** Description changed:

  memory leak on Spark which is visible right after boot:
  root@localhost:/sys/kernel/debug# cat kmemleak
  unreferenced object 0xffff40ec0430e760 (size 32):
    comm "swapper/0", pid 1, jiffies 4294667675
    hex dump (first 32 bytes):
      01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    backtrace (crc f1da05aa):
      kmemleak_alloc+0xe4/0x128
      __kmalloc_noprof+0x2b0/0x4b8
      acpi_ut_initialize_buffer+0xbc/0x108
      acpi_evaluate_object+0x31c/0x368
      acpi_evaluate_dsm+0xc0/0x170
      pci_acpi_preserve_config+0x88/0xf8
      pci_register_host_bridge+0x2dc/0x5a8
      pci_create_root_bus+0x90/0xe8
      acpi_pci_root_create+0x174/0x2d0
      pci_acpi_scan_root+0x198/0x2d0
      acpi_pci_root_add+0x1a0/0x370
      acpi_bus_attach+0x1f4/0x378
      acpi_dev_for_one_check+0x54/0x80
      device_for_each_child+0x70/0xe8
      acpi_dev_for_each_child+0x4c/0xa0
      acpi_bus_attach+0x26c/0x378
  
- Upstream fix was introduced with https://lore.kernel.org/linux-
- pci/20250825223731.GA808746@bhelgaas/T/#t
+ Upstream fix was introduced with
+ https://patch.msgid.link/[email protected]
  
  While working on it, I also realized we are missing:
  1f2768b6a3ee7 PCI: Fix reference leak in pci_alloc_child_bus()
  804443c1f2788 PCI: Fix reference leak in pci_register_host_bridge()
  We should have above as well. Let me know what do you think about the last 
two patches and if those can be included separately from this

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https://bugs.launchpad.net/bugs/2121451

Title:
  backport: "ACPI/PCI: Fix memory leak fix in pci_acpi_preserve_config"

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