Bug 1250550
| Summary: | Allow snapperd one-way communication with clients via pipe | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Ondrej Kozina <okozina> |
| Component: | selinux-policy | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.2 | CC: | lvrabec, mgrepl, mmalik, okozina, plautrba, pvrabec, ssekidde |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.13.1-39.el7 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-11-19 10:43:06 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: | |||
Does the scenario trigger any other AVCs in permissive mode? This is full listing. AFAICT only the read denial is blocking snapperd from sending data back to clients.
type=AVC msg=audit(1438848621.979:313): avc: denied { noatsecure } for pid=30847 comm="snapperd" scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:snapperd_t:s0-s0:c0.c1023 tclass=process
type=AVC msg=audit(1438848621.979:313): avc: denied { siginh } for pid=30847 comm="snapperd" scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:snapperd_t:s0-s0:c0.c1023 tclass=process
type=AVC msg=audit(1438848621.979:313): avc: denied { rlimitinh } for pid=30847 comm="snapperd" scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:snapperd_t:s0-s0:c0.c1023 tclass=process
type=AVC msg=audit(1438848622.149:314): avc: denied { read } for pid=1393 comm="dbus-daemon" path="pipe:[58763]" dev="pipefs" ino=58763 scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:snapperd_t:s0-s0:c0.c1023 tclass=fifo_file
We want to allow
type=AVC msg=audit(1438848622.149:314): avc: denied { read } for pid=1393 comm="dbus-daemon" path="pipe:[58763]" dev="pipefs" ino=58763 scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:snapperd_t:s0-s0:c0.c1023 tclass=fifo_file
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-2015-2300.html |
Could you please allow snapperd to pass data (one way only) via pipe negotiated over dbus? type=AVC msg=audit(1438778241.065:237): avc: denied { read } for pid=1550 comm="dbus-daemon" path="pipe:[63866]" dev="pipefs" ino=63866 scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:snapperd_t:s0-s0:c0.c1023 tclass=fifo_file We do not open new hole since snapper is already effectively bypassing MAC by passing list of files over dbus already. Now we just send the list via pipe because of dbus message size limitations Version-Release number of selected component (if applicable): snapper-0.1.7-10.el7 selinux-policy-3.13.1-36.el7.noarch How reproducible: Always Steps to Reproduce: 1. create two snapshot with snapper (so that diff is non-empty) 2. run snapper -c some_name status 1..2 (1 and 2 are snapshots created in step 1.) Actual results: [root@ibm-p8-02-lp3 xfs]# snapper -c xfs status 1..2 Failure (org.freedesktop.DBus.Error.NoReply).