This is a note to let you know that I've just added the patch titled
ACPICA: debugger: check status of acpi_evaluate_object() in acpi_db_walk_for_fields()
to the 6.1-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:
acpica-debugger-check-status-of-acpi_evaluate_object.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit baf889f8b6349ef8268478fa63ebea1a2d41410a
Author: Nikita Kiryushin <kiryushin@xxxxxxxx>
Date: Fri Mar 22 21:07:53 2024 +0300
ACPICA: debugger: check status of acpi_evaluate_object() in acpi_db_walk_for_fields()
[ Upstream commit 40e2710860e57411ab57a1529c5a2748abbe8a19 ]
ACPICA commit 9061cd9aa131205657c811a52a9f8325a040c6c9
Errors in acpi_evaluate_object() can lead to incorrect state of buffer.
This can lead to access to data in previously ACPI_FREEd buffer and
secondary ACPI_FREE to the same buffer later.
Handle errors in acpi_evaluate_object the same way it is done earlier
with acpi_ns_handle_to_pathname.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Link: https://github.com/acpica/acpica/commit/9061cd9a
Fixes: 5fd033288a86 ("ACPICA: debugger: add command to dump all fields of particular subtype")
Signed-off-by: Nikita Kiryushin <kiryushin@xxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/acpi/acpica/dbnames.c b/drivers/acpi/acpica/dbnames.c
index b91155ea9c343..c9131259f717b 100644
--- a/drivers/acpi/acpica/dbnames.c
+++ b/drivers/acpi/acpica/dbnames.c
@@ -550,8 +550,12 @@ acpi_db_walk_for_fields(acpi_handle obj_handle,
ACPI_FREE(buffer.pointer);
buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
- acpi_evaluate_object(obj_handle, NULL, NULL, &buffer);
-
+ status = acpi_evaluate_object(obj_handle, NULL, NULL, &buffer);
+ if (ACPI_FAILURE(status)) {
+ acpi_os_printf("Could Not evaluate object %p\n",
+ obj_handle);
+ return (AE_OK);
+ }
/*
* Since this is a field unit, surround the output in braces
*/
