Public bug reported:
I'm getting black screen trying to boot KDE Neon Unstable
neon-unstable-20220130-0332.iso, which uses
shim-signed 1.40.7+15.4-0ubuntu9
This is due to a bug in shim 15.4 fallback (fbx64.efi), it fails on
CopyMem inside add_to_boot_list on my Lenovo X220 in this place of
fallback.c:
CopyMem(newbootorder + 1, bootorder, sizeof (CHAR16) * option);
CopyMem(newbootorder + option + 1, bootorder + option + 1,
sizeof (CHAR16) * (nbootorder - option - 1));
The fix already present in upstream:
https://github.com/rhboot/shim/commit/41319e14c9144063605750baccd5bb332a3cf4fc
Kindly asking to apply this patch or update shim to current git master.
** Affects: shim (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1959618
Title:
shim's fallback hangs in CopyMem, can't boot ISOs
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