[Bug 281589] FreeBSD 13.4 bootloader rev 3.0 fails to load kernel with mfsbsd-created image

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 19 Sep 2024 14:13:29 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281589

            Bug ID: 281589
           Summary: FreeBSD 13.4 bootloader rev 3.0 fails to load kernel
                    with mfsbsd-created image
           Product: Base System
           Version: 13.4-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: karthigeyanh@gmail.com

Created attachment 253664
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=253664&action=edit
Failed to load kerel

Overview:  FreeBSD 13.4 bootloader rev 3.0 fails with mfsbsd-created image
Steps to Reproduce: 
        - Create a mfbsd image with FreeBSD13.4 ISO with either master or 2.3
branch of mfbsd
        - Load it via pxe

Brief note on the issue.

When I attempted to create an image with mfsbsd and install it on a KVM VM, the
bootloader failed to load the kernel. However, when using bootloader revision
1.0 with the same image, both the kernel and mfsroot loaded into memory
successfully. After several attempts, I  created the mfsbsd image with the
kernel and mfsroot in an uncompressed format (instead of .gz) resolved the
issue. I’m uncertain whether the bootstrap loader has stopped supporting or
decompressing .gz files.

Thanks!!

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