Bug 208435

Summary:	gcore command produces empty/corrupted core file
Product:	[Fedora] Fedora	Reporter:	Jan Kratochvil <jan.kratochvil>
Component:	gdb	Assignee:	Alexandre Oliva <aoliva>
Status:	CLOSED RAWHIDE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	aoliva, cagney, jan.kratochvil, pmuldoon
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel-xen-2.6.18-1.2731.fc6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-10-15 01:59:55 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:	190128
Bug Blocks:

Description Jan Kratochvil 2006-09-28 15:38:46 UTC

Description of problem:
gcore(1) produces core file of about 1.5KB without any dumped memory segments.

Version-Release number of selected component (if applicable):
kernel-2.6.18-1.2693.fc6.i686

How reproducible:
Always.

Steps to Reproduce:
1. /bin/sleep 1h& gcore -o core.sleep $!
2. gdb /bin/sleep core.sleep.*
3. bt

Actual results:
Cannot access memory at address 0xbfd2f748

Expected results:
#0  0xb7ff6402 in ?? ()
#1  0x006338b0 in ?? () from /lib/libc.so.6
...

Additional info:
Problem caused by the kernel Bug 190128.

Comment 1 Jan Kratochvil 2006-10-15 01:59:55 UTC

Kernel got fixed, gcore works again:

Bugfix found to be committed:
  revision 1.2731
  date: 2006/10/03 18:00:26;  author: davej;  state: Exp;  lines: +2 -1
  Fix breakage in /proc/*/smaps access control (#208589)
Verified in:
  kernel-xen-2.6.18-1.2747.fc6.i686