Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.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.

Bug 1622194

Summary:	audisp-remote memory leak when using krb5
Product:	Red Hat Enterprise Linux 7	Reporter:	Rob Rozestraten <admin>
Component:	audit	Assignee:	Steve Grubb <sgrubb>
Status:	CLOSED ERRATA	QA Contact:	Ondrej Moriš <omoris>
Severity:	high	Docs Contact:
Priority:	medium
Version:	7.5	CC:	cww, omoris, pvrabec
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	audit-2.8.5-1.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-08-06 13:03:45 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:

Description Rob Rozestraten 2018-08-24 16:51:33 UTC

Description of problem:

audisp-remote heap fills up when krb5 is enabled.

[root(rdosogne)@sitea-db3 ~]# ps auwwxf | grep audisp-remot[e]
root     20519  0.9 39.4 26024224 25912716 ?   S<   Jul10 302:16      \_ /sbin/audisp-remote

7f68637e0000-7f6eb0567000 rw-p 00000000 00:00 0                          [heap]
Size:           26424860 kB
Rss:            26222544 kB
Pss:            26222544 kB
Shared_Clean:          0 kB
Shared_Dirty:          0 kB
Private_Clean:         0 kB
Private_Dirty:  26222544 kB
Referenced:     23867740 kB
Anonymous:      26222544 kB
AnonHugePages:  23259136 kB
Swap:             202212 kB
KernelPageSize:        4 kB
MMUPageSize:           4 kB
Locked:                0 kB
VmFlags: rd wr mr mw me ac sd


Version-Release number of selected component (if applicable):

2.8.1-3


How reprducible:

Use audisp-remote with krb5 enabled.


Steps to Reproduce:
1. Setup audispd to use audisp-remote
2. Enable krb5 in audisp-remote.conf
3. Make a lot of audit log entries

Actual results:

audisp-remote heap grows forever (reached 27G on a db box within a couple weeks).


Expected results:

audisp-remote heap not growing uncontrollably.


Additional info:

It appears this is happening from etok.value in recv_token not being free'd (audisp/plugins/remote/audisp-remote.c).  Tested patch where we free this in recv_msg_gss (alongside utok.value) with no further leakage.  Heap stayed at a paltry 184K during rigorous logging tests.

Pull request submitted here: https://github.com/linux-audit/audit-userspace/pull/61

Comment 2 Rob Rozestraten 2018-08-24 17:06:15 UTC

Before (running ~ 15 seconds):

==15473== 2,631,956 bytes in 34,631 blocks are definitely lost in loss record 185 of 185
==15473==    at 0x4C29C23: malloc (vg_replace_malloc.c:299)
==15473==    by 0x10B69F: recv_token (audisp-remote.c:658)
==15473==    by 0x10B86F: recv_msg_gss (audisp-remote.c:1278)
==15473==    by 0x10CBFC: relay_sock_managed (audisp-remote.c:1500)
==15473==    by 0x10D0AE: relay_sock (audisp-remote.c:1559)
==15473==    by 0x10D0AE: relay_event (audisp-remote.c:1580)
==15473==    by 0x10D0AE: send_one (audisp-remote.c:440)
==15473==    by 0x10AE58: main (audisp-remote.c:599)
==15473==
==15473== LEAK SUMMARY:
==15473==    definitely lost: 2,633,044 bytes in 34,640 blocks
==15473==    indirectly lost: 9,934 bytes in 51 blocks
==15473==      possibly lost: 76 bytes in 1 blocks
==15473==    still reachable: 14,290 bytes in 189 blocks
==15473==         suppressed: 0 bytes in 0 blocks

After (running ~ 30 mins):

==24368== LEAK SUMMARY:
==24368==    definitely lost: 1,088 bytes in 9 blocks
==24368==    indirectly lost: 9,934 bytes in 51 blocks
==24368==      possibly lost: 0 bytes in 0 blocks
==24368==    still reachable: 14,311 bytes in 189 blocks
==24368==         suppressed: 0 bytes in 0 blocks

Comment 3 Steve Grubb 2018-08-24 17:41:06 UTC

Fixed in upstream commit 22f10a1.

Comment 6 Steve Grubb 2019-03-05 18:02:02 UTC

audit-2.8.5-1.el7 was built to address this issue.

Comment 10 errata-xmlrpc 2019-08-06 13:03:45 UTC

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://access.redhat.com/errata/RHBA-2019:2191