linux-kernel - [PATCH] platform/x86/intel/ifs: Annotate work queue on stack so object debug does not complain

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Message-Id: <20230523105400.674152-1-darcari@redhat.com>
Date:   Tue, 23 May 2023 06:54:00 -0400
From:   David Arcari <darcari@...hat.com>
To:     platform-driver-x86@...r.kernel.org
Cc:     David Arcari <darcari@...hat.com>,
        Jithu Joseph <jithu.joseph@...el.com>,
        Ashok Raj <ashok.raj@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: [PATCH] platform/x86/intel/ifs: Annotate work queue on stack so object debug does not complain

Object Debug results in the following warning while attempting to load
ifs firmware:

[  220.007422] ODEBUG: object 000000003bf952db is on stack 00000000e843994b, but NOT annotated.
[  220.007459] ------------[ cut here ]------------
[  220.007461] WARNING: CPU: 0 PID: 11774 at lib/debugobjects.c:548 __debug_object_init.cold+0x22e/0x2d5
[  220.137476] RIP: 0010:__debug_object_init.cold+0x22e/0x2d5
[  220.254774] Call Trace:
[  220.257641]  <TASK>
[  220.265606]  scan_chunks_sanity_check+0x368/0x5f0 [intel_ifs]
[  220.288292]  ifs_load_firmware+0x2a3/0x400 [intel_ifs]
[  220.332793]  current_batch_store+0xea/0x160 [intel_ifs]
[  220.357947]  kernfs_fop_write_iter+0x355/0x530
[  220.363048]  new_sync_write+0x28e/0x4a0
[  220.381226]  vfs_write+0x62a/0x920
[  220.385160]  ksys_write+0xf9/0x1d0
[  220.399421]  do_syscall_64+0x59/0x90
[  220.440635]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[  220.566845] ---[ end trace 3a01b299db142b41 ]---

Correct this by calling INIT_WORK_ONSTACK instead of INIT_WORK.

Fixes: 684ec215706d ("platform/x86/intel/ifs: Authenticate and copy to secured memory")

Signed-off-by: David Arcari <darcari@...hat.com>
Cc: Jithu Joseph <jithu.joseph@...el.com>
Cc: Ashok Raj <ashok.raj@...el.com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Hans de Goede <hdegoede@...hat.com>
Cc: Mark Gross <markgross@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Dan Williams <dan.j.williams@...el.com>
Cc: linux-kernel@...r.kernel.org
Cc: stable@...r.kernel.org
---
 drivers/platform/x86/intel/ifs/load.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/intel/ifs/load.c
index 61dffb4c8a1d..e6ae8265f3a3 100644
--- a/drivers/platform/x86/intel/ifs/load.c
+++ b/drivers/platform/x86/intel/ifs/load.c
@@ -208,7 +208,7 @@ static int scan_chunks_sanity_check(struct device *dev)
 			continue;
 		reinit_completion(&ifs_done);
 		local_work.dev = dev;
-		INIT_WORK(&local_work.w, copy_hashes_authenticate_chunks);
+		INIT_WORK_ONSTACK(&local_work.w, copy_hashes_authenticate_chunks);
 		schedule_work_on(cpu, &local_work.w);
 		wait_for_completion(&ifs_done);
 		if (ifsd->loading_error) {
-- 
2.27.0