udp: do not expect udp headers on ioctl SIOCINQ

On udp sockets, ioctl SIOCINQ returns the payload size of the first
packet. Since commit e6afc8ace6dd pulled the headers, the result is
incorrect when subtracting header length. Remove that operation.

Fixes: e6afc8ace6dd ("udp: remove headers from UDP packets before queueing")

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 3563788d064fb2dd1a34398ae1dd90766d7f4f1d..d2d294b0a1f1587c4290379d3c78ba9a4a8e281c 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1282,8 +1282,6 @@ int udp_ioctl(struct sock *sk, int cmd, unsigned long arg)
                         * of this packet since that is all
                         * that will be read.
                         */
-                       amount -= sizeof(struct udphdr);
-
                return put_user(amount, (int __user *)arg);
        }