alloclen = 1480Does this solve the problem (whitespace damaged on paste, but it is just
alloc_extra = 136
datalen = 64095
fragheaderlen = 1480
fraglen = 65575
transhdrlen = 0
mtu = 1480
a code move and removing fraglen getting set twice):
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index e69fac576970..59f036241f1b 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1589,6 +1589,15 @@ static int __ip6_append_data(struct sock *sk,
if (datalen > (cork->length <= mtu &&
!(cork->flags & IPCORK_ALLFRAG) ? mtu : maxfraglen) - fragheaderlen)
datalen = maxfraglen - fragheaderlen -
rt->dst.trailer_len;
+
+ if (datalen != length + fraggap) {
+ /*
+ * this is not the last fragment, the
trailer
+ * space is regarded as data space.
+ */
+ datalen += rt->dst.trailer_len;
+ }
+
fraglen = datalen + fragheaderlen;
pagedlen = 0;
@@ -1615,16 +1624,6 @@ static int __ip6_append_data(struct sock *sk,
}
alloclen += alloc_extra;
- if (datalen != length + fraggap) {
- /*
- * this is not the last fragment, the
trailer
- * space is regarded as data space.
- */
- datalen += rt->dst.trailer_len;
- }
-
- fraglen = datalen + fragheaderlen;
-
copy = datalen - transhdrlen - fraggap - pagedlen;
if (copy < 0) {
err = -EINVAL;