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authorAl Viro <viro@zeniv.linux.org.uk>2015-12-24 08:06:05 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2016-01-04 18:26:58 +0300
commit16e5c1fc36040e592128a164499bc25eb138a80f (patch)
treea080bd2eea306d5815c5a9eefb46180e2bedffb2 /drivers/s390/char/vmcp.c
parent7e935c7ca1e6c398f11edac5beabfc4348e3b3a4 (diff)
downloadlinux-16e5c1fc36040e592128a164499bc25eb138a80f.tar.xz
convert a bunch of open-coded instances of memdup_user_nul()
A _lot_ of ->write() instances were open-coding it; some are converted to memdup_user_nul(), a lot more remain... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers/s390/char/vmcp.c')
-rw-r--r--drivers/s390/char/vmcp.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c
index 0fdedadff7bc..2a67b496a9e2 100644
--- a/drivers/s390/char/vmcp.c
+++ b/drivers/s390/char/vmcp.c
@@ -88,14 +88,9 @@ vmcp_write(struct file *file, const char __user *buff, size_t count,
if (count > 240)
return -EINVAL;
- cmd = kmalloc(count + 1, GFP_KERNEL);
- if (!cmd)
- return -ENOMEM;
- if (copy_from_user(cmd, buff, count)) {
- kfree(cmd);
- return -EFAULT;
- }
- cmd[count] = '\0';
+ cmd = memdup_user_nul(buff, count);
+ if (IS_ERR(cmd))
+ return PTR_ERR(cmd);
session = file->private_data;
if (mutex_lock_interruptible(&session->mutex)) {
kfree(cmd);