This is a note to let you know that I've just added the patch titled
ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpi-processor-idle-check-acpi_fetch_acpi_dev-return.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4d4d6652d3a41a23e87447ba3b13deb4a581b581
Author: Li Zhong <floridsleeves@xxxxxxxxx>
Date: Fri Sep 2 00:37:30 2022 -0700
ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value
[ Upstream commit 2437513a814b3e93bd02879740a8a06e52e2cf7d ]
The return value of acpi_fetch_acpi_dev() could be NULL, which would
cause a NULL pointer dereference to occur in acpi_device_hid().
Signed-off-by: Li Zhong <floridsleeves@xxxxxxxxx>
[ rjw: Subject and changelog edits, added empty line after if () ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 9f40917c49ef..4d1dd255c122 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1134,6 +1134,9 @@ static int acpi_processor_get_lpi_info(struct acpi_processor *pr)
status = acpi_get_parent(handle, &pr_ahandle);
while (ACPI_SUCCESS(status)) {
d = acpi_fetch_acpi_dev(pr_ahandle);
+ if (!d)
+ break;
+
handle = pr_ahandle;
if (strcmp(acpi_device_hid(d), ACPI_PROCESSOR_CONTAINER_HID))
