Bug 746705

Summary:	Remounting tmpfs read-write hangs
Product:	[Fedora] Fedora	Reporter:	Petr Pisar <ppisar>
Component:	util-linux	Assignee:	Karel Zak <kzak>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	jonathan, kzak
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	util-linux-2.20.1-1.fc16	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-10-25 03:45:38 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:

Description Petr Pisar 2011-10-17 15:12:05 UTC

# mount -o ro -t tmpfs none /usr/local
# mount -o remount,rw /usr/local

Here the remount hangs. I have Linux 3.1.0-0.rc9.git0.0.fc17.x86_64 and util-linux-2.20-1.fc17.x86_64.

The hang is in user-space, mount consumes all available CPU time, no syscalls are performed by mount in that time. Debugger shows it cycles on remove_context_options(). Once calling try_mount_one(), debug does not return and I need to SIGINT to get debugger again and the PC pop ups in remove_context_options() again.

Also debugger struggles `Source file is more recent than executable' even if I have up-to-date debuginfo packags.

I'm not sure what happens. I don't get any new denials by SElinux or messages from kernel.

Comment 1 Karel Zak 2011-10-17 15:35:44 UTC

Please, 

 grep /usr/local /proc/self/mountinfo

before the remount. Thanks.

Comment 2 Petr Pisar 2011-10-17 15:42:07 UTC

# grep /usr/local /proc/self/mountinfo 
44 22 0:31 / /usr/local ro,relatime - tmpfs none ro,rootcontext=system_u:object_r:usr_t:s0,seclabel

Comment 3 Karel Zak 2011-10-17 17:01:02 UTC

Fixed by upstream commit 918e4271252ac49cf2d9f8ab56a55ba4dd74b583. Fedora package will be fixed ASAP.

Comment 4 Fedora Update System 2011-10-20 11:48:33 UTC

util-linux-2.20.1-1.fc16 has been submitted as an update for Fedora 16.
https://admin.fedoraproject.org/updates/util-linux-2.20.1-1.fc16

Comment 5 Fedora Update System 2011-10-20 22:15:51 UTC

Package util-linux-2.20.1-1.fc16:
* should fix your issue,
* was pushed to the Fedora 16 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing util-linux-2.20.1-1.fc16'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2011-14685
then log in and leave karma (feedback).

Comment 6 Fedora Update System 2011-10-25 03:45:38 UTC

util-linux-2.20.1-1.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.