mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-24 15:09:34 -05:00
52 lines
1.7 KiB
Diff
52 lines
1.7 KiB
Diff
From 3c0add95808fdada98ba0ab465c0b4ba49e71d26 Mon Sep 17 00:00:00 2001
|
|
From: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
|
|
Date: Thu, 5 May 2016 14:37:08 +0530
|
|
Subject: USB: dwc3: debugfs: Add boundary check in dwc3_store_ep_num()
|
|
|
|
User can pass arguments as part of write to requests and endpoint number
|
|
will be calculated based on the arguments. There is a chance that driver
|
|
can access ep structue that is not allocated due to invalid arguments
|
|
passed by user. Hence fix the issue by having check and return error in
|
|
case of invalid arguments.
|
|
|
|
Change-Id: I060ea878b55ce0f9983b91c50e58718c8a2c2fa1
|
|
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
|
|
---
|
|
drivers/usb/dwc3/debugfs.c | 12 ++++++++++--
|
|
1 file changed, 10 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
|
|
index 857b413..fc3f959 100644
|
|
--- a/drivers/usb/dwc3/debugfs.c
|
|
+++ b/drivers/usb/dwc3/debugfs.c
|
|
@@ -650,7 +650,7 @@ static ssize_t dwc3_store_ep_num(struct file *file, const char __user *ubuf,
|
|
struct seq_file *s = file->private_data;
|
|
struct dwc3 *dwc = s->private;
|
|
char kbuf[10];
|
|
- unsigned int num, dir;
|
|
+ unsigned int num, dir, temp;
|
|
unsigned long flags;
|
|
|
|
memset(kbuf, 0, 10);
|
|
@@ -661,8 +661,16 @@ static ssize_t dwc3_store_ep_num(struct file *file, const char __user *ubuf,
|
|
if (sscanf(kbuf, "%u %u", &num, &dir) != 2)
|
|
return -EINVAL;
|
|
|
|
+ if (dir != 0 && dir != 1)
|
|
+ return -EINVAL;
|
|
+
|
|
+ temp = (num << 1) + dir;
|
|
+ if (temp >= (dwc->num_in_eps + dwc->num_out_eps) ||
|
|
+ temp >= DWC3_ENDPOINTS_NUM)
|
|
+ return -EINVAL;
|
|
+
|
|
spin_lock_irqsave(&dwc->lock, flags);
|
|
- ep_num = (num << 1) + dir;
|
|
+ ep_num = temp;
|
|
spin_unlock_irqrestore(&dwc->lock, flags);
|
|
|
|
return count;
|
|
--
|
|
cgit v1.1
|
|
|