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authorAl Viro <viro@zeniv.linux.org.uk>2015-12-24 00:06:05 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2016-01-04 10:26:58 -0500
commit16e5c1fc36040e592128a164499bc25eb138a80f (patch)
treea080bd2eea306d5815c5a9eefb46180e2bedffb2 /drivers/sbus
parent7e935c7ca1e6c398f11edac5beabfc4348e3b3a4 (diff)
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/sbus')
-rw-r--r--drivers/sbus/char/openprom.c13
1 files changed, 3 insertions, 10 deletions
diff --git a/drivers/sbus/char/openprom.c b/drivers/sbus/char/openprom.c
index 5843288f64bc..e077ebd89319 100644
--- a/drivers/sbus/char/openprom.c
+++ b/drivers/sbus/char/openprom.c
@@ -390,16 +390,9 @@ static int copyin_string(char __user *user, size_t len, char **ptr)
if ((ssize_t)len < 0 || (ssize_t)(len + 1) < 0)
return -EINVAL;
- tmp = kmalloc(len + 1, GFP_KERNEL);
- if (!tmp)
- return -ENOMEM;
-
- if (copy_from_user(tmp, user, len)) {
- kfree(tmp);
- return -EFAULT;
- }
-
- tmp[len] = '\0';
+ tmp = memdup_user_nul(user, len);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
*ptr = tmp;

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