Devrais-je m'inquiéter de "avertissement: les zones de somme de contrôle sont supérieures à la taille de l'image. Tableau de section non valide?" messages lors de la mise à niveau du noyau?
Je viens d'exécuter la commande Sudo apt-get dist-upgrade et voici le résultat:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following NEW packages will be installed
linux-headers-4.2.0-23 linux-headers-4.2.0-23-generic
linux-image-4.2.0-23-generic linux-image-extra-4.2.0-23-generic
linux-signed-image-4.2.0-23-generic
The following packages will be upgraded:
linux-generic linux-headers-generic linux-image-generic linux-libc-dev
linux-signed-generic linux-signed-image-generic
6 to upgrade, 5 to newly install, 0 to remove and 0 not to upgrade.
Need to get 67.1 MB of archives.
After this operation, 287 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-image-4.2.0-23-generic AMD64 4.2.0-23.28 [17.3 MB]
Get:2 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-image-extra-4.2.0-23-generic AMD64 4.2.0-23.28 [38.6 MB]
Get:3 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-generic AMD64 4.2.0.23.25 [1,784 B]
Get:4 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-image-generic AMD64 4.2.0.23.25 [2,418 B]
Get:5 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-signed-image-4.2.0-23-generic AMD64 4.2.0-23.28 [3,998 B]
Get:6 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-signed-generic AMD64 4.2.0.23.25 [1,816 B]
Get:7 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-signed-image-generic AMD64 4.2.0.23.25 [2,456 B]
Get:8 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-headers-4.2.0-23 all 4.2.0-23.28 [9,595 kB]
Get:9 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-headers-4.2.0-23-generic AMD64 4.2.0-23.28 [765 kB]
Get:10 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-headers-generic AMD64 4.2.0.23.25 [2,390 B]
Get:11 http://archive.ubuntu.com/ubuntu/ wily-updates/main linux-libc-dev AMD64 4.2.0-23.28 [817 kB]
Fetched 67.1 MB in 1min 34s (708 kB/s)
Selecting previously unselected package linux-image-4.2.0-23-generic.
(Reading database ... 356003 files and directories currently installed.)
Preparing to unpack .../linux-image-4.2.0-23-generic_4.2.0-23.28_AMD64.deb ...
Examining /etc/kernel/preinst.d/
run-parts: executing /etc/kernel/preinst.d/intel-microcode 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
Done.
Unpacking linux-image-4.2.0-23-generic (4.2.0-23.28) ...
Selecting previously unselected package linux-image-extra-4.2.0-23-generic.
Preparing to unpack .../linux-image-extra-4.2.0-23-generic_4.2.0-23.28_AMD64.deb ...
Unpacking linux-image-extra-4.2.0-23-generic (4.2.0-23.28) ...
Preparing to unpack .../linux-generic_4.2.0.23.25_AMD64.deb ...
Unpacking linux-generic (4.2.0.23.25) over (4.2.0.22.24) ...
Preparing to unpack .../linux-image-generic_4.2.0.23.25_AMD64.deb ...
Unpacking linux-image-generic (4.2.0.23.25) over (4.2.0.22.24) ...
Selecting previously unselected package linux-signed-image-4.2.0-23-generic.
Preparing to unpack .../linux-signed-image-4.2.0-23-generic_4.2.0-23.28_AMD64.deb ...
Unpacking linux-signed-image-4.2.0-23-generic (4.2.0-23.28) ...
Preparing to unpack .../linux-signed-generic_4.2.0.23.25_AMD64.deb ...
Unpacking linux-signed-generic (4.2.0.23.25) over (4.2.0.22.24) ...
Preparing to unpack .../linux-signed-image-generic_4.2.0.23.25_AMD64.deb ...
Unpacking linux-signed-image-generic (4.2.0.23.25) over (4.2.0.22.24) ...
Selecting previously unselected package linux-headers-4.2.0-23.
Preparing to unpack .../linux-headers-4.2.0-23_4.2.0-23.28_all.deb ...
Unpacking linux-headers-4.2.0-23 (4.2.0-23.28) ...
Selecting previously unselected package linux-headers-4.2.0-23-generic.
Preparing to unpack .../linux-headers-4.2.0-23-generic_4.2.0-23.28_AMD64.deb ...
Unpacking linux-headers-4.2.0-23-generic (4.2.0-23.28) ...
Preparing to unpack .../linux-headers-generic_4.2.0.23.25_AMD64.deb ...
Unpacking linux-headers-generic (4.2.0.23.25) over (4.2.0.22.24) ...
Preparing to unpack .../linux-libc-dev_4.2.0-23.28_AMD64.deb ...
Unpacking linux-libc-dev:AMD64 (4.2.0-23.28) over (4.2.0-22.27) ...
Setting up linux-image-4.2.0-23-generic (4.2.0-23.28) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
run-parts: executing /etc/kernel/postinst.d/dkms 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
update-initramfs: Generating /boot/initrd.img-4.2.0-23-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.2.0-23-generic
Found initrd image: /boot/initrd.img-4.2.0-23-generic
Found linux image: /boot/vmlinuz-4.2.0-22-generic
Found initrd image: /boot/initrd.img-4.2.0-22-generic
Found linux image: /boot/vmlinuz-4.2.0-21-generic
Found initrd image: /boot/initrd.img-4.2.0-21-generic
Adding boot menu entry for EFI firmware configuration
done
Setting up linux-image-extra-4.2.0-23-generic (4.2.0-23.28) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
run-parts: executing /etc/kernel/postinst.d/dkms 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
update-initramfs: Generating /boot/initrd.img-4.2.0-23-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.2.0-23-generic
Found initrd image: /boot/initrd.img-4.2.0-23-generic
Found linux image: /boot/vmlinuz-4.2.0-22-generic
Found initrd image: /boot/initrd.img-4.2.0-22-generic
Found linux image: /boot/vmlinuz-4.2.0-21-generic
Found initrd image: /boot/initrd.img-4.2.0-21-generic
Adding boot menu entry for EFI firmware configuration
done
Setting up linux-image-generic (4.2.0.23.25) ...
Setting up linux-headers-4.2.0-23 (4.2.0-23.28) ...
Setting up linux-headers-4.2.0-23-generic (4.2.0-23.28) ...
Examining /etc/kernel/header_postinst.d.
run-parts: executing /etc/kernel/header_postinst.d/dkms 4.2.0-23-generic /boot/vmlinuz-4.2.0-23-generic
Setting up linux-headers-generic (4.2.0.23.25) ...
Setting up linux-generic (4.2.0.23.25) ...
Setting up linux-signed-image-4.2.0-23-generic (4.2.0-23.28) ...
warning: file-aligned section .text extends beyond end of file
warning: checksum areas are greater than image size. Invalid section table?
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.2.0-23-generic
Found initrd image: /boot/initrd.img-4.2.0-23-generic
Found linux image: /boot/vmlinuz-4.2.0-22-generic
Found initrd image: /boot/initrd.img-4.2.0-22-generic
Found linux image: /boot/vmlinuz-4.2.0-21-generic
Found initrd image: /boot/initrd.img-4.2.0-21-generic
Adding boot menu entry for EFI firmware configuration
done
Setting up linux-signed-image-generic (4.2.0.23.25) ...
Setting up linux-signed-generic (4.2.0.23.25) ...
Setting up linux-libc-dev:AMD64 (4.2.0-23.28) ...
Vous remarquerez peut-être que certaines des lignes se lisent:
warning: file-aligned section .text extends beyond end of file
warning: checksum areas are greater than image size. Invalid section table?
Qu'est-ce que cela signifie exactement et est-ce quelque chose qui devrait m'inquiéter?
Informations sur le système d'exploitation:
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily
Flavour: GNOME
GNOME Version: 3.18
J'ai trouvé une page http://www.rodsbooks.com/efi-bootloaders/secureboot.html qui mentionne cet avertissement:
[...]
warning: file-aligned section .text extends beyond end of file warning: checksum areas are greater than image size. Invalid section table?[...]
Cet exemple montre deux avertissements. Je ne prétends pas les comprendre parfaitement, mais ils ne semblent pas faire de mal. Du moins, les binaires du noyau Linux que j'ai signés et qui ont généré ces avertissements ont bien fonctionné. (De tels avertissements semblent être moins fréquents en 2015 qu'ils ne l'étaient il y a quelques années.).
[...]
Si cet auteur n'est pas inquiet, alors je ne le suis pas non plus.