Bug 1263508 – Heavy program map usage can lead to a hang

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Bug 1263508 - Heavy program map usage can lead to a hang

Summary:	Heavy program map usage can lead to a hang

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	autofs (Show other bugs)
Sub Component:
Version:	7.2
Hardware:	All Linux

Priority	unspecified Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Ian Kent
QA Contact:	Yongcheng Yang
Docs Contact:

URL:
Whiteboard:
Keywords:	Regression

Depends On:	1263505
Blocks:
	Show dependency tree / graph

Reported:	2015-09-15 22:44 EDT by Ian Kent
Modified:	2015-11-19 08:01 EST (History)
CC List:	4 users (show)

See Also:
Fixed In Version:	autofs-5.0.7-54
Doc Type:	Bug Fix
Doc Text:	Cause: Changes made for bug 1162041 added a function call that was out of order and could introduce a deadlock in the process created to execute a program map. Consequence: This caused the program map to not be executed and the required mount to not be done as well as leaving stale process that can't complete. Fix: Move the out of order function call to the correct location in the program map execution module. Result: Program map executed, required mount attempted without leaving blocked stale processes.
Story Points:	---
Clone Of:	1263505
Environment:
Last Closed:	2015-11-19 08:01:07 EST
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Patch - fix out of order call in program map lookup (2.07 KB, patch) 2015-09-15 22:46 EDT, Ian Kent	no flags	Details \| Diff
Patch - fix out of order call in program map lookup (updated) (1.99 KB, patch) 2015-09-17 04:01 EDT, Ian Kent	no flags	Details \| Diff
Show Obsolete (1) Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2015:2417	normal	SHIPPED_LIVE	Moderate: autofs security, bug fix and enhancement update	2015-11-19 06:23:21 EST

Groups: None (edit)

Description Ian Kent 2015-09-15 22:44:01 EDT

This regression was introduced in rhel-7.2 also, in autofs
revision 49.

+++ This bug was initially created as a clone of Bug #1263505 +++

Description of problem:

Due to a change to program map environment variable naming
that was included in RHEL-6.7 heavy program map usage can
lead to an automount(8) hang.

Version-Release number of selected component (if applicable):
autofs-5.0.5-113.

The problem was introduced in autofs revision 111.

--- Additional comment from Ian Kent on 2015-09-15 22:37:15 EDT ---

Upstream fix, still needs to be back ported.

Comment 1 Ian Kent 2015-09-15 22:46:26 EDT

Created attachment 1073883 [details]
Patch - fix out of order call in program map lookup

Upstream fix, still needs to be back ported.

Comment 3 XuWang 2015-09-15 23:31:08 EDT

This topic include the detail info about this bug.

http://www.spinics.net/lists/autofs/msg01050.html

Comment 6 Ian Kent 2015-09-17 04:01:31 EDT

Created attachment 1074323 [details]
Patch - fix out of order call in program map lookup (updated)

Updated patch for RHEL-7 package.

Comment 9 errata-xmlrpc 2015-11-19 08:01:07 EST

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/RHSA-2015-2417.html

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