Bug 99011 - Full backup of root directory using 'tar' causes system reboot
Full backup of root directory using 'tar' causes system reboot
Status: CLOSED NOTABUG
Product: Red Hat Enterprise Linux 2.1
Classification: Red Hat
Component: tar (Show other bugs)
2.1
ia64 Linux
medium Severity high
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Assigned To: Jeff Johnson
Ben Levenson
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Depends On:
Blocks:
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Reported: 2003-07-11 13:36 EDT by dnd
Modified: 2007-11-30 17:06 EST (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2003-07-11 16:37:06 EDT
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Description dnd 2003-07-11 13:36:46 EDT
From Bugzilla Helper:
User-Agent: Mozilla/4.75 [en] (WinNT; U)

Description of problem:
ia64/IPF (rx2600) system reboots during execution of "tar cvf fullbackup.tar /" command. The culprit is /proc filesystem. If the tar 
command excludes the /proc filesystem, the tar command is successful without a system reboot. 

It turns out the the problem is the ia-64 memory space with its embedded I/O memory and holes.  If you read one of these invalid 
memory locations you will MCA.  For example, just wc /proc/kcore you will generate an MCA and reboot. 




Version-Release number of selected component (if applicable):
tar-1.13.25-4.AS21.0

How reproducible:
Always

Steps to Reproduce:
1. Execute "tar cvf fullbackup.tar /" 
2. System would reboot during the backup of /proc filesystem.
3.
    

Actual Results:  Automatic System Reboot

Expected Results:  System should NOT automatically reboot during backup of /proc filesystem.

Additional info
Comment 1 dnd 2003-07-11 13:41:51 EDT
[root@netuxipf root]# cat /etc/redhat-release
Red Hat Linux Advanced Server release 2.1AS (Derry)

[root@netuxipf root]# uname -a
Linux netuxipf 2.4.18-e.31smp #1 SMP Wed May 21 17:47:59 EDT 
2003 ia64 unknown
Comment 2 Bill Nottingham 2003-07-11 16:37:06 EDT
Reading of memory holes and other I/O space is expected to MCA.

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