Comment 1 for bug 2027575

Lunar fix is attached.

Tested locally after downloading a lunar image:

$ autopkgtest initramfs-tools -- qemu autopkgtest-lunar-amd64.img
It uses the package in updates, therefore this fails:
Begin: Running /scripts/local-bottom ... done.
...
...
[ 17.069410] Call Trace:
[ 17.069504] <TASK>
[ 17.069594] dump_stack_lvl+0x48/0x70
[ 17.069747] dump_stack+0x10/0x20
[ 17.069866] panic+0x37b/0x3c0
[ 17.070029] out_of_memory+0x36c/0x370
[ 17.070226] __alloc_pages_may_oom+0x112/0x1e0
[ 17.070480] __alloc_pages_slowpath.constprop.0+0x4c7/0xa20
[ 17.070761] __alloc_pages+0x31d/0x350
[ 17.070992] alloc_pages+0x90/0x1a0
[ 17.071179] __get_free_pages+0x11/0x50
[ 17.071362] pgd_alloc+0x20/0xc0
[ 17.071548] mm_init+0x18a/0x390
[ 17.071730] dup_mm.constprop.0+0x51/0x120
[ 17.071933] copy_process+0xae3/0x1570
[ 17.072165] kernel_clone+0xbd/0x440
[ 17.072373] __do_sys_clone+0x76/0xb0
[ 17.072587] __x64_sys_clone+0x25/0x40
[ 17.072816] do_syscall_64+0x5b/0x90
[ 17.073027] ? syscall_exit_to_user_mode+0x29/0x50
[ 17.073269] ? do_syscall_64+0x67/0x90
[ 17.073446] ? do_user_addr_fault+0x1e8/0x720
[ 17.073654] ? exit_to_user_mode_prepare+0x30/0xb0
[ 17.073871] ? irqentry_exit_to_user_mode+0x9/0x20
[ 17.074089] ? irqentry_exit+0x43/0x50
[ 17.074322] ? exc_page_fault+0x91/0x1b0
[ 17.074474] entry_SYSCALL_64_after_hwframe+0x72/0xdc
[ 17.074723] RIP: 0033:0x7fb27d64be07
[ 17.074897] Code: 00 66 90 f3 0f 1e fa 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 0
[ 17.075588] RSP: 002b:00007ffc9dba5538 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
[ 17.075976] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb27d64be07
[ 17.076359] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
[ 17.076669] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[ 17.077004] R10: 00007fb27d567a10 R11: 0000000000000246 R12: 0000000000000001
[ 17.077354] R13: 0000556e56d9f5f0 R14: 0000556e56d9d798 R15: 0000000000000000
[ 17.077722] </TASK>
[ 17.078438] Kernel Offset: 0x2c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[ 17.079602] ---[ end Kernel panic - not syncing: System is deadlocked on memory ]---
qemu-system-x86_64: terminating on signal 15 from pid 7616 (timeout)
autopkgtest [14:15:54]: test net: -----------------------]
autopkgtest [14:15:55]: test net: - - - - - - - - - - results - - - - - - - - - -
net FAIL non-zero exit status 124
autopkgtest [14:15:55]: @@@@@@@@@@@@@@@@@@@@ summary
amd64-klibc PASS
amd64-busybox PASS
amd64-ata-only PASS
amd64-virtio-only PASS
amd64-separate-usr PASS
amd64-panic-shell PASS
command1 PASS
net FAIL non-zero exit status 124
qemu-system-x86_64: terminating on signal 15 from pid 40557 (/usr/bin/python3)

$ autopkgtest ~/canonical/initramf-tools/initramfs-tools_0.142ubuntu3.dsc -- qemu autopkgtest-lunar-amd64.img
This is the fix and the results are good:

net PASS
autopkgtest [14:32:26]: @@@@@@@@@@@@@@@@@@@@ summary
amd64-klibc PASS
amd64-busybox PASS
amd64-ata-only PASS
amd64-virtio-only PASS
amd64-separate-usr PASS
amd64-panic-shell PASS
command1 PASS
net PASS
qemu-system-x86_64: terminating on signal 15 from pid 46267 (/usr/bin/python3)