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([106.39.42.164]) by smtp.gmail.com with ESMTPSA id u4-20020a632344000000b005dc3fc53f19sm10403737pgm.7.2024.04.02.18.43.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Apr 2024 18:43:34 -0700 (PDT) From: Huai-Yuan Liu To: robert.moore@intel.com, rafael.j.wysocki@intel.com, lenb@kernel.org Cc: linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, linux-kernel@vger.kernel.org, baijiaju1990@outlook.com, Huai-Yuan Liu Subject: [PATCH] ACPICA: debugger: dbconvert: add a null pointer check Date: Wed, 3 Apr 2024 09:43:26 +0800 Message-Id: <20240403014326.970237-1-qq810974084@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The memory allocation function ACPI_ALLOCATE_ZEROED does not guarantee a successful allocation, but the subsequent code directly dereferences the pointer that receives it, which may lead to null pointer dereference. To fix this issue, a null pointer check should be added. If it is null, return exception code AE_NO_MEMORY. Fixes: 995751025572 ("ACPICA: Linuxize: Export debugger files to Linux") Signed-off-by: Huai-Yuan Liu --- 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 2b84ac093698..8dbab6932049 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++) {