From: Hendrik Brueckner <brueckner@xxxxxxxxxxxxxxxxxx> If the skb cannot be copied to user iovec, always return -EFAULT. The skb is enqueued again, except MSG_PEEK flag is set, to allow user space applications to correct its iovec pointer. Signed-off-by: Hendrik Brueckner <brueckner@xxxxxxxxxxxxxxxxxx> Signed-off-by: Ursula Braun <ursula.braun@xxxxxxxxxx> --- net/iucv/af_iucv.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) Index: net-next-2.6-uschi/net/iucv/af_iucv.c =================================================================== --- net-next-2.6-uschi.orig/net/iucv/af_iucv.c +++ net-next-2.6-uschi/net/iucv/af_iucv.c @@ -965,7 +965,6 @@ static int iucv_sock_recvmsg(struct kioc int noblock = flags & MSG_DONTWAIT; struct sock *sk = sock->sk; struct iucv_sock *iucv = iucv_sk(sk); - int target; unsigned int copied, rlen; struct sk_buff *skb, *rskb, *cskb; int err = 0; @@ -979,8 +978,6 @@ static int iucv_sock_recvmsg(struct kioc if (flags & (MSG_OOB)) return -EOPNOTSUPP; - target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); - skb = skb_recv_datagram(sk, flags, noblock, &err); if (!skb) { if (sk->sk_shutdown & RCV_SHUTDOWN) @@ -993,10 +990,9 @@ static int iucv_sock_recvmsg(struct kioc cskb = skb; if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) { - skb_queue_head(&sk->sk_receive_queue, skb); - if (copied == 0) - return -EFAULT; - goto done; + if (!(flags & MSG_PEEK)) + skb_queue_head(&sk->sk_receive_queue, skb); + return -EFAULT; } /* SOCK_SEQPACKET: set MSG_TRUNC if recv buf size is too small */ -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html