linux-kernel - [PATCH 3.12 084/142] ACPICA: Utilities: Fix memory leak in acpi_ut_copy_iobject_to

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Date:	Fri, 26 Sep 2014 11:44:55 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	"David E. Box" <david.e.box@...ux.intel.com>,
	Bob Moore <robert.moore@...el.com>,
	Lv Zheng <lv.zheng@...el.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 084/142] ACPICA: Utilities: Fix memory leak in acpi_ut_copy_iobject_to_iobject

From: "David E. Box" <david.e.box@...ux.intel.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce upstream.

Adds return status check on copy routines to delete the allocated destination
object if either copy fails. Reported by Colin Ian King on bugs.acpica.org,
Bug 1087.
The last applicable commit:
 Commit: 3371c19c294a4cb3649aa4e84606be8a1d999e61
 Subject: ACPICA: Remove ACPI_GET_OBJECT_TYPE macro

Link: https://bugs.acpica.org/show_bug.cgi?id=1087
Reported-by: Colin Ian King <colin.king@...onical.com>
Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
Signed-off-by: Bob Moore <robert.moore@...el.com>
Signed-off-by: Lv Zheng <lv.zheng@...el.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/acpi/acpica/utcopy.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/acpi/acpica/utcopy.c b/drivers/acpi/acpica/utcopy.c
index 1731c27c36a6..2cac1d1f3863 100644
--- a/drivers/acpi/acpica/utcopy.c
+++ b/drivers/acpi/acpica/utcopy.c
@@ -1001,5 +1001,11 @@ acpi_ut_copy_iobject_to_iobject(union acpi_operand_object *source_desc,
 		status = acpi_ut_copy_simple_object(source_desc, *dest_desc);
 	}
 
+	/* Delete the allocated object if copy failed */
+
+	if (ACPI_FAILURE(status)) {
+		acpi_ut_remove_reference(*dest_desc);
+	}
+
 	return_ACPI_STATUS(status);
 }
-- 
2.1.0

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