From: Cryolitia PukNgae <cryolitia@xxxxxxxxxxxxx> On the Honor FMB-P-PCB laptop, an incorrect ACPI table causes sdw_intel_acpi_scan to pass a NULL pointer as start_object to acpi_walk_namespace() when calling it, which eventually causes the kernel to report a NULL pointer dereference[1]. 1. https://gist.github.com/Cryolitia/a860ffc97437dcd2cd988371d5b73ed7 Signed-off-by: Cryolitia PukNgae <cryolitia@xxxxxxxxxxxxx> --- drivers/acpi/acpica/nsxfeval.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/acpica/nsxfeval.c b/drivers/acpi/acpica/nsxfeval.c index f9d059647cc52e94ce013af3382addba338820e8..c1f318ea7d5fcd846dc158b155286a6f5bba4cff 100644 --- a/drivers/acpi/acpica/nsxfeval.c +++ b/drivers/acpi/acpica/nsxfeval.c @@ -564,7 +564,7 @@ acpi_walk_namespace(acpi_object_type type, /* Parameter validation */ - if ((type > ACPI_TYPE_LOCAL_MAX) || + if ((type > ACPI_TYPE_LOCAL_MAX) || (start_object == NULL) || (!max_depth) || (!descending_callback && !ascending_callback)) { return_ACPI_STATUS(AE_BAD_PARAMETER); } --- base-commit: 24ea63ea387714634813359e2c8e0e6c36952f73 change-id: 20250815-acpi_fix-3724e6c4da02 Best regards, -- Cryolitia PukNgae <cryolitia@xxxxxxxxxxxxx>
