Commit fbf405e8 authored by David S. Miller's avatar David S. Miller

Merge branch 'udp-hdrs-fixes'

Willem de Bruijn says:

fix two more udp pull header issues

Follow up patches to the fixes to RxRPC and SunRPC. A scan of the
code showed two other interfaces that expect UDP packets to have
a udphdr when queued: read packet length with ioctl SIOCINQ and
receive payload checksum with socket option IP_CHECKSUM.
Signed-off-by: default avatarDavid S. Miller <>
parents 99717bdf 31c2e492
......@@ -106,7 +106,8 @@ static void ip_cmsg_recv_checksum(struct msghdr *msg, struct sk_buff *skb,
if (offset != 0)
csum = csum_sub(csum, csum_partial(skb->data, offset, 0));
csum = csum_sub(csum, csum_partial(skb_transport_header(skb),
offset, 0));
put_cmsg(msg, SOL_IP, IP_CHECKSUM, sizeof(__wsum), &csum);
......@@ -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);
......@@ -1377,7 +1375,7 @@ try_again:
*addr_len = sizeof(*sin);
if (inet->cmsg_flags)
ip_cmsg_recv_offset(msg, skb, sizeof(struct udphdr));
ip_cmsg_recv_offset(msg, skb, sizeof(struct udphdr) + off);
err = copied;
if (flags & MSG_TRUNC)
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