Bug 2056207
| Summary: | systemd-sysctl was denied reading suid_dumpable, protected_hardlinks, and protected_symlinks by SELinux when booting Fedora 36 | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Matt Fagnani <matt.fagnani> |
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 36 | CC: | dwalsh, grepl.miroslav, jvanderwaa, lvrabec, mmalik, omosnace, pkoncity, vmojzis, zpytela |
| Target Milestone: | --- | Keywords: | Triaged |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-36.5-1.fc36 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2022-03-24 19:33:56 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
I've submitted a Fedora PR to address the issue: https://github.com/fedora-selinux/selinux-policy/pull/1089 Test coverage for this bug exists in a form of PR: * https://src.fedoraproject.org/tests/selinux/pull-request/277 The PR waits for review. This also occurs on rhel-9-0 https://logs.cockpit-project.org/logs/pull-2995-20220224-024319-307fc473-rhel-9-0-cockpit-project-cockpit/log.html#268 (In reply to Jelle van der Waa from comment #3) > This also occurs on rhel-9-0 > https://logs.cockpit-project.org/logs/pull-2995-20220224-024319-307fc473- > rhel-9-0-cockpit-project-cockpit/log.html#268 Yes, refer to bz#2056999 FEDORA-2022-b0805acc47 has been submitted as an update to Fedora 36. https://bodhi.fedoraproject.org/updates/FEDORA-2022-b0805acc47 FEDORA-2022-b0805acc47 has been pushed to the Fedora 36 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2022-b0805acc47` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2022-b0805acc47 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2022-b0805acc47 has been pushed to the Fedora 36 stable repository. If problem still persists, please make note of it in this bug report. |
Description of problem: I booted a Fedora 36 KDE Plasma installation after upgrading from Fedora 35. systemd-sysctl was denied reading suid_dumpable, protected_hardlinks, and protected_symlinks by SELinux when booting Fedora 36. Feb 19 14:19:22 systemd[1]: Starting systemd-sysctl.service - Apply Kernel Variables... Feb 19 14:19:22 systemd[1]: systemd-sysusers.service - Create System Users was skipped because of a failed condition check (ConditionNeedsUpdate=/etc). Feb 19 14:19:22 systemd[1]: Starting systemd-tmpfiles-setup-dev.service - Create Static Device Nodes in /dev... Feb 19 14:19:22 systemd-journald[631]: Time spent on flushing to /var/log/journal/cf0bf479bcf04633b727cb244f663cd7 is 98.876ms for 1356 entries. Feb 19 14:19:22 systemd-journald[631]: System Journal (/var/log/journal/cf0bf479bcf04633b727cb244f663cd7) is 2.2G, max 4.0G, 1.7G free. Feb 19 14:19:22 systemd-journald[631]: Received client request to flush runtime journal. Feb 19 14:19:22 audit[641]: AVC avc: denied { read } for pid=641 comm="systemd-sysctl" name="suid_dumpable" dev="proc" ino=400 scontext=system_u:system_r:systemd_sysctl_t:s0 tcontext=system_u:object_r:proc_security_t:s0 tclass=file permissive=0 Feb 19 14:19:22 audit[641]: SYSCALL arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=7ffd162b13d0 a2=80102 a3=0 items=0 ppid=1 pid=641 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="systemd-sysctl" exe="/usr/lib/systemd/systemd-sysctl" subj=system_u:system_r:systemd_sysctl_t:s0 key=(null) Feb 19 14:19:22 audit: PROCTITLE proctitle="/usr/lib/systemd/systemd-sysctl" Feb 19 14:19:22 audit[641]: AVC avc: denied { read } for pid=641 comm="systemd-sysctl" name="suid_dumpable" dev="proc" ino=400 scontext=system_u:system_r:systemd_sysctl_t:s0 tcontext=system_u:object_r:proc_security_t:s0 tclass=file permissive=0 Feb 19 14:19:22 audit[641]: SYSCALL arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=7ffd162b13d0 a2=80000 a3=0 items=0 ppid=1 pid=641 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="systemd-sysctl" exe="/usr/lib/systemd/systemd-sysctl" subj=system_u:system_r:systemd_sysctl_t:s0 key=(null) Feb 19 14:19:22 audit: PROCTITLE proctitle="/usr/lib/systemd/systemd-sysctl" Feb 19 14:19:22 audit[641]: AVC avc: denied { read } for pid=641 comm="systemd-sysctl" name="protected_hardlinks" dev="proc" ino=419 scontext=system_u:system_r:systemd_sysctl_t:s0 tcontext=system_u:object_r:proc_security_t:s0 tclass=file permissive=0 Feb 19 14:19:22 audit[641]: SYSCALL arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=7ffd162b13d0 a2=80102 a3=0 items=0 ppid=1 pid=641 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="systemd-sysctl" exe="/usr/lib/systemd/systemd-sysctl" subj=system_u:system_r:systemd_sysctl_t:s0 key=(null) Feb 19 14:19:22 audit: PROCTITLE proctitle="/usr/lib/systemd/systemd-sysctl" Feb 19 14:19:22 audit[641]: AVC avc: denied { read } for pid=641 comm="systemd-sysctl" name="protected_hardlinks" dev="proc" ino=419 scontext=system_u:system_r:systemd_sysctl_t:s0 tcontext=system_u:object_r:proc_security_t:s0 tclass=file permissive=0 Feb 19 14:19:22 audit[641]: SYSCALL arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=7ffd162b13d0 a2=80000 a3=0 items=0 ppid=1 pid=641 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="systemd-sysctl" exe="/usr/lib/systemd/systemd-sysctl" subj=system_u:system_r:systemd_sysctl_t:s0 key=(null) Feb 19 14:19:22 audit: PROCTITLE proctitle="/usr/lib/systemd/systemd-sysctl" Feb 19 14:19:22 audit[641]: AVC avc: denied { read } for pid=641 comm="systemd-sysctl" name="protected_symlinks" dev="proc" ino=420 scontext=system_u:system_r:systemd_sysctl_t:s0 tcontext=system_u:object_r:proc_security_t:s0 tclass=file permissive=0 Feb 19 14:19:22 audit[641]: SYSCALL arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=7ffd162b13d0 a2=80102 a3=0 items=0 ppid=1 pid=641 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="systemd-sysctl" exe="/usr/lib/systemd/systemd-sysctl" subj=system_u:system_r:systemd_sysctl_t:s0 key=(null) Feb 19 14:19:22 audit: PROCTITLE proctitle="/usr/lib/systemd/systemd-sysctl" Feb 19 14:19:22 audit[641]: AVC avc: denied { read } for pid=641 comm="systemd-sysctl" name="protected_symlinks" dev="proc" ino=420 scontext=system_u:system_r:systemd_sysctl_t:s0 tcontext=system_u:object_r:proc_security_t:s0 tclass=file permissive=0 Feb 19 14:19:22 audit[641]: SYSCALL arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=7ffd162b13d0 a2=80000 a3=0 items=0 ppid=1 pid=641 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="systemd-sysctl" exe="/usr/lib/systemd/systemd-sysctl" subj=system_u:system_r:systemd_sysctl_t:s0 key=(null) Feb 19 14:19:22 audit: PROCTITLE proctitle="/usr/lib/systemd/systemd-sysctl" I also saw these denials on a few boots of the live image Fedora-KDE-Live-x86_64-36-20220215.n.0.iso https://koji.fedoraproject.org/koji/buildinfo?buildID=1918275. I'm using the targeted policy in enforcing mode. Version-Release number of selected component (if applicable): selinux-policy-36.2-2.fc36.noarch systemd-udev-250.3-4.fc36.x86_64 How reproducible: These denials happened on each of several boots of Fedora 36 KDE Plasma installation and Fedora-KDE-Live-x86_64-36-20220215.n.0.iso Steps to Reproduce: 1. Boot a Fedora 36 KDE Plasma installation updated to 2022-2-19 or Fedora-KDE-Live-x86_64-36-20220215.n.0.iso Actual results: systemd-sysctl was denied reading suid_dumpable, protected_hardlinks, and protected_symlinks by SELinux when booting Fedora 36. Expected results: No denials would happen. Additional info: The denials didn't appear in the SELinux troubleshoot GUI or as SELinux alert notifications in Plasma.