There are actually 2 separate bugs. The first is a bug in gnu-efi,
triggered by this call in shim's errlog.c:
size = SPrint(NULL, 0, L"%a:%d %a() ", file, line, func);
According to the gnu-efi source, "A size of 0 means there is no limit",
but SPrint does not check for NULL as the first parameter, and happily
dereferences it anyway.
The other issue I've reported in LP: #1811901.
** Changed in: gnu-efi (Ubuntu)
Status: New => Confirmed
** Changed in: shim-signed (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1811722
Title:
arm64: shim crashes in SecureBoot mode w/ some firmware
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