From: Jiri Kosina <jkosina@suse.cz>
Date: Tue, 11 Nov 2008 22:45:38 +0000 (+0100)
Subject: HID: fix incorrent length condition in hidraw_write()
X-Git-Tag: v2.6.27.6~1
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=91d0da3c88d130c03a16813aeee7dbedc539b017;p=karo-tx-linux.git

HID: fix incorrent length condition in hidraw_write()

upstream commit 2b107d629dc0c35de606bb7b010b829cd247a93a

From: Jiri Kosina <jkosina@suse.cz>

The bound check on the buffer length

	if (count > HID_MIN_BUFFER_SIZE)

is of course incorrent, the proper check is

	if (count > HID_MAX_BUFFER_SIZE)

Fix it.

Reported-by: Jerry Ryle <jerry@mindtribe.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: Paul Stoffregen <paul@pjrc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index c40f0403edaf..8c030d9dd0dd 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -113,7 +113,7 @@ static ssize_t hidraw_write(struct file *file, const char __user *buffer, size_t
 	if (!dev->hid_output_raw_report)
 		return -ENODEV;
 
-	if (count > HID_MIN_BUFFER_SIZE) {
+	if (count > HID_MAX_BUFFER_SIZE) {
 		printk(KERN_WARNING "hidraw: pid %d passed too large report\n",
 				task_pid_nr(current));
 		return -EINVAL;