3.16.7-ckt23 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------
From: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
This reverts commit fa89ae5548ed282f0ceb4660b3b93e4e2ee875f3.
As reported by Michal Kubecek, the backport of commit 89c22d8c3b27
("net: Fix skb csum races when peeking") exposed an upstream bug.
It is being reverted and replaced by a better fix.
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
include/linux/skbuff.h | 2 +-
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 +--
6 files changed, 6 insertions(+), 11 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 94038f93f145..010bc80be91c 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2525,7 +2525,7 @@ unsigned int datagram_poll(struct file *file, struct socket *sock,
int skb_copy_datagram_iovec(const struct sk_buff *from, int offset,
struct iovec *to, int size);
int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb, int hlen,
- struct iovec *iov, int len);
+ struct iovec *iov);
int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset,
const struct iovec *from, int from_offset,
int len);
diff --git a/net/core/datagram.c b/net/core/datagram.c
index 169f742d1464..3c69a464595e 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -818,7 +818,6 @@ 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.
*
@@ -828,14 +827,11 @@ 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 43404d3f9da8..036615125532 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4903,7 +4903,7 @@ 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 4b9e4aba11b0..10c1530ba978 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1307,7 +1307,7 @@ 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 a652fdb6bd5d..1463757e8682 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -492,7 +492,7 @@ 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 eb38829d8919..f94b850511e3 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -428,8 +428,7 @@ 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;
}
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html