From 1c8542c7bb239ef02fe21477acd9cdac04c1b640 Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Wed, 8 Apr 2009 15:07:30 +0800 Subject: sysfs: use memdup_user() Remove open-coded memdup_user(). Signed-off-by: Li Zefan Signed-off-by: Al Viro --- fs/sysfs/bin.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) (limited to 'fs/sysfs') diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c index 93e0c0281d45..9345806c8853 100644 --- a/fs/sysfs/bin.c +++ b/fs/sysfs/bin.c @@ -157,14 +157,9 @@ static ssize_t write(struct file *file, const char __user *userbuf, count = size - offs; } - temp = kmalloc(count, GFP_KERNEL); - if (!temp) - return -ENOMEM; - - if (copy_from_user(temp, userbuf, count)) { - count = -EFAULT; - goto out_free; - } + temp = memdup_user(userbuf, count); + if (IS_ERR(temp)) + return PTR_ERR(temp); mutex_lock(&bb->mutex); @@ -176,8 +171,6 @@ static ssize_t write(struct file *file, const char __user *userbuf, if (count > 0) *off = offs + count; -out_free: - kfree(temp); return count; } -- cgit v1.2.2