[PATCH 5.2 016/137] udp: fix gso_segs calculations

[Greg Kroah-Hartman]

From: Josh Hunt <joh...@akamai.com>

[ Upstream commit 44b321e5020d782ad6e8ae8183f09b163be6e6e2 ]

Commit dfec0ee22c0a ("udp: Record gso_segs when supporting UDP segmentation 
offload")
added gso_segs calculation, but incorrectly got sizeof() the pointer and
not the underlying data type. In addition let's fix the v6 case.

Fixes: bec1f6f69736 ("udp: generate gso with UDP_SEGMENT")
Fixes: dfec0ee22c0a ("udp: Record gso_segs when supporting UDP segmentation 
offload")
Signed-off-by: Josh Hunt <joh...@akamai.com>
Reviewed-by: Alexander Duyck <alexander.h.du...@linux.intel.com>
Acked-by: Willem de Bruijn <will...@google.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 net/ipv4/udp.c |    2 +-
 net/ipv6/udp.c |    2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -868,7 +868,7 @@ static int udp_send_skb(struct sk_buff *
 
                skb_shinfo(skb)->gso_size = cork->gso_size;
                skb_shinfo(skb)->gso_type = SKB_GSO_UDP_L4;
-               skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(len - sizeof(uh),
+               skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(len - sizeof(*uh),
                                                         cork->gso_size);
                goto csum_partial;
        }
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1156,6 +1156,8 @@ static int udp_v6_send_skb(struct sk_buf
 
                skb_shinfo(skb)->gso_size = cork->gso_size;
                skb_shinfo(skb)->gso_type = SKB_GSO_UDP_L4;
+               skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(len - sizeof(*uh),
+                                                        cork->gso_size);
                goto csum_partial;
        }