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  jim.bell@dsto.defence.gov.au
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Date: Mon, 11 Mar 2002 20:03:00 -0000
From: jim.bell@dsto.defence.gov.au
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Subject: insight/132: losetup behaviour incorrect for large offsets
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>Number:         132
>Category:       insight
>Synopsis:       losetup behaviour incorrect for large offsets
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 11 20:03:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     jim.bell@dsto.defence.gov.au
>Release:        unknown-1.0
>Organization:
>Environment:
RH 7.2 2.4.7-10enterprise
>Description:
losetup uses an offset value of 2^31 - 1 whenever an offset greater than or equal to this is specified.  Worse, it changes the value silently, and the documentation does not mention a signed 32 bit limit on this value.

With loopback files growing in size with disk size, a 2GB limit is inappropriate.
>How-To-Repeat:
touch loopback
losetup -o 3000000000 /dev/loop6 loopback
losetup /dev/loop6
(returns 2^31-1 as offset, clearly wrong)
>Fix:
Hoping someone can tell me!
>Release-Note:
>Audit-Trail:
>Unformatted: