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apport-collect 1840945
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This change has been made by an automated script, maintained by the
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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1840945
Title:
Concatenated lz4 initrds don't work
Status in linux package in Ubuntu:
Incomplete
Bug description:
Concatenating multiple initrds works fine with gzipped initrds.
(microcode+gzip+gzip) => the kernel properly decompresses that
With lz4, it can't decompress anything after the first lz4:
(microcode+lz4+whatever) => it doesn't decompress whatever.
To reproduce:
Get vmlinuz and initrd.img from an eoan daily build and put them in a
directory.
Create an lz4 (or gzip or uncompressed cpio, it doesn't matter):
# date > date.txt
# echo date.txt | cpio -oH newc | lz4 > date.img
Concatenate them:
# cat initrd.img.original date.img > initrd.img
Boot them:
# kvm -m 512 -kernel vmlinuz -initrd initrd.img -append rdinit=/bin/sh
Then inside kvm:
# ls /date.txt
The additional file doesn't exist.
`dmesg | grep -i initramfs` reports:
Trying to unpack rootfs image as initramfs...
Initramfs unpacking failed: Decoding failed
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