averello/linux-stable-mirror
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2026-07-08 18:13:59 +02:00
Code Issues Packages Projects Releases Wiki Activity

ACPICA: Avoid walking the ACPI Namespace if it is not there

Browse Source 
ACPICA commit b1c3656ef4950098e530be68d4b589584f06cddc

Prevent acpi_ns_walk_namespace() from crashing when called with
start_node equal to ACPI_ROOT_OBJECT if the Namespace has not been
instantiated yet and acpi_gbl_root_node is NULL.

For instance, this can happen if the kernel is run with "acpi=off"
in the command line.

Link: https://github.com/acpica/acpica/commit/b1c3656ef4950098e530be68d4b589584f06cddc
Link: https://lore.kernel.org/linux-acpi/CAJZ5v0hJWW_vZ3wwajE7xT38aWjY7cZyvqMJpXHzUL98-SiCVQ@mail.gmail.com/
Reported-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki
2022-03-07 20:28:26 +01:00
parent ae57857b9b
commit 0c9992315e
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/acpi/acpica/nswalk.c
+3
View File
@@ -169,6 +169,9 @@ acpi_ns_walk_namespace(acpi_object_type type,
if (start_node == ACPI_ROOT_OBJECT) {
start_node = acpi_gbl_root_node;
if (!start_node) {
return_ACPI_STATUS(AE_NO_NAMESPACE);
}
}
/* Null child means "get first node" */