linux-ext4 - ext4 e2fsck error interpretation and howto fix? expecting 249045418 actual extent phys 249045427 log 1 len 2

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Date: Thu, 4 Apr 2024 18:23:44 -0400
From: Hanasaki Jiji <hanasaki@...il.com>
To: linux-ext4@...r.kernel.org
Subject: ext4 e2fsck error interpretation and howto fix? expecting 249045418
 actual extent phys 249045427 log 1 len 2

Hello all,

I have an ext4 filesystem with e2fsck reporting many of the below
lines.  Neither e2fsck nor fsck fix the issue.
Repeated runs result in the same errors.

kernel version = linux-image-6.1.0-18-amd64 / Debian Bookworm

Your help understanding the output and help fixing are very much appreciated.

Thank you,

==== e2fsck output ====
62264184(d): expecting 249045418 actual extent phys 249045427 log 1 len 2
62264185(d): expecting 249045419 actual extent phys 249045429 log 1 len 2
62266954(d): expecting 249045453 actual extent phys 249045486 log 1 len 3
...
/dev/...: ***** FILE SYSTEM WAS MODIFIED *****

     5123698 inodes used (8.01%, out of 64004096)
        3791 non-contiguous files (0.1%)
        3725 non-contiguous directories (0.1%)
             # of inodes with ind/dind/tind blocks: 0/0/0
             Extent depth histogram: 5112072/403
...