Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Description of problem:
* vsftpd generates boat loads (technical figure) of SELinux denials which are ignored by dontaudit rules.
* Disabling dontaudit rules causes boat loads of denials to be logged to audit.log.
* setroubleshoot is run from dbus for each SELinux denial.
* Thousands of setroubleshoots start simultaneously.
* Machine runs out of memory and locks
* Reboot does not fix problem, machine needs to be booted into rescue and audit.log truncated to fix
How reproducible:
Always
Steps to Reproduce:
1. # yum -y install vsftpd
2. # semanage dontaudit off
3. # systemctl start vsftpd
Actual results:
System runs out of memory and crashes.
Expected results:
System doesn't crash.
(In reply to mheadlee from comment #0)
> Description of problem:
>
> * vsftpd generates boat loads (technical figure) of SELinux denials
> which are ignored by dontaudit rules.
> * Disabling dontaudit rules causes boat loads of denials to be logged to
> audit.log.
> * setroubleshoot is run from dbus for each SELinux denial.
> * Thousands of setroubleshoots start simultaneously.
> * Machine runs out of memory and locks
> * Reboot does not fix problem, machine needs to be booted into rescue
> and audit.log truncated to fix
>
> How reproducible:
> Always
>
> Steps to Reproduce:
> 1. # yum -y install vsftpd
> 2. # semanage dontaudit off
> 3. # systemctl start vsftpd
>
>
> Actual results:
> System runs out of memory and crashes.
>
> Expected results:
> System doesn't crash.
Could you attach examples of these AVCs?
Created attachment 1137372[details]
audit.log from system experiencing the above described issue.
Specifically note "1458216459.180:125" on line 579 when vsftpd is started. System ran out of memory and crashed on line 924.
Based on the last screenshot, the machine swaps heavily (load over 7, kswapd0 process is shown as first in the top output). How much memory does the machine have? Maybe setroubleshoot-server (written python) is consuming too much memory.
Description of problem: * vsftpd generates boat loads (technical figure) of SELinux denials which are ignored by dontaudit rules. * Disabling dontaudit rules causes boat loads of denials to be logged to audit.log. * setroubleshoot is run from dbus for each SELinux denial. * Thousands of setroubleshoots start simultaneously. * Machine runs out of memory and locks * Reboot does not fix problem, machine needs to be booted into rescue and audit.log truncated to fix How reproducible: Always Steps to Reproduce: 1. # yum -y install vsftpd 2. # semanage dontaudit off 3. # systemctl start vsftpd Actual results: System runs out of memory and crashes. Expected results: System doesn't crash.