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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2012-02-23 10:55:02 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-02-23 16:50:45 -0500 |
| commit | 03606895cd98c0a628b17324fd7b5ff15db7e3cd (patch) | |
| tree | 26aab95243f23a5d0cff45ee0d6afd1608afe5df /net/ipv4/xfrm4_mode_beet.c | |
| parent | 4a2258ddddefeef3291c0fc66437c73d84261a1e (diff) | |
| download | linux-03606895cd98c0a628b17324fd7b5ff15db7e3cd.tar.gz linux-03606895cd98c0a628b17324fd7b5ff15db7e3cd.tar.bz2 linux-03606895cd98c0a628b17324fd7b5ff15db7e3cd.zip | |
ipsec: be careful of non existing mac headers
Niccolo Belli reported ipsec crashes in case we handle a frame without
mac header (atm in his case)
Before copying mac header, better make sure it is present.
Bugzilla reference: https://bugzilla.kernel.org/show_bug.cgi?id=42809
Reported-by: Niccolò Belli <darkbasic@linuxsystems.it>
Tested-by: Niccolò Belli <darkbasic@linuxsystems.it>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/xfrm4_mode_beet.c')
| -rw-r--r-- | net/ipv4/xfrm4_mode_beet.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/net/ipv4/xfrm4_mode_beet.c b/net/ipv4/xfrm4_mode_beet.c index 63418185f524..e3db3f915114 100644 --- a/net/ipv4/xfrm4_mode_beet.c +++ b/net/ipv4/xfrm4_mode_beet.c @@ -110,10 +110,7 @@ static int xfrm4_beet_input(struct xfrm_state *x, struct sk_buff *skb) skb_push(skb, sizeof(*iph)); skb_reset_network_header(skb); - - memmove(skb->data - skb->mac_len, skb_mac_header(skb), - skb->mac_len); - skb_set_mac_header(skb, -skb->mac_len); + skb_mac_header_rebuild(skb); xfrm4_beet_make_header(skb); |