linux-ext4 - [Bug 197069] New: systemd service with ProtectHome=yes causes ELOOP when accessing /home

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Message-ID: <bug-197069-13602@https.bugzilla.kernel.org/>
Date:   Thu, 28 Sep 2017 20:17:05 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...nel.org
Subject: [Bug 197069] New: systemd service with ProtectHome=yes causes ELOOP
 when accessing /home

https://bugzilla.kernel.org/show_bug.cgi?id=197069

            Bug ID: 197069
           Summary: systemd service with ProtectHome=yes causes ELOOP when
                    accessing /home
           Product: File System
           Version: 2.5
    Kernel Version: kernel-lt 4.4 and 4.9 series
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: ext4
          Assignee: fs_ext4@...nel-bugs.osdl.org
          Reporter: xxjack12xx@...il.com
        Regression: No

Description of problem:
Having ProtectHome=yes in any service file causes a symlinked or autofs mounted
/home directory to return ELOOP
ls: cannot open directory /home: Too many levels of symbolic links

Version-Release number of selected component (if applicable):
Red Hat 7.0+

How reproducible:
1. Start a service with ProtectHome=yes
2. Start autofs with /home automounted
3. Access to /home returns ELOOP
ls: cannot open directory /home: Too many levels of symbolic links

Additional info:
This Fedora bug report describes the issue.
https://bugzilla.redhat.com/show_bug.cgi?id=1444223

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