From: Jiri Kosina <jkosina@suse.cz>
Date: Wed, 17 Sep 2008 17:41:58 +0000 (+0200)
Subject: HID: fix incorrent length condition in hidraw_write()
X-Git-Tag: firefly_0821_release~17679^2~16
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2b107d629dc0c35de606bb7b010b829cd247a93a;p=firefly-linux-kernel-4.4.55.git

HID: fix incorrent length condition in hidraw_write()

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>
---

diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index 4be240e74d4f..497e0d1dd3c3 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;