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overlayfs-etc: Unmount /sys and /proc before init

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/sys filesystem mounted by the preinit script causes shadowing of
/sys/firmware/efi/ by double /sys mounting on systemd enabled systems
[1]. As the result EFI tooling is broken

[1]
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
sysfs on /sys type sysfs (rw,relatime)

(From OE-Core rev: 94b3f86bac16ac3be468e23e1f6aad69cdf502d3)

Signed-off-by: Pavel Zhukov <pavel@zhukoff.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Pavel Zhukov 2025-03-25 10:40:14 +01:00 committed by Richard Purdie
parent 6ade544faa
commit 9863ffc50f
1 changed files with 3 additions and 0 deletions
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3
meta/files/overlayfs-etc-preinit.sh.in
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@ -48,5 +48,8 @@ else
echo "PREINIT: Mounting </data> failed!"
fi
umount /sys
umount /proc
echo "PREINIT: done; starting </sbin/init>"
exec {SBIN_INIT_NAME}