linux-ext4 - [Bug 198923] New: Linux 4.15.4+: Write on Ext4 causes system block

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Message-ID: <bug-198923-13602@https.bugzilla.kernel.org/>
Date:   Sat, 24 Feb 2018 18:01:11 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...nel.org
Subject: [Bug 198923] New: Linux 4.15.4+: Write on Ext4 causes system block

https://bugzilla.kernel.org/show_bug.cgi?id=198923

            Bug ID: 198923
           Summary: Linux 4.15.4+: Write on Ext4 causes system block
           Product: File System
           Version: 2.5
    Kernel Version: 4.15.4
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: ext4
          Assignee: fs_ext4@...nel-bugs.osdl.org
          Reporter: mabo@...murf.de
        Regression: No

Created attachment 274437
  --> https://bugzilla.kernel.org/attachment.cgi?id=274437&action=edit
dmesg output on 4.16 RC2

Hello, I’m experiencing a bug, introduced with 4.15.4, which does block my
system  after a write attempt on my backup HDD, formatted in ext4. I can
reproduce this on 4.15.5 too. It is still present on 4.16 RC2 but there it
seems to only block applications accessing the drive, not all SATA I/O (but I’m
not quite sure).
In the attached log you’ll find a dmesg output, partition mount starts at line
1117, soon later, a write attempt is made. Just reading couldn’t trigger the
issue in my tests.

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