linux-kernel - [PATCH v11 04/15] platform/x86: dell-wmi: don't check length returned

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-Id: <d9b7d540e14f23520f69179c3f6f7816010c4c87.1508515469.git.mario.limonciello@dell.com>
Date:   Fri, 20 Oct 2017 12:40:19 -0500
From:   Mario Limonciello <mario.limonciello@...l.com>
To:     dvhart@...radead.org, Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        platform-driver-x86@...r.kernel.org,
        Andy Lutomirski <luto@...nel.org>, quasisec@...gle.com,
        pali.rohar@...il.com, rjw@...ysocki.net, mjg59@...gle.com,
        hch@....de, Greg KH <greg@...ah.com>,
        Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        Mario Limonciello <mario.limonciello@...l.com>
Subject: [PATCH v11 04/15] platform/x86: dell-wmi: don't check length returned

This is intended to be variable and provided by the platform.
Some platforms this year will be adopting a 32k WMI buffer, so don't
complain when encountering those platforms or any other future changes.

Signed-off-by: Mario Limonciello <mario.limonciello@...l.com>
Reviewed-by: Edward O'Callaghan <quasisec@...gle.com>
Reviewed-by: Pali Rohár <pali.rohar@...il.com>
---
 drivers/platform/x86/dell-wmi.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
index b2bd396acac5..da4f629d0831 100644
--- a/drivers/platform/x86/dell-wmi.c
+++ b/drivers/platform/x86/dell-wmi.c
@@ -624,7 +624,7 @@ static void dell_wmi_input_destroy(struct wmi_device *wdev)
  * Vendor Signature          0       4    "DELL"
  * Object Signature          4       4    " WMI"
  * WMI Interface Version     8       4    <version>
- * WMI buffer length        12       4    4096
+ * WMI buffer length        12       4    <length>
  */
 static int dell_wmi_check_descriptor_buffer(struct wmi_device *wdev)
 {
@@ -674,10 +674,6 @@ static int dell_wmi_check_descriptor_buffer(struct wmi_device *wdev)
 		dev_warn(&wdev->dev, "Dell descriptor buffer has unknown version (%lu)\n",
 			(unsigned long) buffer[2]);
 
-	if (buffer[3] != 4096)
-		dev_warn(&wdev->dev, "Dell descriptor buffer has invalid buffer length (%d)\n",
-			buffer[3]);
-
 	priv->interface_version = buffer[2];
 	ret = 0;
 
-- 
2.14.1