwood
>
> This needs a real commit message describing what this does. Please
> work with
Previously, the buffer for LVM metadata parsing was set to twice the
size of the metadata area, which caused excessive memory use.
This patch changes the allocation to read the actual raw metadata blocks
directly from the metadata area. Instead of using twice the entire
metadata area size, we now
On Mon, Oct 07, 2024 at 11:49:51AM GMT, ross.philip...@oracle.com wrote:
> On 10/3/24 8:40 PM, Michael Chang via Grub-devel wrote:
> > On Thu, Oct 03, 2024 at 10:30:15AM GMT, ross.philip...@oracle.com wrote:
> > > On 10/3/24 12:23 AM, Michael Chang via Grub-devel wrote:
>
On Fri, Oct 18, 2024 at 08:08:28AM GMT, zhangqiumiao wrote:
> > On Thu, Oct 03, 2024 at 03:23:15PM +0800, Michael Chang via Grub-devel
> > wrote:
> >> Similar to the fix in commit "c52ae4057 efinet: skip virtual IPv4 and
> >> IPv6 devices during card enumer
On Fri, Oct 18, 2024 at 08:39:01PM GMT, Vladimir 'phcoder' Serbinenko wrote:
> Le lun. 14 oct. 2024, 20:10, Leo Sandoval a écrit :
>
> > From: Jeff Mahoney
> >
> > This patch adds the ability to specify a different root on a btrfs
> > filesystem too boot from other than the default one.
> >
> Do
On Sat, Oct 19, 2024 at 01:32:12PM GMT, Vladimir 'phcoder' Serbinenko wrote:
> What if I put /boot and /boot/grub in different sub volumes? How do I set
> variables then in order to correctly load additional modules from $prefix
> and yet load correct kernels? This convoy is needed in order to load
On Tue, Oct 08, 2024 at 08:07:17AM GMT, Vladimir 'phcoder' Serbinenko wrote:
> Again, what do you try to achieve? Why aren't absolute paths enough?
The absolute path does not align with the default subvolume. As a
result, after running btrfs set-default , the system does not
boot the new default s
On Mon, Oct 07, 2024 at 09:40:40PM GMT, Vladimir 'phcoder' Serbinenko wrote:
> What do you try to achieve with this that can't be achieved with using full
> path? We should avoid using hidden state for directory parsing. Solaris
> GRUB legacy used it for ZFS and it was a mess.
If a path is relativ
On Thu, Oct 03, 2024 at 09:17:46PM GMT, Askar Safin wrote:
> On Thu, 03 Oct 2024 11:23:08 +0400 Michael Chang via Grub-devel wrote
> ---
> > A regression in grub 2.12 causes the grub screen to become cluttered
>
> I just tested. Your patch doesn't fix anything
On Thu, Oct 03, 2024 at 10:30:15AM GMT, ross.philip...@oracle.com wrote:
> On 10/3/24 12:23 AM, Michael Chang via Grub-devel wrote:
> > Previously, the buffer for LVM metadata parsing was set to twice the
> > size of the metadata area, which caused excessive memory use.
> >
&
The "cmdpath" environment variable is set at startup to the location
from which the grub image is loaded. It includes a device part and,
optionally, an absolute directory name if the grub image is booted as a
file in a local file-system directory, or in a remote server directory,
like TFTP.
This e
On Wed, Oct 30, 2024 at 05:12:48PM GMT, Daniel Kiper wrote:
> Adding Leo...
>
> On Tue, Oct 29, 2024 at 03:57:18PM +0800, Michael Chang via Grub-devel wrote:
> > The "cmdpath" environment variable is set at startup to the location
> > from which the grub image is lo
Previously, the buffer for LVM metadata parsing was set to twice the
size of the metadata area, which caused excessive memory use.
This patch changes the allocation to read the actual raw metadata blocks
directly from the metadata area. Instead of using twice the entire
metadata area size, we now
A regression in grub 2.12 causes the grub screen to become cluttered
with artifacts from the previous screen, whether it's the UEFI post ui,
UEFI shell, or any graphical UI running before grub. this issue occurs
in situations like booting grub from the UEFI shell and going straight
to the rescue or
The loopback image is configured to function as a disk by being mapped
as a block device. Instead of measuring the entire block device, we
should focus on tracking the individual files accessed from it. For
example, we do not directly measure block devices like disk hd0, but the
files opened from i
Similar to the fix in commit "c52ae4057 efinet: skip virtual IPv4 and
IPv6 devices during card enumeration", the UEFI PXE driver creates
additional VLAN child devices when a VLAN ID is configured on a network
interface associated with a physical NIC. These virtual VLAN devices
must be skipped durin
On Mon, Nov 04, 2024 at 07:15:33PM GMT, Daniel Kiper wrote:
> On Fri, Nov 01, 2024 at 10:03:16AM +0800, Michael Chang wrote:
> > On Wed, Oct 30, 2024 at 05:12:48PM GMT, Daniel Kiper wrote:
> > > Adding Leo...
> > >
> > > On Tue, Oct 29, 2024 at 03:57:18PM
On Wed, Jan 15, 2025 at 05:46:05PM +0530, Avnish Chouhan wrote:
> Change RMA size from 512 MB to 768 MB which will result
> in more memory at boot time for PowerPC. When PowerPC LPAR use/uses vTPM,
> Secure Boot or FADump, the 512 MB RMA memory is not sufficient for
> booting. With this 512 MB RMA,
Implement a new net_dhcp6 command for IPv6 network auto-configuration
using the DHCPv6 protocol (RFC3315). This command is renamed from
net_bootp6, which has been used in downstream patches for a long time
prior to the addition of the DHCPv4 feature. The net_bootp6 command is
retained for backward
Signed-off-by: Michael Chang
---
grub-core/kern/efi/efi.c | 37 +
1 file changed, 37 insertions(+)
diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index b93ae3aba..2997ab721 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
The PXE Base Code protocol, which was previously used to obtain the
cached PXE DHCPACK packet, is no longer available for HTTP Boot. HTTP
boot configuration must now be retrieved from the device path nodes
defined in the following UEFI Specification sections:
9.3.5.12 IPv4 Device Path
9.3.
The vendor class identifier with the string "HTTPClient" is used to
indicate that the packet is responding to an HTTP boot request. In the
DHCPv4 configuration, the boot_file for HTTP boot specifies the URL of
the boot file, while for PXE boot, it specifies the path to the boot
file. Consequently,
From: Robbie Harwood
Co-authored-by: Peter Jones
Signed-off-by: Peter Jones
Signed-off-by: Robbie Harwood
Signed-off-by: Michael Chang
---
grub-core/net/http.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/grub-core/net/http.c b/grub-core/net/http.c
index f389bf03d..
This patch series extends GRUB's network boot capabilities to support
the following UEFI network boot functions:
- UEFI PXE with IPv6 support
- UEFI HTTP with IPv4 and IPv6 support
- UEFI HTTP with DNS resolution
Although GRUB already supports TFTP, HTTP, and DNS, it previously lacked
the integra
Update grub documentation for net_dhcp6 command.
Signed-off-by: Michael Chang
Signed-off-by: Ken Lin
Signed-off-by: Robbie Harwood
---
docs/grub.texi | 30 ++
1 file changed, 30 insertions(+)
diff --git a/docs/grub.texi b/docs/grub.texi
index 200e747af..50a779d11 1
From: Robbie Harwood
When a GRUB2 image is booted from UEFI IPv6 PXE, the DHCPv6 Reply packet
is cached in the firmware buffer and can be retrieved via the PXE Base
Code protocol. The network interface can then be configured using the
parameters from the retrieved packet.
Augment existing struct
In the URI device path node, any string of characters (i.e., a name),
rather than a network address, can be used to look up resources. This
requires DNS services to resolve the name to an IP address. However,
since the DNS device path requires a later UEFI version and may not
always be available, w
Signed-off-by: Michael Chang
---
grub-core/kern/efi/efi.c | 32
1 file changed, 16 insertions(+), 16 deletions(-)
diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index 2997ab721..122adf267 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/ker
Signed-off-by: Michael Chang
---
grub-core/net/bootp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/grub-core/net/bootp.c b/grub-core/net/bootp.c
index 8bf0ca782..0bfa3d185 100644
--- a/grub-core/net/bootp.c
+++ b/grub-core/net/bootp.c
@@ -379,7 +379,7 @@ grub_net_configure
In XFS, the system would end up in unbootable state if an abrupt power
off after grub-install is occuring. It can be easily reproduced with.
grub-install /dev/vda; reboot -f
The grub error would show many different kinds of corruption in
filesystem and the problem boils down to incompleted jour
On Tue, Jan 21, 2025 at 07:41:03AM +0100, Pascal Hambourg wrote:
> Le 21/01/2025 à 07:25, Michael Chang via Grub-devel a écrit :
> > In XFS, the system would end up in unbootable state if an abrupt power
> > off after grub-install is occuring. It can be easily reproduced with.
&
Hi Avnish,
This patch doesn't build:
../grub-core/osdep/linux/ofpath.c: In function ‘of_path_of_nvme’:
../grub-core/osdep/linux/ofpath.c:729:37: error: ‘%x’ directive output may be
truncated writing between 1 and 8 bytes into a region of size 7
[-Werror=format-truncation=]
729 |
On Thu, Feb 20, 2025 at 12:27:12PM +0100, Tobias Powalowski via Grub-devel
wrote:
> Hi Daniel,
>
> according to my unanswered mail 2 days ago, we tried to bump grub to latest
> git snapshot.
>
> It failed for my co-maintainer in 2 cases:
>
> - loopback device seems to be broken
Is the loopback
Previously, the number of extent entries was not properly capped based
on the actual available space. This could lead to insufficient reads for
external extents, since the computation was based solely on the inline
extent layout.
In this patch, when processing the extent header, we determine wheth
Hi
Unfortunately this fix did not go through and may cause issues when
reading larger files, such as the initial ramdisk. I have posted a new
patch in the hope that the problem will be correctly addressed this
time.
Sorry for the trouble.
Michael
On Tue, Feb 18, 2025 at 07:00:20PM +0100, Daniel
On Fri, Feb 21, 2025 at 10:01:11AM +0100, Christian Hesse wrote:
> Michael Chang via Grub-devel on Fri, 2025/02/21 15:55:
> > On Thu, Feb 20, 2025 at 12:27:12PM +0100, Tobias Powalowski via Grub-devel
> > wrote:
> > > It failed for my co-maintainer in 2 cases:
> > &g
On Mon, Mar 10, 2025 at 09:12:22AM +, Mate Kukri wrote:
> - Use shim loader protocol to verify images in the shim_lock verifier.
This change makes the shim loader protocol mandatory for GRUB under UEFI
Secure Boot. However, I don't think this is a good idea, since the new
protocol is only avai
On Tue, Apr 01, 2025 at 11:26:42AM +0100, Mate Kukri wrote:
> Use loader protocol for image verification where available, otherwise
> fall back to the old shim lock protocol.
>
> Signed-off-by: Mate Kukri
> ---
> grub-core/kern/efi/sb.c | 58
> grub-core
Hi Subhakar,
Thanks for the review.
On Fri, Jul 11, 2025 at 11:17:00AM +0530, Sudhakar Kuppusamy wrote:
>
>
> > On 11 Jul 2025, at 9:37 AM, Michael Chang via Grub-devel
> > wrote:
> >
> > GRUB's TCP stack assigns source ports for outgoing connections s
GRUB's TCP stack assigns source ports for outgoing connections starting
at 21550 and increments sequentially by 1 (e.g., 21550, 21551, ...).
While this generally works, it can lead to failures if the system
reboots rapidly and reuses the same source port too soon.
This issue was observed on powerp
GRUB's TCP stack assigns source ports for outgoing connections starting
at 21550 and increments sequentially by 1 (e.g., 21550, 21551, ...).
While this generally works, it can lead to failures if the system
reboots rapidly and reuses the same source port too soon.
This issue was observed on powerp
On Btrfs, GRUB cannot update the environment block (grubenv) because
file based writes via blocklists are incompatible with Btrfs COW (Copy
On Write) design. Although GRUB’s filesystem drivers are read only,
environment updates rely on raw block access to fixed locations, which
is not safe on Btrfs
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