Bug#1021846: [programmer11180 at programist.ru: Bug#1021846: grub-install is broken since 2.06-3: error: unknown filesystem]

[Steve McIntyre]

Hi all!

программист некто (in CC) reported this bug a few weeks back in
Debian. Since I applied the bundle of filesystem bounds-checking fixes
a few months back, he can't run grub-install. He's done the work to
determine that the patch that breaks things for him is

2d014248d540c7e087934a94b6e7a2aa7fc2c704 fs/f2fs: Do not read past the end of nat journal entries

The full thread of our discussion is at https://bugs.debian.org/1021846

I don't have any knowledge of f2fs to go any further here. Help please! :-)

----- Forwarded message from программист некто <programmer11180 at programist.ru> -----

From: программист некто <programmer11180 at programist.ru>
To: submit at bugs.debian.org
Date: Sat, 15 Oct 2022 23:54:36 +0300
Subject: Bug#1021846: grub-install is broken since 2.06-3: error: unknown filesystem
Message-Id: <3168731665867229 at wf4nrjvtssjecb53.iva.yp-c.yandex.net>

Package: grub-pc
Version: 2.06-3~deb11u1
Severity: critical

Hello. Since version 2.06-3, grub-install is broken: it fails with "error: unknown filesystem".
I test command /usr/sbin/grub-install -v /dev/sda
in some versions. Results in mail attachments.
Versions older than 2.06-3 works without error (2.06-2 and lower).
Tested versions: 2.04-20, 2.06-1, 2.06-2, 2.06-3~deb10u1, 2.06-3~deb11u1, 2.06-4.

Disk partitions:

# fdisk --list-details
Disk /dev/sda: 29,82 GiB, 32017047552 bytes, 62533296 sectors
Disk model: TS32GSSD370S
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xc7177f7e

Device Boot Start End Sectors Id Type Start-C/H/S End-C/H/S Attrs
/dev/sda1 2048 22763519 22761472 83 Linux 4/4/1 1023/254/2
/dev/sda2 * 25866240 62531583 36665344 7 HPFS/ 1023/254/2 1023/254/2 80

$ disktype /dev/sda1
--- /dev/sda1
Block device, size 10.85 GiB (11653873664 bytes)
F2FS file system (version 1.14)

$ disktype /dev/sda2
--- /dev/sda2
Block device, size 17.48 GiB (18772656128 bytes)
NTFS file system
Volume size 17.48 GiB (18772652032 bytes, 36665336 sectors)








----- End forwarded message -----
-- 
Steve McIntyre, Cambridge, UK.                                steve at einval.com
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