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Date:   Fri, 22 Mar 2019 12:15:49 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dexuan Cui <decui@...rosoft.com>,
        Dan Williams <dan.j.williams@...el.com>
Subject: [PATCH 4.9 077/118] nfit: acpi_nfit_ctl(): Check out_obj->type in the right place

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

------------------

From: Dexuan Cui <decui@...rosoft.com>

commit 43f89877f26671c6309cd87d7364b1a3e66e71cf upstream.

In the case of ND_CMD_CALL, we should also check out_obj->type.

The patch uses out_obj->type, which is a short alias to
out_obj->package.type.

Fixes: 31eca76ba2fc ("nfit, libnvdimm: limited/whitelisted dimm command marshaling mechanism")
Cc: <stable@...r.kernel.org>
Signed-off-by: Dexuan Cui <decui@...rosoft.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>


---
 drivers/acpi/nfit/core.c |   14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -307,6 +307,13 @@ int acpi_nfit_ctl(struct nvdimm_bus_desc
 		return -EINVAL;
 	}
 
+	if (out_obj->type != ACPI_TYPE_BUFFER) {
+		dev_dbg(dev, "%s unexpected output object type cmd: %s type: %d\n",
+				dimm_name, cmd_name, out_obj->type);
+		rc = -EINVAL;
+		goto out;
+	}
+
 	if (call_pkg) {
 		call_pkg->nd_fw_size = out_obj->buffer.length;
 		memcpy(call_pkg->nd_payload + call_pkg->nd_size_in,
@@ -325,13 +332,6 @@ int acpi_nfit_ctl(struct nvdimm_bus_desc
 		return 0;
 	}
 
-	if (out_obj->package.type != ACPI_TYPE_BUFFER) {
-		dev_dbg(dev, "%s:%s unexpected output object type cmd: %s type: %d\n",
-				__func__, dimm_name, cmd_name, out_obj->type);
-		rc = -EINVAL;
-		goto out;
-	}
-
 	if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG)) {
 		dev_dbg(dev, "%s:%s cmd: %s output length: %d\n", __func__,
 				dimm_name, cmd_name, out_obj->buffer.length);


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