Bug 578608

Summary:	sys-kernel/genkernel-3.4.52.4-r1: Copies in random bits from host environment
Product:	Gentoo Hosted Projects	Reporter:	Patrick Lauer <patrick>
Component:	genkernel	Assignee:	Gentoo Genkernel Maintainers <genkernel>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Patrick Lauer gentoo-dev

2016-03-30 13:50:57 UTC

I've had some fun tracking down this issue - if I build an initramfs on a host directly I can't boot with it in a VM (and other machines), if I build it in the VM it works everywhere.

So the difference is mostly that the host has CFLAGS="-march=native", but even if I set CFLAGS to something very boring the resulting initramfs explodes.

After some cpio take-aparting I noticed:

ls lib/
keymaps  ld-linux-x86-64.so.2  libblkid.so.1  libc.so.6  libuuid.so.1  modules

hmm, is that ... glibc from the host? Infected with ungood CFLAGS?
Yes, that's exactly what copy_binaries() in /usr/share/genkernel/gen_initramfs.sh does.

Oh my, who would do such a cruel thing and make an unportable initramfs ...

Comment 1 Thomas Deutschmann (RETIRED) gentoo-dev

2019-07-15 10:16:57 UTC

Starting With genkernel-4.0.0-beta.1, we no longer copy random bits from host environment.