Merge tag 'acpi-5.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fix from Rafael Wysocki:
"Fix a recent ACPI-related regression in the PCI subsystem that
introduced a NULL pointer dereference possible to trigger from
user space via sysfs on some systems"
* tag 'acpi-5.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PCI: ACPI: Check parent pointer in acpi_pci_find_companion()
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 0f40943a..260a06f 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -1249,6 +1249,9 @@
bool check_children;
u64 addr;
+ if (!dev->parent)
+ return NULL;
+
down_read(&pci_acpi_companion_lookup_sem);
adev = pci_acpi_find_companion_hook ?
