lkml.org 
[lkml]   [2011]   [Jan]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] staging: cs5535_gpio: check put_user() return code
Date
put_user() may fail, if so return -EFAULT.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
---
Compile tested only.

drivers/staging/cs5535_gpio/cs5535_gpio.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/cs5535_gpio/cs5535_gpio.c b/drivers/staging/cs5535_gpio/cs5535_gpio.c
index 0cf1e5f..b25f9d1 100644
--- a/drivers/staging/cs5535_gpio/cs5535_gpio.c
+++ b/drivers/staging/cs5535_gpio/cs5535_gpio.c
@@ -146,7 +146,8 @@ static ssize_t cs5535_gpio_read(struct file *file, char __user *buf,

/* add a line-feed if there is room */
if ((i == ARRAY_SIZE(rm)) && (count < len)) {
- put_user('\n', buf + count);
+ if (put_user('\n', buf + count))
+ return -EFAULT;
count++;
}

--
1.7.0.4


\
 
 \ /
  Last update: 2011-01-17 11:11    [W:0.037 / U:0.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site