Bug 810917 - corosync filling up /dev/shm
Summary: corosync filling up /dev/shm
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: corosync
Version: 6.2
Hardware: x86_64
OS: Linux
urgent
urgent
Target Milestone: rc
: ---
Assignee: Jan Friesse
QA Contact: Cluster QE
URL:
Whiteboard:
Depends On: 797192
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-04-09 15:54 UTC by RHEL Program Management
Modified: 2018-11-27 20:07 UTC (History)
14 users (show)

Fixed In Version: corosync-1.4.1-4.el6_2.2
Doc Type: Bug Fix
Doc Text:
Previously, the underlying library of corosync did not delete temporary buffers used for Inter-Process Communication (IPC) that are stored in the /dev/shm shared memory file system. Therefore, if the user without proper privileges attempted to establish an IPC connection, the attempt failed with an error message as expected but memory allocated for temporary buffers was not released. This could eventually result in /dev/shm being fully used and Denial of Service. This update modifies the coroipcc library to let applications delete temporary buffers if the buffers were not deleted by the corosync server. The /dev/shm file system is no longer cluttered with needless data in this scenario and IPC connections can be established as expected.
Clone Of:
Environment:
Last Closed: 2012-04-30 17:51:07 UTC
Target Upstream Version:

Attachments (Terms of Use)
6.2.z-bz810917-1-Unlink-shm-buffers-if-init-fails (1.49 KB, patch)
2012-04-12 15:35 UTC, Jan Friesse 		no flags Details | Diff
View All Add an attachment (proposed patch, testcase, etc.)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Knowledge Base (Solution) 92603 0 None None None Never
Red Hat Product Errata RHBA-2012:0536 0 normal SHIPPED_LIVE corosync bug fix update 2012-04-30 21:48:14 UTC

Description RHEL Program Management 2012-04-09 15:54:44 UTC 
This bug has been copied from bug #797192 and has been proposed
to be backported to 6.2 z-stream (EUS).
Comment 4 Jan Friesse 2012-04-12 15:35:55 UTC 
Created attachment 577113 [details]
6.2.z-bz810917-1-Unlink-shm-buffers-if-init-fails
Comment 7 Miroslav Svoboda 2012-04-26 12:32:26 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Previously, the underlying library of corosync did not delete temporary buffers used for Inter-Process Communication (IPC) that are stored in the /dev/shm shared memory file system. Therefore, if the user without proper privileges attempted to establish an IPC connection, the attempt failed with an error message as expected but memory allocated for temporary buffers was not released. This could eventually result in /dev/shm being fully used and Denial of Service. This update modifies the coroipcc library to let applications delete temporary buffers if the buffers were not deleted by the corosync server. The /dev/shm file system is no longer cluttered with needless data in this scenario and IPC connections can be established as expected.
Comment 8 errata-xmlrpc 2012-04-30 17:51:07 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.

http://rhn.redhat.com/errata/RHBA-2012-0536.html
Note You need to log in before you can comment on or make changes to this bug.