can: avoids a false warning

At this point optlen == sizeof(sfilter) but some compilers are dumb.

Reported-by: Németh Márton <[email protected]
Signed-off-by: Eric Dumazet <[email protected]>
Acked-by: Oliver Hartkopp <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/net/can/raw.c b/net/can/raw.c
index 3a7dffb6519ce9083b876b64f823cffcb1020c3d..da99cf153b33737ce45a06e71fc89037b96096b3 100644 (file)
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -445,7 +445,7 @@ static int raw_setsockopt(struct socket *sock, int level, int optname,
                                return -EFAULT;
                        }
                } else if (count == 1) {
-                       if (copy_from_user(&sfilter, optval, optlen))
+                       if (copy_from_user(&sfilter, optval, sizeof(sfilter)))
                                return -EFAULT;
                }