Bug 6382 - RH61 cpio and /proc/kcore - machine reboots!?
Summary: RH61 cpio and /proc/kcore - machine reboots!?
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: cpio
Version: 6.1
Hardware: i386
OS: Linux
medium
medium
Target Milestone: ---
Assignee: bero
QA Contact:
URL:
Whiteboard:
Keywords:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 1999-10-26 13:16 UTC by mikko.haapanen
Modified: 2008-05-01 15:37 UTC (History)
0 users

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Clone Of:
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Last Closed: 1999-12-17 18:43:03 UTC

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Description mikko.haapanen 1999-10-26 13:16:13 UTC 
Hardware: IBM Netfinity 5000, 256MB, ServeRAID
Software: RedHat 6.1, very standard installation

How to crash:

"find / -type f -print | cpio -oc >/dev/null"
or more isolated version:
echo /proc/kcore | cpio -oc >/dev/null

/var/log/messages gets 3 lines:
Oct 26 13:23:21 myyx0002 kernel: Uhhuh. NMI received for
unknown reason 25.
Oct 26 13:23:21 myyx0002 kernel: Dazed and confused, but
trying to continue
Oct 26 13:23:21 myyx0002 kernel: Do you have a strange power
saving mode enabled?

then cpio completes, no errors, back to prompt

then 45 ... 60 seconds and machine reboots itself !!!!!!!!!

IBM Netfinity has system error led, which gets lit at the
same time when "Uhhuh ..." message comes to
/var/log/messages.
Comment 1 Jeff Johnson 1999-12-17 18:43:59 UTC 
This isn't a cpio problem, but rather a problem in using cpio. There
are files in /proc (and in /dev) that will cause surprises if restored
by cpio. Basically, don't do that ...
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