linux-kernel - [PATCH v8 04/15] platform/x86: dell-wmi: allow 32k return size in the descriptor

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: <5064c5e052e624dba7ac50921d9fc7d767bb6cbe.1507958847.git.mario.limonciello@dell.com>
Date:   Sat, 14 Oct 2017 00:32:42 -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 v8 04/15] platform/x86: dell-wmi: allow 32k return size in the descriptor

Some platforms this year will be adopting 32k WMI buffer, so don't
complain when encountering those.

Signed-off-by: Mario Limonciello <mario.limonciello@...l.com>
---
 drivers/platform/x86/dell-wmi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
index ece2fe341f01..2578dff90a14 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    4096 or 32768
  */
 static int dell_wmi_check_descriptor_buffer(struct wmi_device *wdev)
 {
@@ -674,7 +674,7 @@ static int dell_wmi_check_descriptor_buffer(struct wmi_device *wdev)
 		dev_warn(&wdev->dev, "Dell descriptor buffer has unknown version (%u)\n",
 			buffer[2]);
 
-	if (buffer[3] != 4096)
+	if (buffer[3] != 4096 && buffer[3] != 32768)
 		dev_warn(&wdev->dev, "Dell descriptor buffer has invalid buffer length (%u)\n",
 			buffer[3]);
 
-- 
2.14.1