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author | David Miller <davem@davemloft.net> | 2015-04-06 04:19:04 +0200 |
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committer | David S. Miller <davem@davemloft.net> | 2015-04-07 21:25:55 +0200 |
commit | 7026b1ddb6b8d4e6ee33dc2bd06c0ca8746fa7ab (patch) | |
tree | 3e11ed0f186ea6066a3f7efecb88d85bc732ee51 /kernel | |
parent | netfilter: Add socket pointer to nf_hook_state. (diff) | |
download | linux-7026b1ddb6b8d4e6ee33dc2bd06c0ca8746fa7ab.tar.xz linux-7026b1ddb6b8d4e6ee33dc2bd06c0ca8746fa7ab.zip |
netfilter: Pass socket pointer down through okfn().
On the output paths in particular, we have to sometimes deal with two
socket contexts. First, and usually skb->sk, is the local socket that
generated the frame.
And second, is potentially the socket used to control a tunneling
socket, such as one the encapsulates using UDP.
We do not want to disassociate skb->sk when encapsulating in order
to fix this, because that would break socket memory accounting.
The most extreme case where this can cause huge problems is an
AF_PACKET socket transmitting over a vxlan device. We hit code
paths doing checks that assume they are dealing with an ipv4
socket, but are actually operating upon the AF_PACKET one.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions