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Bug 1582154

Summary:	sudo blocks in poll() for /dev/ptmx with iolog enabled [rhel-7.4.z]
Product:	Red Hat Enterprise Linux 7	Reporter:	Oneata Mircea Teodor <toneata>
Component:	sudo	Assignee:	Daniel Kopeček <dkopecek>
Status:	CLOSED ERRATA	QA Contact:	Dalibor Pospíšil <dapospis>
Severity:	high	Docs Contact:	Mirek Jahoda <mjahoda>
Priority:	urgent
Version:	7.4	CC:	dapospis, dkopecek, fkrska, lkuprova, mjahoda, mmatsuya, sbroz
Target Milestone:	rc	Keywords:	Patch, Regression, Reproducer, Triaged, ZStream
Target Release:	---
Hardware:	Unspecified
OS:	Linux
Whiteboard:
Fixed In Version:	sudo-1.8.19p2-12.el7_4	Doc Type:	Bug Fix
Doc Text:	Previously, when running a command through sudo that had the I/O logging enabled, a parent process of the command was occasionally blocked in the poll() function execution, waiting for an event on the /dev/ptmx file descriptor. Consequently, a deadlock occurred and sudo might leave the process of the command in an unresponsive state. This update adds a pseudoterminal cleanup logic, and sudo no longer causes a deadlock in the described scenario.	Story Points:	---
Clone Of:	1560657	Environment:
Last Closed:	2018-07-10 17:20:39 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1560657
Bug Blocks:

Description Oneata Mircea Teodor 2018-05-24 11:53:45 UTC

This bug has been copied from bug #1560657 and has been proposed to be backported to 7.4 z-stream (EUS).

Comment 6 errata-xmlrpc 2018-07-10 17:20:39 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-2018:2155