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authorSteffen Klassert <steffen.klassert@secunet.com>2017-08-25 08:34:35 +0300
committerSteffen Klassert <steffen.klassert@secunet.com>2017-08-25 10:26:24 +0300
commit54ffd790792898f05e215dce5aa593473e80e92f (patch)
tree432d194da894dfa6f0911191987e68885235513a /net/ipv4
parent36ff0dd39f9b88ca83e1733b735e9f22b7be893b (diff)
downloadlinux-54ffd790792898f05e215dce5aa593473e80e92f.tar.xz
esp: Fix skb tailroom calculation
We use skb_availroom to calculate the skb tailroom for the ESP trailer. skb_availroom calculates the tailroom and subtracts this value by reserved_tailroom. However reserved_tailroom is a union with the skb mark. This means that we subtract the tailroom by the skb mark if set. Fix this by using skb_tailroom instead. Fixes: cac2661c53f3 ("esp4: Avoid skb_cow_data whenever possible") Fixes: 03e2a30f6a27 ("esp6: Avoid skb_cow_data whenever possible") Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/esp4.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index a8ddb95e7f06..df68963dc90a 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -258,7 +258,7 @@ int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *
esp_output_udp_encap(x, skb, esp);
if (!skb_cloned(skb)) {
- if (tailen <= skb_availroom(skb)) {
+ if (tailen <= skb_tailroom(skb)) {
nfrags = 1;
trailer = skb;
tail = skb_tail_pointer(trailer);