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-rw-r--r--fs/cachefiles/daemon.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/fs/cachefiles/daemon.c b/fs/cachefiles/daemon.c
index f601def05bdf..452e98dd7560 100644
--- a/fs/cachefiles/daemon.c
+++ b/fs/cachefiles/daemon.c
@@ -226,15 +226,9 @@ static ssize_t cachefiles_daemon_write(struct file *file,
return -EOPNOTSUPP;
/* drag the command string into the kernel so we can parse it */
- data = kmalloc(datalen + 1, GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- ret = -EFAULT;
- if (copy_from_user(data, _data, datalen) != 0)
- goto error;
-
- data[datalen] = '\0';
+ data = memdup_user_nul(_data, datalen);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
ret = -EINVAL;
if (memchr(data, '\0', datalen))