Bug 703482
| Summary: | enforcing MLS -- AVCs appear when running "kpartx -v /dev/sda" | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Milos Malik <mmalik> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5.7 | CC: | dwalsh, jrieden |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-2.4.6-306.el5 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-07-21 09:20:15 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
ls -lZ /sbin/kpartx If it is not labeled lvm_exec_t can you change its label to this, and try again chcon -t lvm_exec_t /sbin/kpartx Current state: # ls -Z /sbin/kpartx -rwxr-xr-x root root system_u:object_r:sbin_t:SystemLow /sbin/kpartx # matchpathcon /sbin/kpartx /sbn/kpartx system_u:object_r:sbin_t:SystemLow # # chcon -t lvm_exec_t /sbin/kpartx # ls -Z /sbin/kpartx -rwxr-xr-x root root system_u:object_r:lvm_exec_t:SystemLow /sbin/kpartx # setenforce 0 # kpartx -v /dev/sda sda1 : 0 208782 /dev/sda 63 sda2 : 0 488183220 /dev/sda 208845 # setenforce 1 # kpartx -v /dev/sda failed to stat() /dev/sda # # setenforce 1
# semodule -DB
# kpartx -v /dev/sda
failed to stat() /dev/sda
# ausearch -m avc -m user_avc -ts recent
----
time->Thu May 12 03:23:44 2011
type=SYSCALL msg=audit(1305185024.393:194): arch=c000003e syscall=4 success=no exit=-13 a0=7fff915ddd99 a1=7fff915dc700 a2=7fff915dc700 a3=0 items=0 ppid=3647pid=3754 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=ttyS1 ses=2 comm="kpartx" exe="/sbin/kpartx" subj=root:sysadm_r:lvm_t:s0-s15c0.c1023 key=(null)
type=AVC msg=audit(1305185024.393:194): avc: denied { getattr } for pid=3754 comm="kpartx" path="/dev/sda" dev=tmpfs ino=1142 scontext=root:sysadm_r:lvm_t:s0-s15:c0.c1023 tcontext=system_u:object_r:fixed_disk_device_t:s15:c0.c1023 tclass=blk_file
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AFAIK we have the same issue in RHEL6? It is fixed already. Here is the bug report: https://bugzilla.redhat.com/show_bug.cgi?id=681887 I need to backport /sbin/kpartx -- gen_context(system_u:object_r:lvm_exec_t,s0) mls_file_read_all_levels(lvm_t) mls_file_upgrade(lvm_t) and probably other lvm fixes which have been done in RHEL6. Yes Fixed in selinux-policy-2.4.6-306.el5 An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2011-1069.html An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2011-1069.html |
Description of problem: Version-Release number of selected component (if applicable): selinux-policy-devel-2.4.6-304.el5 selinux-policy-minimum-2.4.6-304.el5 selinux-policy-strict-2.4.6-304.el5 selinux-policy-mls-2.4.6-304.el5 selinux-policy-2.4.6-304.el5 selinux-policy-targeted-2.4.6-304.el5 How reproducible: always Steps to Reproduce: # sestatus SELinux status: enabled SELinuxfs mount: /selinux Current mode: enforcing Mode from config file: enforcing Policy version: 21 Policy from config file: mls # id -Z root:sysadm_r:sysadm_t:SystemLow-SystemHigh # kpartx -v /dev/sda /dev/mapper/control: open failed: Permission denied Failure to communicate with kernel device-mapper driver. /dev/sda: Permission denied # Actual results: ---- time->Tue May 10 09:41:43 2011 type=SYSCALL msg=audit(1305034903.072:185): arch=c0000032 syscall=1028 success=no exit=-13 a0=60000fffff9a7d9c a1=0 a2=0 a3=20000000002b8238 items=0 ppid=13455 pid=29054 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=ttyS1 ses=1 comm="kpartx" exe="/sbin/kpartx" subj=root:sysadm_r:sysadm_t:s0-s15:c0.c1023 key=(null) type=AVC msg=audit(1305034903.072:185): avc: denied { read } for pid=29054 comm="kpartx" name="sda" dev=tmpfs ino=2016 scontext=root:sysadm_r:sysadm_t:s0-s15:c0.c1023 tcontext=system_u:object_r:fixed_disk_device_t:s15:c0.c1023 tclass=blk_file ---- time->Tue May 10 09:41:43 2011 type=SYSCALL msg=audit(1305034903.071:184): arch=c0000032 syscall=1028 success=no exit=-13 a0=60000fffff9a65f8 a1=2 a2=0 a3=20000000002b8238 items=0 ppid=13455 pid=29054 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=ttyS1 ses=1 comm="kpartx" exe="/sbin/kpartx" subj=root:sysadm_r:sysadm_t:s0-s15:c0.c1023 key=(null) type=AVC msg=audit(1305034903.071:184): avc: denied { read write } for pid=29054 comm="kpartx" name="control" dev=tmpfs ino=2047 scontext=root:sysadm_r:sysadm_t:s0-s15:c0.c1023 tcontext=system_u:object_r:lvm_control_t:s0 tclass=chr_file ---- Expected results: no AVCs