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  1. RHEL
  2. RHEL-11238

libdnf may create /run/user/0 directory, causing a bad context to be applied, leading to further issues

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    • rhel-9.4
    • rhel-9.3.0
    • libdnf
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    • libdnf-0.69.0-8.el9
    • Major
    • sst_cs_software_management
    • ssg_core_services
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    • 22
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    • Bug Fix
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      .`systemd` now correctly manages the `/run/user/0` directory created by `libdnf`

      Previously, if the `libdnf` functions were called from an Insights client before logging in root, the `/run/user/0` directory could be created with a wrong SELinux context type. This prevented `systemd` from cleaning the directory after you logged out from root.

      With this update, the `libdnf` package now sets a default creation type according to default file system labeling rules defined in a SELinux policy. As a result, `systemd` now correctly manages the `/run/user/0` directory created by `libdnf`.
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      .`systemd` now correctly manages the `/run/user/0` directory created by `libdnf` Previously, if the `libdnf` functions were called from an Insights client before logging in root, the `/run/user/0` directory could be created with a wrong SELinux context type. This prevented `systemd` from cleaning the directory after you logged out from root. With this update, the `libdnf` package now sets a default creation type according to default file system labeling rules defined in a SELinux policy. As a result, `systemd` now correctly manages the `/run/user/0` directory created by `libdnf`.
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      Description of problem:

      This is observed on a customer system when insights-client executes.
      In this specific case (but there are likely other cases), the /run/user/0 directory gets created with insights_client_tmp_t context, causing systemd's user-runtime-dir@0.service unit to fail forever:

      Aug 08 13:24:22 vm-insights8 systemd[1]: Stopping User runtime directory /run/user/0...
      Aug 08 13:24:22 vm-insights8 systemd-user-runtime-dir[34749]: Failed to remove runtime directory /run/user/0 (after unmounting): Permission denied
      Aug 08 13:24:22 vm-insights8 systemd[1]: user-runtime-dir@0.service: Control process exited, code=exited status=1
      Aug 08 13:24:22 vm-insights8 systemd[1]: user-runtime-dir@0.service: Failed with result 'exit-code'.
      

      The root cause for this is the libdnf code forcibly creates the /run/user/0 directory when trying to import GPG keys in ensure_socket_dir_exists() function.

      [...]

      Not creating this directory is the only reliable solution to make sure whatever the caller is, this will work.

      RHEL 9 is also affected:
      gnupg2-2.3.3-4.el9.x86_64
      libdnf-0.69.0-6.el9_3.x86_64
      librepo-1.14.5-1.el9.x86_64

            rhn-support-ppisar Petr Pisar
            rhn-support-rmetrich Renaud Métrich
            packaging-team-maint packaging-team-maint
            Eva Mrakova Eva Mrakova
            Mariya Pershina Mariya Pershina
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              Created:
              Updated:
              Resolved: