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Subject: kern/4996: NFS related kernel crash
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>Number:         4996
>Category:       kern
>Synopsis:       NFS crash, possibly related to file bigger than 2^31 bytes
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Nov 10 07:20:01 PST 1997
>Last-Modified:
>Originator:     Alan Judge
>Organization:
Indigo, Dublin, Ireland.
>Release:        FreeBSD 2.2.5-RELEASE i386
>Environment:

	2.2.5 box, with NetApp filer NFS V3/UDP mounted over 100BaseTX.

>Description:

	Kernel crashed with supervisor page fault in kernel mode.  Crashing
	process was nfsiod.  Traceback: 
		generic_bcopy
		nfs_writerpc
		nfs_doio
		nfssvc_iod
		nfssvc

	[BTW, is there any easy way to save what's printed and the traceback
	 in DDB, to avoid having to write these things down before rebooting?]

	The really suspicious thing is that this happened while I was copying
	a large file to the filer.  The resultant file was only 24K larger
	than 2^31, so I suspect that something blew up at 2^31 bytes.

	I don't have a core dump, but could probably repeat if needed.

>How-To-Repeat:

	Copy a file larger than 2GB over NFS?

>Fix:
>Audit-Trail:
>Unformatted: