This reverts commit
127500d724f8c43f452610c9080444eedb5eaa6c. That fixed
the problem of buffer over-reads introduced by backporting commit
89c22d8c3b27 ("net: Fix skb csum races when peeking"), but resulted in
incorrect checksumming for short reads. It will be replaced with a
complete fix.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
int size);
extern int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb,
int hlen,
- struct iovec *iov,
- int len);
+ struct iovec *iov);
extern int skb_copy_datagram_from_iovec(struct sk_buff *skb,
int offset,
const struct iovec *from,
* @skb: skbuff
* @hlen: hardware length
* @iov: io vector
- * @len: amount of data to copy from skb to iov
*
* Caller _must_ check that skb will fit to this iovec.
*
* can be modified!
*/
int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb,
- int hlen, struct iovec *iov, int len)
+ int hlen, struct iovec *iov)
{
__wsum csum;
int chunk = skb->len - hlen;
- if (chunk > len)
- chunk = len;
-
if (!chunk)
return 0;
err = skb_copy_datagram_iovec(skb, hlen, tp->ucopy.iov, chunk);
else
err = skb_copy_and_csum_datagram_iovec(skb, hlen,
- tp->ucopy.iov, chunk);
+ tp->ucopy.iov);
if (!err) {
tp->ucopy.len -= chunk;
else {
err = skb_copy_and_csum_datagram_iovec(skb,
sizeof(struct udphdr),
- msg->msg_iov, copied);
+ msg->msg_iov);
if (err == -EINVAL)
goto csum_copy_err;
goto csum_copy_err;
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
} else {
- err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov, copied);
+ err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
if (err == -EINVAL)
goto csum_copy_err;
}
err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
msg->msg_iov, copied );
else {
- err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr),
- msg->msg_iov, copied);
+ err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
if (err == -EINVAL)
goto csum_copy_err;
}
msg->msg_iov, copy);
} else {
ret = skb_copy_and_csum_datagram_iovec(skb, offset,
- msg->msg_iov,
- copy);
+ msg->msg_iov);
if (ret == -EINVAL)
goto csum_copy_error;
}