Bug 1565946
| Summary: | avc: denied { write } comm=systemd-sysctl name=ptrace_scope dev="proc" while doing "docker run" | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Václav Kadlčík <vkadlcik> |
| Component: | container-selinux | Assignee: | Lokesh Mandvekar <lsm5> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | atomic-bugs <atomic-bugs> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.5 | CC: | dwalsh, lvrabec, mgrepl, mmalik, plautrba, ssekidde |
| Target Milestone: | rc | Keywords: | Extras |
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-01-17 13:32:19 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: | |||
*** Bug 1565945 has been marked as a duplicate of this bug. *** Did anything break? I don't believe this is a namespaced sysctl, so this should not be allowed by default inside of containers. (In reply to Daniel Walsh from comment #3) > Did anything break? I haven't met this bug for months but IIRC, I didn't see anything broken at the time I added a dontaudit for this since the sysctl would fail even if SELinux allowed it, since the /proc/sys is mounted readonly. |
Description of problem: I'm observing AVC denials while running "docker build" or "docker run". I've minimized the case to just this command: docker run -ti --rm docker.io/fedora:27 dnf -y update elfutils-default-yama-scope (currently it updates elfutils-default-yama-scope to 0.170-10.fc27 in the Fedora container) ausearch -m avc gives: type=PROCTITLE msg=audit(1523427485.147:34998): proctitle=2F7573722F6C69622F73797374656D642F73797374656D642D73797363746C0031302D64656661756C742D79616D612D73636F70652E636F6E66 type=SYSCALL msg=audit(1523427485.147:34998): arch=c000003e syscall=257 success=no exit=-13 a0=ffffffffffffff9c a1=7fff0eadadd0 a2=80101 a3=0 items=0 ppid=3778 pid=3781 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts5 ses=4294967295 comm="systemd-sysctl" exe="/usr/lib/systemd/systemd-sysctl" subj=system_u:system_r:container_t:s0:c286,c307 key=(null) type=AVC msg=audit(1523427485.147:34998): avc: denied { write } for pid=3781 comm="systemd-sysctl" name="ptrace_scope" dev="proc" ino=859883 scontext=system_u:system_r:container_t:s0:c286,c307 tcontext=system_u:object_r:sysctl_kernel_t:s0 tclass=file Version-Release number of selected component (if applicable): RHEL 7.5 selinux-policy-3.13.1-192.el7.noarch kernel-3.10.0-862.el7.x86_64 docker-1.13.1-58.git87f2fab.el7.x86_64 How reproducible: Seems 100% Steps to Reproduce: 1. Have Docker running 2. docker pull docker.io/fedora:27 3. docker run -ti --rm docker.io/fedora:27 dnf -y update elfutils-default-yama-scope 4. ausearch -m avc -ts today