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| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2013-08-14 13:05:23 +0200 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2013-08-14 13:07:12 +0200 |
| commit | 628e341f319f1a64a4639088faba952e4ec8f0a8 (patch) | |
| tree | 28fd4b1a02ca00a1abe0b1e71898ab8db6a81dad /net/ipv4/xfrm4_state.c | |
| parent | d9bf5f130946695063469749bfd190087b7fad39 (diff) | |
| download | lwn-628e341f319f1a64a4639088faba952e4ec8f0a8.tar.gz lwn-628e341f319f1a64a4639088faba952e4ec8f0a8.zip | |
xfrm: make local error reporting more robust
In xfrm4 and xfrm6 we need to take care about sockets of the other
address family. This could happen because a 6in4 or 4in6 tunnel could
get protected by ipsec.
Because we don't want to have a run-time dependency on ipv6 when only
using ipv4 xfrm we have to embed a pointer to the correct local_error
function in xfrm_state_afinet and look it up when returning an error
depending on the socket address family.
Thanks to vi0ss for the great bug report:
<https://bugzilla.kernel.org/show_bug.cgi?id=58691>
v2:
a) fix two more unsafe interpretations of skb->sk as ipv6 socket
(xfrm6_local_dontfrag and __xfrm6_output)
v3:
a) add an EXPORT_SYMBOL_GPL(xfrm_local_error) to fix a link error when
building ipv6 as a module (thanks to Steffen Klassert)
Reported-by: <vi0oss@gmail.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/ipv4/xfrm4_state.c')
| -rw-r--r-- | net/ipv4/xfrm4_state.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c index 9258e751baba..0b2a0641526a 100644 --- a/net/ipv4/xfrm4_state.c +++ b/net/ipv4/xfrm4_state.c @@ -83,6 +83,7 @@ static struct xfrm_state_afinfo xfrm4_state_afinfo = { .extract_input = xfrm4_extract_input, .extract_output = xfrm4_extract_output, .transport_finish = xfrm4_transport_finish, + .local_error = xfrm4_local_error, }; void __init xfrm4_state_init(void) |