Bug 1343776
| Summary: | "ip netns del" cannot unmount /run/netns/* | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Garrett Holmstrom <gholms> |
| Component: | selinux-policy | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.2 | CC: | lvrabec, mgrepl, mmalik, plautrba, pvrabec, ssekidde |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.13.1-80.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-11-04 02:30:52 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: | |||
# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: enforcing
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Max kernel policy version: 28
# runcon system_u:system_r:initrc_t:s0 bash -c '/usr/sbin/ip netns add test'
# runcon system_u:system_r:initrc_t:s0 bash -c '/usr/sbin/ip netns list'
test
# runcon system_u:system_r:initrc_t:s0 bash -c '/usr/sbin/ip netns del test'
Cannot remove namespace file "/var/run/netns/test": Device or resource busy
#
Following SELinux denial appeared in permissive mode:
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type=PATH msg=audit(06/08/2016 10:17:39.213:821) : item=0 name=/var/run/netns/test inode=4026532240 dev=00:03 mode=file,444 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:proc_t:s0 objtype=NORMAL
type=CWD msg=audit(06/08/2016 10:17:39.213:821) : cwd=/root
type=SYSCALL msg=audit(06/08/2016 10:17:39.213:821) : arch=x86_64 syscall=umount2 success=yes exit=0 a0=0x7ffc728c7fe0 a1=MNT_DETACH a2=0x7ffc728c7ff3 a3=0x7ffc728c7d50 items=1 ppid=3240 pid=8134 auid=root uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=pts0 ses=1 comm=ip exe=/usr/sbin/ip subj=system_u:system_r:ifconfig_t:s0 key=(null)
type=AVC msg=audit(06/08/2016 10:17:39.213:821) : avc: denied { unmount } for pid=8134 comm=ip scontext=system_u:system_r:ifconfig_t:s0 tcontext=system_u:object_r:proc_t:s0 tclass=filesystem
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Following SELinux denial appeared in enforcing mode:
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type=PATH msg=audit(06/08/2016 10:19:01.462:862) : item=0 name=/var/run/netns/test inode=4026532240 dev=00:03 mode=file,444 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:proc_t:s0 objtype=NORMAL
type=CWD msg=audit(06/08/2016 10:19:01.462:862) : cwd=/root
type=SYSCALL msg=audit(06/08/2016 10:19:01.462:862) : arch=x86_64 syscall=umount2 success=no exit=EACCES(Permission denied) a0=0x7ffcb98c68c0 a1=MNT_DETACH a2=0x7ffcb98c68d3 a3=0x7ffcb98c6630 items=1 ppid=3240 pid=8426 auid=root uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=pts0 ses=1 comm=ip exe=/usr/sbin/ip subj=system_u:system_r:ifconfig_t:s0 key=(null)
type=AVC msg=audit(06/08/2016 10:19:01.462:862) : avc: denied { unmount } for pid=8426 comm=ip scontext=system_u:system_r:ifconfig_t:s0 tcontext=system_u:object_r:proc_t:s0 tclass=filesystem
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Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2016-2283.html |
Description of problem: While the ifconfig policy appears to have some support for ``ip netns add'' commands, it does not appear to have a working policy for ``ip netns del'' commands, resulting in the following audit messages: type=EXECVE msg=audit(1465332391.813:10109): argc=4 a0="ip" a1="netns" a2="del" a3="test" type=CWD msg=audit(1465332391.813:10109): cwd="/" type=PATH msg=audit(1465332391.813:10109): item=0 name="/usr/sbin/ip" inode=671234140 dev=fd:00 mode=0100755 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:ifconfig_exec_t:s0 objtype=NORMAL type=PATH msg=audit(1465332391.813:10109): item=1 name="/lib64/ld-linux-x86-64.so.2" inode=134225977 dev=fd:00 mode=0100755 ouid=0 og id=0 rdev=00:00 obj=system_u:object_r:ld_so_t:s0 objtype=NORMAL type=AVC msg=audit(1465332391.814:10110): avc: denied { unmount } for pid=13634 comm="ip" scontext=system_u:system_r:ifconfig_t:s0 tcontext=system_u:object_r:proc_t:s0 tclass=filesystem type=SYSCALL msg=audit(1465332391.814:10110): arch=c000003e syscall=166 success=yes exit=0 a0=7fff21238770 a1=2 a2=7fff2123878b a3=7fff212384e0 items=1 ppid=16607 pid=13634 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="ip" exe="/usr/sbin/ip" subj=system_u:system_r:ifconfig_t:s0 key=(null) type=CWD msg=audit(1465332391.814:10110): cwd="/" type=PATH msg=audit(1465332391.814:10110): item=0 name="/var/run/netns/test" inode=4026532434 dev=00:03 mode=0100444 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:proc_t:s0 objtype=NORMAL Version-Release number of selected component (if applicable): selinux-policy-3.13.1-60.el7_2.3.noarch How reproducible: When enforcing Steps to Reproduce: 1. setenforce 0 # work around bug 1340572 2. ip netns add test 3. setenforce 1 4. ip netns del test Actual results: Cannot remove namespace file "/var/run/netns/test": Device or resource busy Expected results: (no output)