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Summary:
The subiquity kernel does not appear to have a valid signature table in it.
Expected Results:
A file with the signature
Actual Results:
Empty signature file and two warnings
warning: file-aligned section .text extends beyond end of file
warning: checksum areas are greater than image size. Invalid section table?
Steps to Reproduce:
1. Download live-server ISO
2. sudo mount -o loop bionic-live-server-amd64.iso live-server
3. sbattach --detach /tmp/signature live-server/casper/vmlinuz
You can test this similarly on the normal server ISO, but look at the
kernel under install/vmlinuz. Running the sbattach command above you
will produce a valid signature file.
** Affects: livecd-rootfs (Ubuntu)
Importance: High
Status: Triaged
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vmlinuz does not have a siganture table
https://bugs.launchpad.net/bugs/1749065
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