linux-kernel - [PATCH AUTOSEL 6.6 032/139] ACPICA: check null return of ACPI_ALLOCATE_ZEROED() in acpi_db_convert_to

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Message-ID: <20240925121137.1307574-32-sashal@kernel.org>
Date: Wed, 25 Sep 2024 08:07:32 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Pei Xiao <xiaopei01@...inos.cn>,
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Sasha Levin <sashal@...nel.org>,
	robert.moore@...el.com,
	linux-acpi@...r.kernel.org,
	acpica-devel@...ts.linux.dev
Subject: [PATCH AUTOSEL 6.6 032/139] ACPICA: check null return of ACPI_ALLOCATE_ZEROED() in acpi_db_convert_to_package()

From: Pei Xiao <xiaopei01@...inos.cn>

[ Upstream commit a5242874488eba2b9062985bf13743c029821330 ]

ACPICA commit 4d4547cf13cca820ff7e0f859ba83e1a610b9fd0

ACPI_ALLOCATE_ZEROED() may fail, elements might be NULL and will cause
NULL pointer dereference later.

Link: https://github.com/acpica/acpica/commit/4d4547cf
Signed-off-by: Pei Xiao <xiaopei01@...inos.cn>
Link: https://patch.msgid.link/tencent_4A21A2865B8B0A0D12CAEBEB84708EDDB505@qq.com
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/acpi/acpica/dbconvert.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/acpi/acpica/dbconvert.c b/drivers/acpi/acpica/dbconvert.c
index 2b84ac093698a..8dbab69320499 100644
--- a/drivers/acpi/acpica/dbconvert.c
+++ b/drivers/acpi/acpica/dbconvert.c
@@ -174,6 +174,8 @@ acpi_status acpi_db_convert_to_package(char *string, union acpi_object *object)
 	elements =
 	    ACPI_ALLOCATE_ZEROED(DB_DEFAULT_PKG_ELEMENTS *
 				 sizeof(union acpi_object));
+	if (!elements)
+		return (AE_NO_MEMORY);
 
 	this = string;
 	for (i = 0; i < (DB_DEFAULT_PKG_ELEMENTS - 1); i++) {
-- 
2.43.0