Bug 449909

Summary:	User Mode Linux (UML) broken on Fedora 9
Product:	[Fedora] Fedora	Reporter:	Ronald Wahl <ronald.wahl>
Component:	kernel	Assignee:	Roland McGrath <roland>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	low
Version:	9	CC:	chkr, kernel-maint, matt
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:	2.6.25.9-76.fc9	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-07-02 06:34:58 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 Ronald Wahl 2008-06-04 08:46:31 UTC

Description of problem:

User Mode Linux (UML) kernels do not start on Fedora 9 anymore.

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


How reproducible:

Always

Steps to Reproduce:
1. Download UML kernel from http://user-mode-linux.sourceforge.net/ (no
filesystem required)
2. Uncompress the kernel (bunzip2 ...)
3. Make it executable (chmod 755 ...)
4. Start the UML kernel
  
Actual results:

$ ./linux-2.6.24-rc7 
Core dump limits :
        soft - 0
        hard - NONE
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...OK
Checking advanced syscall emulation patch for ptrace...check_ptrace : expected
SIGTRAP or (SIGTRAP | 0x80), got status = 256

Expected results:

Kernel should not give the error and start

Additional info:

UML mailing list suggests to report this here as it seems to be a ptrace bug in
Fedora 9. See: http://marc.info/?l=user-mode-linux-user&m=121207568609301&w=2

I have not yet found a way to get UML kernels to work and so I cannot really
make use of Fedora 9 because I develop software that requires UML.

Comment 1 Christian Krause 2008-06-11 13:39:32 UTC

I've tried out to rebuild the kernel 2.6.25 without the utrace patch (in Fedora
8, but I'd expect the some behaviour in F9), and UML works fine. Please see my
comment #1 in the associated bug: 450501 .

Comment 2 Chuck Ebbert 2008-06-12 20:35:11 UTC

Fixed in 2.6.25.6-58

Comment 3 Fedora Update System 2008-06-30 16:33:55 UTC

kernel-2.6.25.9-76.fc9 has been submitted as an update for Fedora 9

Comment 4 Fedora Update System 2008-07-01 05:28:31 UTC

kernel-2.6.25.9-76.fc9 has been pushed to the Fedora 9 testing repository.  If problems still persist, please make note of it in this bug report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update kernel'.  You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F9/FEDORA-2008-5893

Comment 5 Fedora Update System 2008-07-02 06:34:42 UTC

kernel-2.6.25.9-76.fc9 has been pushed to the Fedora 9 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2008-07-04 03:40:19 UTC

kernel-2.6.25.9-76.fc9 has been pushed to the Fedora 9 stable repository.  If problems still persist, please make note of it in this bug report.