diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-06-18 17:29:53 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-06-19 01:24:52 +0200 |
| commit | 32f5376003920a8bc1bd97c6cddcf42df0b6a833 (patch) | |
| tree | e88905596468131aa76f99709a1c4e6972f529b6 /crypto/async_tx/async_raid6_recov.c | |
| parent | fd7462de461949e36d70f5b0bc17b98c5a00729c (diff) | |
netfilter: nf_ct_helper: disable automatic helper re-assignment of different type
This patch modifies __nf_ct_try_assign_helper in a way that invalidates support
for the following scenario:
1) attach the helper A for first time when the conntrack is created
2) attach new (different) helper B due to changes the reply tuple caused by NAT
eg. port redirection from TCP/21 to TCP/5060 with both FTP and SIP helpers
loaded, which seems to be a quite unorthodox scenario.
I can provide a more elaborated patch to support this scenario but explicit
helper attachment provides a better solution for this since now the use can
attach the helpers consistently, without relying on the automatic helper
lookup magic.
This patch fixes a possible out of bound zeroing of the conntrack helper
extension if the helper B uses more memory for its private data than
helper A.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'crypto/async_tx/async_raid6_recov.c')
0 files changed, 0 insertions, 0 deletions