[ipxe-devel] initrd corruption since commit ef038491858cb51f8aa17b1f6e50444d2e627413

[Sven Dreyer]

Dear iPXE developers,

after the easter holidays, I just noticed that I can neither boot my 
Debian amd64 nfsroot system nor my Windows 10 PE x86_64 any longer.

The iPXE Debian nfsroot thing worked like a charm with various Debian 
releases on amd64 as well as on i386.

Now it doesn't boot because the initrd seems corrupted:
Initramfs unpacking failed: invalid magic at start of compressed archive

Comparable problems apply to wimboot 2.8.0 trying to boot a Windows PE 
10.0-26100 x86_64:
Unexpected output length 0x0 (expected 0x8000)
Could not patch WIM boot.wim

Setup is:
- x86_64 on BIOS (not UEFI)
- PXE boot configured
- Integrated PXE loads ipxe.pxe (self compiled from git master)
- iPXE loads script
- script for Debian nfsroot loads both initrd and kernel via nfs:// uri 
and boots kernel with append parameters
- script for Windows PE loads wimboot 2.8.0 and further windows files 
over HTTP

What I noticed is:
- The problem occurs with ipxe.pxe, undionly.kpxe and undionly.kkpxe
- When switching to UEFI (and using ipxe.efi), the problem does NOT occur
- A git bisect reveals that ef038491858cb51f8aa17b1f6e50444d2e627413 is 
the first bad commit.
- Before commit ef038491858cb51f8aa17b1f6e50444d2e627413, everything 
works for me.

Is there anything I can do to track this problem down?

Thanks and best regards,
Sven