This is a note to let you know that I've just added the patch titled
ipv6: check raw payload size correctly in ioctl
to the 4.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ipv6-check-raw-payload-size-correctly-in-ioctl.patch
and it can be found in the queue-4.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Sat Apr 29 08:22:40 CEST 2017
From: Jamie Bainbridge <jbainbri@xxxxxxxxxx>
Date: Wed, 26 Apr 2017 10:43:27 +1000
Subject: ipv6: check raw payload size correctly in ioctl
From: Jamie Bainbridge <jbainbri@xxxxxxxxxx>
[ Upstream commit 105f5528b9bbaa08b526d3405a5bcd2ff0c953c8 ]
In situations where an skb is paged, the transport header pointer and
tail pointer can be the same because the skb contents are in frags.
This results in ioctl(SIOCINQ/FIONREAD) incorrectly returning a
length of 0 when the length to receive is actually greater than zero.
skb->len is already correctly set in ip6_input_finish() with
pskb_pull(), so use skb->len as it always returns the correct result
for both linear and paged data.
Signed-off-by: Jamie Bainbridge <jbainbri@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/raw.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -1174,8 +1174,7 @@ static int rawv6_ioctl(struct sock *sk,
spin_lock_bh(&sk->sk_receive_queue.lock);
skb = skb_peek(&sk->sk_receive_queue);
if (skb)
- amount = skb_tail_pointer(skb) -
- skb_transport_header(skb);
+ amount = skb->len;
spin_unlock_bh(&sk->sk_receive_queue.lock);
return put_user(amount, (int __user *)arg);
}
Patches currently in stable-queue which might be from jbainbri@xxxxxxxxxx are
queue-4.10/ipv6-check-raw-payload-size-correctly-in-ioctl.patch