The "statoverride" script appears to work on the first run for each
kernel. However, any subsequent times the `dpkg-statoverride` command
exits with errorcode 2:
$ apt-get install something-triggering-dkms
Processing triggers for linux-image-5.4.0-96-generic (5.4.0-96.109) ...
/etc/kernel/postinst.d/dkms:
* dkms: running auto installation service for kernel 5.4.0-96-generic
...done.
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-5.4.0-96-generic
/etc/kernel/postinst.d/statoverride:
dpkg-statoverride: error: an override for '/boot/vmlinuz-5.4.0-96-generic'
already exists; aborting
run-parts: /etc/kernel/postinst.d/statoverride exited with return code 2
dpkg: error processing package linux-image-5.4.0-96-generic (--configure):
installed linux-image-5.4.0-96-generic package post-installation script
subprocess returned error exit status 1
Errors were encountered while processing:
linux-image-5.4.0-96-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)
Adding the `--force-statoverride-add` flag fixed the issue:
#!/bin/sh
# https://bugs.launchpad.net/ubuntu/+source/linux/+bug/759725
set -e
version="$1"
if [ -z "$version" ]; then
exit 0
fi
exec dpkg-statoverride --force-statoverride-add --update --add root root
0644 "/boot/vmlinuz-${version}"
After that change, now the kernel dkms trigger succeeds:
Setting up linux-image-5.4.0-96-generic (5.4.0-96.109) ...
Processing triggers for linux-image-5.4.0-96-generic (5.4.0-96.109) ...
/etc/kernel/postinst.d/dkms:
* dkms: running auto installation service for kernel 5.4.0-96-generic
...done.
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-5.4.0-96-generic
/etc/kernel/postinst.d/statoverride:
dpkg-statoverride: warning: an override for
'/boot/vmlinuz-5.4.0-96-generic' already exists, but --force specified so will
be ignored
/etc/kernel/postinst.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.4.0-96-generic
Found initrd image: /boot/initrd.img-5.4.0-96-generic
Found linux image: /boot/vmlinuz-5.4.0-94-generic
Found initrd image: /boot/initrd.img-5.4.0-94-generic
Found linux image: /boot/vmlinuz-5.4.0-91-generic
Found initrd image: /boot/initrd.img-5.4.0-91-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
Found Ubuntu 20.04.3 LTS (20.04) on /dev/md126p1
done
If this is to be added as a postinst.d to the libguestfs-tools package,
please don't forget the `--force-statoverride-add` flag... or else we
introduce a new dkms / kernel postinst.d trigger idempotency bug.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/759725
Title:
The kernel is no longer readable by non-root users
Status in linux package in Ubuntu:
Won't Fix
Bug description:
The mode of the latest kernel has changed so it is no longer readable
by non-root users:
-rw-r--r-- 1 root root 4336016 2010-10-17 01:37
/boot/vmlinuz-2.6.35-22-generic
-rw-r--r-- 1 root root 4336912 2010-11-24 12:46
/boot/vmlinuz-2.6.35-23-generic
-rw-r--r-- 1 root root 4523072 2011-03-08 18:47 /boot/vmlinuz-2.6.38-6-generic
-rw------- 1 root root 4523936 2011-04-11 05:24 /boot/vmlinuz-2.6.38-8-generic
This prevents people from using this kernel to boot qemu
virtual machines as non-root.
Please change the mode back to make the kernel readable.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code
2: ls: cannot access /dev/snd/: No such file or directory
AplayDevices: aplay: device_list:240: no soundcards found...
Architecture: amd64
ArecordDevices: arecord: device_list:240: no soundcards found...
CRDA: Error: [Errno 2] No such file or directory
Date: Wed Apr 13 13:05:01 2011
HibernationDevice: RESUME=UUID=112bf9c4-620e-441f-abb3-aeac6aa15294
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: Red Hat KVM
PciMultimedia:
ProcEnviron:
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic
root=UUID=1efa0b67-17df-484e-980c-8544fa2149fe ro quiet splash
RelatedPackageVersions:
linux-restricted-modules-2.6.35-22-generic N/A
linux-backports-modules-2.6.35-22-generic N/A
linux-firmware 1.50
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/01/2007
dmi.bios.vendor: Seabios
dmi.bios.version: 0.5.1
dmi.chassis.type: 1
dmi.chassis.vendor: Red Hat
dmi.modalias:
dmi:bvnSeabios:bvr0.5.1:bd01/01/2007:svnRedHat:pnKVM:pvrRHEL6.0.0PC:cvnRedHat:ct1:cvr:
dmi.product.name: KVM
dmi.product.version: RHEL 6.0.0 PC
dmi.sys.vendor: Red Hat
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