net: Fix wrong interpretation of some copy_to_user() results.

[pandora-kernel.git] / net / can / raw.c

diff --git a/net/can/raw.c b/net/can/raw.c
index ead50c7..201cbfc 100644 (file)
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -573,7 +573,8 @@ static int raw_getsockopt(struct socket *sock, int level, int optname,
                        int fsize = ro->count * sizeof(struct can_filter);
                        if (len > fsize)
                                len = fsize;
-                       err = copy_to_user(optval, ro->filter, len);
+                       if (copy_to_user(optval, ro->filter, len))
+                               err = -EFAULT;
                } else
                        len = 0;
                release_sock(sk);