Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

[korewaChino]

affects all of our bootc container builds, using bootc install and bootc-image-builder.

upgrading from an existing bootc installed machine also breaks

[    0.980404] /dev/root: Can't open blockdev
[    0.981116] VFS: Cannot open root device "UUID=96991ead-b3b0-48ef-a347-f8c3c0f86bf1" or unknown-block(0,0): error -6
[    0.982578] Please append a correct "root=" boot option; here are the available partitions:
[    0.983625] 0b00         1048575 sr0 
[    0.983627]  driver: sr
[    0.984593] List of all bdev filesystems:
[    0.985169]  ext3
[    0.985171]  ext2
[    0.985575]  ext4
[    0.985963]  btrfs
[    0.986318] 
[    0.987030] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[    0.987874] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.11.2-300.fc41.x86_64 #1
[    0.988690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS edk2-20240813-1.fc40 08/13/2024
[    0.989607] Call Trace:
[    0.990007]  <TASK>
[    0.990409]  dump_stack_lvl+0x5d/0x80
[    0.990952]  panic+0x155/0x316
[    0.991418]  mount_root_generic+0x1ce/0x270
[    0.991981]  prepare_namespace+0x1ec/0x240
[    0.992520]  kernel_init_freeable+0x2d7/0x310
[    0.993130]  ? __pfx_kernel_init+0x10/0x10
[    0.993737]  kernel_init+0x1a/0x140
[    0.995742]  ret_from_fork+0x34/0x50
[    0.996315]  ? __pfx_kernel_init+0x10/0x10
[    0.997007]  ret_from_fork_asm+0x1a/0x30
[    0.997630]  </TASK>
[    0.998160] Kernel Offset: 0x15000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[    0.999467] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---

[korewaChino]

Seems like the initramfs is not being loaded???

[korewaChino]

 │linux ($root)/boot/ostree/default-934843069bf87177967fce88d639065274aed6f533274ba4f8fc40639e64d\│
 │c98/vmlinuz-6.11.2-300.fc41.x86_64 root=UUID=96991ead-b3b0-48ef-a347-f8c3c0f86bf1 rw boot=UUID=\│
 │eefb14bf-bf8f-43bf-b188-a7ae1797d533 rw console=tty0 console=ttyS0 init=/ostree/boot.1/default/\│
 │934843069bf87177967fce88d639065274aed6f533274ba4f8fc40639e64dc98/0/usr/lib/ostree/ostree-prepar\│
 │e-root ostree=/ostree/boot.1/default/934843069bf87177967fce88d639065274aed6f533274ba4f8fc40639e\│
 │64dc98/0                                                                                        │
 │                                                                                                │