2.6.32-longterm review patch. If anyone has any objections, please let me know.
------------------
From: Willy Tarreau <w@xxxxxx>
This reverts commit c507639ba963bb47e3f515670a7cace76af76ab6.
As reported by Michal Kubecek, this fix doesn't handle truncated
reads correctly. Next patch from Eric fixes it better.
Signed-off-by: Willy Tarreau <w@xxxxxx>
---
include/linux/skbuff.h | 3 +--
net/core/datagram.c | 6 +-----
net/ipv4/tcp_input.c | 2 +-
net/ipv4/udp.c | 2 +-
net/ipv6/raw.c | 2 +-
net/ipv6/udp.c | 3 +--
net/rxrpc/ar-recvmsg.c | 3 +--
7 files changed, 7 insertions(+), 14 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index c282a2c..ae77862 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1765,8 +1765,7 @@ extern int skb_copy_datagram_iovec(const struct sk_buff *from,
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,
diff --git a/net/core/datagram.c b/net/core/datagram.c
index 767c17a..253d068 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -693,7 +693,6 @@ EXPORT_SYMBOL(__skb_checksum_complete);
* @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.
*
@@ -703,14 +702,11 @@ EXPORT_SYMBOL(__skb_checksum_complete);
* 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;
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index d3dcfb9..c821218 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4985,7 +4985,7 @@ static int tcp_copy_to_iovec(struct sock *sk, struct sk_buff *skb, int hlen)
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;
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 83b507d..3ae286b 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -975,7 +975,7 @@ try_again:
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;
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index f016542..d5b09c7 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -476,7 +476,7 @@ static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
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;
}
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 5c8bd19..0b023f3 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -233,8 +233,7 @@ try_again:
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;
}
diff --git a/net/rxrpc/ar-recvmsg.c b/net/rxrpc/ar-recvmsg.c
index 813e1c4..b6076b2 100644
--- a/net/rxrpc/ar-recvmsg.c
+++ b/net/rxrpc/ar-recvmsg.c
@@ -184,8 +184,7 @@ int rxrpc_recvmsg(struct kiocb *iocb, struct socket *sock,
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;
}
--
1.7.12.2.21.g234cd45.dirty
--
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