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#!/bin/bash
set -e
tmpfile=$(mktemp)
if [ ! -w $tmpfile ] ; then
echo "Failed to create tmp file" >&2
exit 0
fi
trap "rm -rf $tmpfile" EXIT # cleanup if aborted
RULESET="add table x
add chain x y
add rule x y jump y"
echo "$RULESET" > $tmpfile
# kernel must return ELOOP
$NFT -f $tmpfile 2>/dev/null
echo "E: allowing jump to chain loop"
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