Al Viro wrote:
>
> Another thing (and if that works, it's *NOT* a proper fix - it would be
> papering over the problem, but at least it would show where to look for
> it) - try (on top of mainline) the following delta:
I tried it on top of v4.6.4 and on top of the very recent v4.7-2509-g59ebc44
from Linus, and still got corruption.
>
> diff --git a/net/core/datagram.c b/net/core/datagram.c
> index b7de71f..0ee5995 100644
> --- a/net/core/datagram.c
> +++ b/net/core/datagram.c
> @@ -734,7 +734,7 @@ int skb_copy_and_csum_datagram_msg(struct sk_buff *skb,
> if (!chunk)
> return 0;
>
> - if (msg_data_left(msg) < chunk) {
> + if (iov_iter_single_seg_count(&msg->msg_iter) < chunk) {
> if (__skb_checksum_complete(skb))
> goto csum_error;
> if (skb_copy_datagram_msg(skb, hlen, msg, chunk))
>
--
Alan Curry
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