Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[firefly-linux-kernel-4.4.55.git] / fs / binfmt_misc.c

diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index c96b855d2a5e8f7c98fad508fc05ee3f0a20c92b..fd8beb9657a2c66f406d3eacadae5ca95e65d805 100644 (file)
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -411,12 +411,12 @@ static int parse_command(const char __user *buffer, size_t count)
 {
        char s[4];
 
-       if (!count)
-               return 0;
        if (count > 3)
                return -EINVAL;
        if (copy_from_user(s, buffer, count))
                return -EFAULT;
+       if (!count)
+               return 0;
        if (s[count-1] == '\n')
                count--;
        if (count == 1 && s[0] == '0')