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| author | Steffen Klassert <steffen.klassert@secunet.com> | 2017-08-25 07:34:35 +0200 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2017-08-25 09:26:24 +0200 |
| commit | 54ffd790792898f05e215dce5aa593473e80e92f (patch) | |
| tree | 432d194da894dfa6f0911191987e68885235513a /net/ipv4/esp4.c | |
| parent | 36ff0dd39f9b88ca83e1733b735e9f22b7be893b (diff) | |
| download | linux-54ffd790792898f05e215dce5aa593473e80e92f.tar.gz linux-54ffd790792898f05e215dce5aa593473e80e92f.tar.bz2 linux-54ffd790792898f05e215dce5aa593473e80e92f.zip | |
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/esp4.c')
| -rw-r--r-- | net/ipv4/esp4.c | 2 |
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); |