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From:   Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Date:   Sat, 18 May 2019 11:44:28 +0500
Message-ID: <CABXGCsNPMSQgBjnFarYaxuQEGpA1G=U4U9OHqT0E53pNL2BK8g@mail.gmail.com>
Subject: [bugreport] kernel 5.2 pblk bad header/extent: invalid extent entries
To:     Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        linux-ext4@vger.kernel.org
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Hi folks.
Yesterday I updated kernel to 5.2 (git commit 7e9890a3500d)
I always leave computer working at night.
Today at morning I am found that computer are hanged.
I was connect via ssh and look at kernel log.
There I had seen strange records which I never seen before:

[28616.429757] EXT4-fs error (device nvme0n1p2): ext4_find_extent:908:
inode #8: comm jbd2/nvme0n1p2-: pblk 23101439 bad header/extent:
invalid extent entries - magic f30a, entries 8, max 340(340), depth
0(0)
[28616.430602] jbd2_journal_bmap: journal block not found at offset
4383 on nvme0n1p2-8
[28616.430610] Aborting journal on device nvme0n1p2-8.
[28616.432474] EXT4-fs error (device nvme0n1p2):
ext4_journal_check_start:61: Detected aborted journal
[28616.432489] EXT4-fs error (device nvme0n1p2):
ext4_journal_check_start:61: Detected aborted journal
[28616.432551] EXT4-fs (nvme0n1p2): Remounting filesystem read-only
[28616.432690] EXT4-fs (nvme0n1p2): ext4_writepages: jbd2_start:
9223372036854775791 pages, ino 3285789; err -30
[28616.432692] EXT4-fs error (device nvme0n1p2):
ext4_journal_check_start:61: Detected aborted journal

After reboot computer and running fsck system looks like working.
But I am afraid that it could happens again and I may lost all my data.

How safe this error and what does it mean?
It a bug of kernel 5.2 or not?

--
Best Regards,
Mike Gavrilov.