Are you still affected? I cannot reproduce this on trusty.
$ echo "test" |xz > /tmp/test.txt.xz $ chmod uog-rwx /tmp/test.txt.xz $ unxz /tmp/test.txt.xz
Are you still affected? I cannot reproduce this on trusty.
$ echo "test" |xz > /tmp/test.txt.xz
$ chmod uog-rwx /tmp/test.txt.xz
$ unxz /tmp/test.txt.xz