Works well, thank you for the update.
On Fri, Mar 26, 2021, 7:31 AM Armandoobnaiala <1835...@bugs.launchpad.net> wrote: > update-initramfs: Generating /boot/initrd.img-5.8.0-45-generic > /usr/sbin/mkinitramfs: 177: COMPRESS: parameter not set > update-initramfs: failed for /boot/initrd.img-5.8.0-45-generic with 2. > > > ** Changed in: initramfs-tools (Ubuntu Focal) > Assignee: (unassigned) => Armandoobnaiala (armando1986) > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1835660 > > Title: > initramfs unpacking failed > > Status in OEM Priority Project: > New > Status in grub2 package in Ubuntu: > Invalid > Status in initramfs-tools package in Ubuntu: > Invalid > Status in linux package in Ubuntu: > Fix Released > Status in grub2 source package in Focal: > Invalid > Status in initramfs-tools source package in Focal: > Invalid > Status in linux source package in Focal: > Fix Released > Status in grub2 source package in Groovy: > Invalid > Status in initramfs-tools source package in Groovy: > Invalid > Status in linux source package in Groovy: > Fix Released > Status in grub2 source package in Hirsute: > Invalid > Status in initramfs-tools source package in Hirsute: > Invalid > Status in linux source package in Hirsute: > Fix Released > > Bug description: > "initramfs unpacking failed: Decoding failed", message appears on > boot up. > > If I "update-initramfs" using gzip instead of lz, then boot up passes > without decoding failed message. > > --- > > However, we currently believe that the decoding error reported in > dmesg is actually harmless and has no impact on usability on the > system. > > Switching from lz4 to gzip compression, simply papers over the > warning, without any benefits, and slows down boot. > > Kernel should be fixed to correctly parse lz4 compressed initrds, or > at least lower the warning, to not be user visible as an error. > > [Impact] > > * Decoding failure messages in dmsg with a single lz4 initrd > > * Multiple lz4 compressed initrds cannot be decompressed by kernel, > when loaded by grub > > * Multiple lz4 compressed initrds cannot be decompressed by kernel, > when there is padding between them > > [Test Case] > > * Create empty padding with $ dd if=/dev/zero of=pad4 bs=1 count=4 > > * Create an lz4 compressed initrd with a single test-file in it with > some content. I.e. echo "second-initrd" > test-file, and then pack > that with cpio hewc owned by root & lz4 -l. > > * Create a combined padded initrd of stock initrd, pad4, and the > test-marker initrd created above. > > * Boot above with "break=top" kernel command line. > > * With broken kernels, there should be dmesg error message that > decoding failed, and one will observe that /test-file does not exist > in the shell. > > * With fixed kernel, /test-file in the initrd shell should exist, and > should have the expected content "second-initrd". > > * The alignment and padding in the above test case depends on the > size of the first initrd => if a given padded initrd does not > reproduce the problem, try varying the size of the first initrd or > that of the padding between 0..4. > > > [Where problems could occur] > > * This changes compatible lz4 decompressor in the kernel, which can > also be used by other kernel modules such as cryptography, squashfs, > zram, f2fs, comprssed kernel image, pstore. For example, previously > rejected files with "bogus" length and extra padding may now be > accepted, whereas they were previously getting rejected by the > decompressor. > > * Ideally kernel should switch to the stable lz4 format which has > better specification of end of stream. > > To manage notifications about this bug go to: > https://bugs.launchpad.net/oem-priority/+bug/1835660/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1835660 Title: initramfs unpacking failed To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1835660/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
