Related report with binary proof of initrd RAM corruption (2026) We are seeing the same "Initramfs unpacking failed: ZSTD-compressed data is corrupt" message under warm reboot stress, but with fatal consequences on a live+persistence product (not desktop login continuing).
Environment: - GRUB grub-efi-amd64-signed 2.06-2ubuntu14.8 (post LP #1842320 fix) - linux-image-6.17.0-41-generic - External initrd ~177 MiB from GRUB (/current/initrd) - Dell OptiPlex AIO Plus 7410, 32 GB RAM, Secure Boot disabled Symptoms (~16 reboot stress test): - Intermittent: initramfs hang, "init not found", "Segmentation fault" stuck on screen - Kernel ZSTD error on ~4/15 logged boots (boot sometimes continues) - 1/16 boots hung with no userspace logs - Sometimes boots despite errors — unknown runtime state Critical finding (proven on failed boot): overlay.ko extracted from on-disk initrd vs copy in runtime initramfs RAM: - Same size: 484313 bytes - MD5 differs; cmp -l shows exactly ONE byte different at offset 194603 (0x01 → 0x00) - insmod: "Key was rejected by service"; modprobe overlay fails - Persistence overlay cannot mount; boot stops in initramfs This suggests initrd contents are intermittently corrupted in RAM after GRUB load, not merely a cosmetic embedded-initramfs ZSTD warning. GRUB 14.8 did not eliminate it. Attachments and full analysis: [NEW BUG URL — add after filing] Please consider this related to GRUB/initrd memory integrity issues discussed in this bug. Filing separately because we have binary proof and fatal live-boot impact. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2007743 Title: intramfs Failed: ZSTD-compressed data To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-unsigned/+bug/2007743/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
