From 0985838a9c87f4870ea9135df9d339fc5846994c Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Fri, 14 Apr 2023 16:00:48 +0200 Subject: [PATCH] ACPI: bus: Ensure that notify handlers are not running after removal [ Upstream commit faae443738c6f0dac9b0d3d11d108f6911a989a9 ] Currently, acpi_device_remove_notify_handler() may return while the notify handler being removed is still running which may allow the module holding that handler to be torn down prematurely. Address this issue by making acpi_device_remove_notify_handler() wait for the handling of all the ACPI events in progress to complete before returning. Fixes: 5894b0c46e49 ("ACPI / scan: Move bus operations and notification routines to bus.c") Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/bus.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 3b6146b..a16b7de7 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -586,6 +586,7 @@ static void acpi_device_remove_notify_handler(struct acpi_device *device, acpi_remove_notify_handler(device->handle, type, acpi_notify_device); } + acpi_os_wait_events_complete(); } /* Handle events targeting \_SB device (at present only graceful shutdown) */ -- 2.7.4