Public bug reported:
Working on 16.04 and trying to solve some unrelated issues due to a
complex initrd set-up I discovered that the included "modinfo" tool
doesn't work, whether given just a module name or an absolute path to
the .ko file.
In this case it always reports, e.g:
(initramfs) pwd
/lib/modules/4.4.0-21-generic/kernel/drivers/md
(initramfs) modinfo dm-crypt
modinfo: can't open '/4.4.0-21-generic/': No such file or directory
(initramfs) modinfo /lib/modules/4.4.0-21-generic/kernel/drivers/md/dm-crypt.ko
modinfo: can't open '/4.4.0-21-generic/': No such file or directory
There seems there may be a related issue with modprobe too, as I've
found it doesn't always insert a module when instructed to - also using
either just name, or absolute path. In the specific case here I was
working with a LUKS/dm-crypt rootfs, where the initrd.img had been
generated using "MODULES=dep" and hadn't included dm-crypt.ko.
I connected a USB storage device with an identical root file-system
(same kernel version, etc.) at /mnt/USB/ and was trying to use:
(initramfs) modprobe -v -d /mnt/USB dm-crypt
modprobe: FATAL: Module dm-crypt not found in directory
/mnt/USB/lib/modules/4.4.0-21-generic
I'm *assuming* this is because despite setting the alternate root
directory with "-d" it is still looking at the "modules.dep" in
/lib/modules/4.4.0-21-generic rather than prefixing the "-d" alternate
root.
Using a chroot the module(s) can be loaded and the block device
unlocked:
(initramfs) chroot /mnt/USB
(initramfs) modprobe dm-crypt
(initramfs) modprobe aesni-intel
(initramfs) modprobe xts
(initramfs) exit
(initramfs) grep dm_crypt /proc/modules
dm_crypt 28672 0 - Live 0xffffffffc02fa000
(initramfs) LD_LIBRARY_PATH=/mnt/USB/lib/x86_64-gnu-linux
/mnt/USB/sbin/cryptsetup open /dev/sda4 LUKS_VG02 --type luks
(initramfs) blkid /dev/mapper/LUKS_VG02
/dev/mapper/LUKS_VG02: UUID="xxxx...xxxx" TYPE="LVM2_member"
** Affects: busybox (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1574107
Title:
busybox-initramfs: modinfo reports "can't open '/${VERSION}/': No such
file or directory"
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/busybox/+bug/1574107/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
