From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Tissoires Subject: [PATCH 02/14] HID: i2c-hid: fix memory corruption due to missing hid declaration Date: Tue, 4 Dec 2012 16:27:43 +0100 Message-ID: <1354634875-5182-3-git-send-email-benjamin.tissoires@gmail.com> References: <1354634875-5182-1-git-send-email-benjamin.tissoires@gmail.com> Return-path: In-Reply-To: <1354634875-5182-1-git-send-email-benjamin.tissoires@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Benjamin Tissoires , Jiri Kosina , Jean Delvare , linux-input@vger.kernel.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-i2c@vger.kernel.org HID descriptors contains 4 bytes of reserved field. The previous implementation was overriding the next fields in struct i2c_hid. Signed-off-by: Benjamin Tissoires --- drivers/hid/i2c-hid/i2c-hid.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c index 0fbb229..ad771a7 100644 --- a/drivers/hid/i2c-hid/i2c-hid.c +++ b/drivers/hid/i2c-hid/i2c-hid.c @@ -68,6 +68,7 @@ struct i2c_hid_desc { __le16 wVendorID; __le16 wProductID; __le16 wVersionID; + __le32 reserved; } __packed; struct i2c_hid_cmd { @@ -778,7 +779,7 @@ static int __devinit i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid) } dsize = le16_to_cpu(hdesc->wHIDDescLength); - if (!dsize || dsize > HID_MAX_DESCRIPTOR_SIZE) { + if (!dsize || dsize > sizeof(struct i2c_hid_desc)) { dev_err(&client->dev, "weird size of HID descriptor (%u)\n", dsize); return -ENODEV; -- 1.8.0.1