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Tad 2017-11-07 17:32:46 -05:00
parent 57ce42402b
commit 11c7037780
1215 changed files with 60697 additions and 14533 deletions
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91
Patches/Linux_CVEs/CVE-2017-0524/ANY/0003.patch Normal file
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@ -0,0 +1,91 @@
From e6430a4da1fb0212a546379eadbe986f629c3ae9 Mon Sep 17 00:00:00 2001
From: Andrew Chant <achant@google.com>
Date: Fri, 13 Jan 2017 11:41:03 -0800
Subject: [PATCH] input: synaptics_dsx: protect tmpbuf allocation.
Protect tmpbuf from concurrent access by mutex.
BUG: 33555878
BUG: 33002026
Change-Id: Ia7eeb59ca7b626f416e2298b4b9ffd960fe909e4
Signed-off-by: Andrew Chant <achant@google.com>
---
.../synaptics_dsx_htc_2.6/synaptics_dsx_rmi_dev.c | 36 ++++++++++++++--------
1 file changed, 24 insertions(+), 12 deletions(-)
diff --git a/drivers/input/touchscreen/synaptics_dsx_htc_2.6/synaptics_dsx_rmi_dev.c b/drivers/input/touchscreen/synaptics_dsx_htc_2.6/synaptics_dsx_rmi_dev.c
index e699dfea50c81..6878b71da9be0 100644
--- a/drivers/input/touchscreen/synaptics_dsx_htc_2.6/synaptics_dsx_rmi_dev.c
+++ b/drivers/input/touchscreen/synaptics_dsx_htc_2.6/synaptics_dsx_rmi_dev.c
@@ -565,18 +565,24 @@ static ssize_t rmidev_read(struct file *filp, char __user *buf,
return -EBADF;
}
- if (count == 0)
- return 0;
+ mutex_lock(&(dev_data->file_mutex));
+
+ if (*f_pos > REG_ADDR_LIMIT) {
+ retval = -EFAULT;
+ goto clean_up;
+ }
if (count > (REG_ADDR_LIMIT - *f_pos))
count = REG_ADDR_LIMIT - *f_pos;
+ if (count == 0) {
+ retval = 0;
+ goto clean_up;
+ }
address = (unsigned short)(*f_pos);
rmidev_allocate_buffer(count);
- mutex_lock(&(dev_data->file_mutex));
-
retval = synaptics_rmi4_reg_read(rmidev->rmi4_data,
*f_pos,
rmidev->tmpbuf,
@@ -636,19 +642,25 @@ static ssize_t rmidev_write(struct file *filp, const char __user *buf,
return -EBADF;
}
- if (count == 0)
- return 0;
+ mutex_lock(&(dev_data->file_mutex));
+ if (*f_pos > REG_ADDR_LIMIT) {
+ retval = -EFAULT;
+ goto unlock;
+ }
if (count > (REG_ADDR_LIMIT - *f_pos))
count = REG_ADDR_LIMIT - *f_pos;
+ if (count == 0) {
+ retval = 0;
+ goto unlock;
+ }
rmidev_allocate_buffer(count);
- if (copy_from_user(rmidev->tmpbuf, buf, count))
- return -EFAULT;
-
- mutex_lock(&(dev_data->file_mutex));
-
+ if (copy_from_user(rmidev->tmpbuf, buf, count)) {
+ retval = -EFAULT;
+ goto unlock;
+ }
retval = synaptics_rmi4_reg_write(rmidev->rmi4_data,
*f_pos,
rmidev->tmpbuf,
@@ -656,8 +668,8 @@ static ssize_t rmidev_write(struct file *filp, const char __user *buf,
if (retval >= 0)
*f_pos += retval;
+unlock:
mutex_unlock(&(dev_data->file_mutex));
-
return retval;
}