linux-kernel - [PATCH v1 01/20] ACPICA: haiku: Fix invalid value used for semaphores

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <4599054.LvFx2qVVIh@rjwysocki.net>
Date: Thu, 29 Aug 2024 20:21:43 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux ACPI <linux-acpi@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Bob Moore <robert.moore@...el.com>,
 Saket Dumbre <saket.dumbre@...el.com>
Subject: [PATCH v1 01/20] ACPICA: haiku: Fix invalid value used for semaphores

From: Adrien Destugues <adrien.destugues@...nsource.viveris.fr>

ACPICA commit 49fe4f25483feec2f685b204ef19e28d92979e95

In Haiku, semaphores are represented by integers, not pointers.
So, we can't use NULL as the invalid/destroyed value, the correct value
is -1. Introduce a platform overridable define to allow this.

Fixes #162 (which was closed after coming to the conclusion that this
should be done, but the change was never done).

Link: https://github.com/acpica/acpica/commit/49fe4f25
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/acpi/acpica/utdelete.c | 4 ++--
 drivers/acpi/acpica/utinit.c   | 2 +-
 include/acpi/platform/acenv.h  | 6 ++++++
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/acpi/acpica/utdelete.c b/drivers/acpi/acpica/utdelete.c
index 8d7736d2d269..c85bfa13ac1e 100644
--- a/drivers/acpi/acpica/utdelete.c
+++ b/drivers/acpi/acpica/utdelete.c
@@ -140,7 +140,7 @@ static void acpi_ut_delete_internal_obj(union acpi_operand_object *object)
 			(void)
 			    acpi_os_delete_semaphore
 			    (acpi_gbl_global_lock_semaphore);
-			acpi_gbl_global_lock_semaphore = NULL;
+			acpi_gbl_global_lock_semaphore = ACPI_SEMAPHORE_NULL;
 
 			acpi_os_delete_mutex(object->mutex.os_mutex);
 			acpi_gbl_global_lock_mutex = NULL;
@@ -157,7 +157,7 @@ static void acpi_ut_delete_internal_obj(union acpi_operand_object *object)
 				  object, object->event.os_semaphore));
 
 		(void)acpi_os_delete_semaphore(object->event.os_semaphore);
-		object->event.os_semaphore = NULL;
+		object->event.os_semaphore = ACPI_SEMAPHORE_NULL;
 		break;
 
 	case ACPI_TYPE_METHOD:
diff --git a/drivers/acpi/acpica/utinit.c b/drivers/acpi/acpica/utinit.c
index 92fbaef161a7..6d78504e9fbc 100644
--- a/drivers/acpi/acpica/utinit.c
+++ b/drivers/acpi/acpica/utinit.c
@@ -154,7 +154,7 @@ acpi_status acpi_ut_init_globals(void)
 
 	/* Global Lock support */
 
-	acpi_gbl_global_lock_semaphore = NULL;
+	acpi_gbl_global_lock_semaphore = ACPI_SEMAPHORE_NULL;
 	acpi_gbl_global_lock_mutex = NULL;
 	acpi_gbl_global_lock_acquired = FALSE;
 	acpi_gbl_global_lock_handle = 0;
diff --git a/include/acpi/platform/acenv.h b/include/acpi/platform/acenv.h
index 337ffa931ee8..3f31df09a9d6 100644
--- a/include/acpi/platform/acenv.h
+++ b/include/acpi/platform/acenv.h
@@ -252,6 +252,12 @@
 #define ACPI_RELEASE_GLOBAL_LOCK(Glptr, pending) pending = 0
 #endif
 
+/* NULL/invalid value to use for destroyed or not-yet-created semaphores. */
+
+#ifndef ACPI_SEMAPHORE_NULL
+#define ACPI_SEMAPHORE_NULL NULL
+#endif
+
 /* Flush CPU cache - used when going to sleep. Wbinvd or similar. */
 
 #ifndef ACPI_FLUSH_CPU_CACHE
-- 
2.43.0