[ Upstream commit 1e98ffea5a ]
Several netfilter matches and targets put kernel pointers into
info objects, but don't set usersize in descriptors.
This leads to kernel pointer leaks if a match/target is set
and then read back to userspace.
Properly set usersize for these matches/targets.
Found with manual code inspection.
Fixes: ec23189049 ("xtables: extend matches and targets with .usersize")
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Place pointer to hook state in xt_action_param structure instead of
copying the fields that we need. After this change xt_action_param fits
into one cacheline.
This patch also adds a set of new wrapper functions to fetch relevant
hook state structure fields.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
We should report the over quota message to the right net namespace
instead of the init netns.
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
- Move the nfnl_acct_list into the network namespace, initialize
and destroy it per namespace
- Keep track of refcnt on nfacct objects, the old logic does not
longer work with a per namespace list
- Adjust xt_nfacct to pass the namespace when registring objects
Signed-off-by: Andreas Schultz <aschultz@tpip.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
nfacct objects already support accounting at the byte and packet
level. As such it is a natural extension to add the possiblity to
define a ceiling limit for both metrics.
All the support for quotas itself is added to nfnetlink acctounting
framework to stay coherent with current accounting object management.
Quota limit checks are implemented in xt_nfacct filter where
statistic collection is already done.
Pablo Neira Ayuso has also contributed to this feature.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Dmitry Vyukov