Bug 1309417
| Summary: | AVC denied messages related to kmsg_device_t since latest updates | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Robert Scheck <redhat-bugzilla> |
| 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, redhat-bugzilla, robert.scheck, srandhaw, ssekidde |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.13.1-66.el7 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-11-04 02:43:14 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: | |||
Cross-filed case 01585218 on the Red Hat customer portal. Btw, note that above messages are from two different reboots, we just allowed the first before the second reboot when rebooting with permissive, however we did not see more messages in permissive. Unfortunately we were also not able to track down the origin and if there's a relation to the overrun messages. Could you check if the running kernel command line contains some kmsg parameter or value? # grep kmsg /proc/cmdline $ grep kmsg /proc/cmdline BOOT_IMAGE=/vmlinuz-3.10.0-327.10.1.el7.x86_64 root=/dev/mapper/vg1-root ro rd.lvm.lv=vg1/root crashkernel=auto rd.lvm.lv=vg1/swap console=ttyS1,115200n8 systemd.debug LANG=en_US.UTF-8 systemd.log_level=debug systemd.log_target=kmsg $ This bug was accidentally moved from POST to MODIFIED via an error in automation, please see mmccune with any questions 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: type=AVC msg=audit(1455729417.967:1376): avc: denied { write } for pid=12653 comm="systemd-notify" name="kmsg" dev="devtmpfs" ino=1034 scontext=system_u:system_r:systemd_notify_t:s0 tcontext=system_u:object_r:kmsg_device_t:s0 tclass=chr_file type=SYSCALL msg=audit(1455729417.967:1376): arch=c000003e syscall=2 success=no exit=-13 a0=7f3b0224dcd4 a1=80101 a2=ffffffff a3=7f3b019e37b8 items=0 ppid=1 pid=12653 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="systemd-notify" exe="/usr/bin/systemd-notify" subj=system_u:system_r:systemd_notify_t:s0 key=(null) type=AVC msg=audit(1455731077.537:1411): avc: denied { open } for pid=12608 comm="systemd-notify" path="/dev/kmsg" dev="devtmpfs" ino=1034 scontext=system_u:system_r:systemd_notify_t:s0 tcontext=system_u:object_r:kmsg_device_t:s0 tclass=chr_file type=SYSCALL msg=audit(1455731077.537:1411): arch=c000003e syscall=2 success=no exit=-13 a0=7f7e9a7b8cd4 a1=80101 a2=ffffffff a3=7f7e99f4e7b8 items=0 ppid=1 pid=12608 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="systemd-notify" exe="/usr/bin/systemd-notify" subj=system_u:system_r:systemd_notify_t:s0 key=(null) Version-Release number of selected component (if applicable): selinux-policy-targeted-3.13.1-60.el7_2.3.noarch systemd-219-19.el7_2.4.x86_64 How reproducible: Everytime, see above and below. Actual results: AVC denied messages related to kmsg_device_t since latest updates. Expected results: No AVC denied messages related to kmsg_device_t. Additional info: No matter if it's related or not, but during boot we see the following about a zillion times on the screen: systemd-journald[...]: /dev/kmsg buffer overrun, some messages lost