linux-ext4 - Problem in updating UUID in ext4 FS on block device

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <CAG-6nk9hZUxDERrjbvwUReGtepnQA5bNWeNPyVa9x_+WCQ2W9w@mail.gmail.com>
Date:   Mon, 15 Jun 2020 22:24:33 +0530
From:   Alok Jain <jain.alok103@...il.com>
To:     linux-ext4@...r.kernel.org
Subject: Problem in updating UUID in ext4 FS on block device

Hi Expert,

 I am facing issue when I updated the block device UUID (ext4 file
system,  command: tune2fs -U random /dev/sdX1) and remount the FS,
sometime below error is coming while mounting the device.

 wrong fs type, bad option, bad superblock on /dev/sde1,
 missing codepage or helper program, or other error
 In some cases useful info is found in syslog - try
 dmesg | tail  or so

  I had to run fsck utility to fix the corrupt superblock which update
the UUID back to original value, looks like UUID is not getting
updated in all the superblocks.

Any idea how to replicate UUID to all the superblock? and also check
if it got replicated properly

Thanks in advance!
Alok