commit e331473fee3d500bb0d2582a1fe598df3326d8cd
author Davide Caratti <dcaratti@redhat.com> Wed Oct 10 22:00:58 2018 +0200
committer David S. Miller <davem@davemloft.net> Mon Oct 15 21:48:44 2018 -0700
tree 5233db75fb1b9795b27e8cca5c5981a076f8427e
parent 58f5bbe331c566f49c9559568f982202a278aa78

net/sched: cls_api: add missing validation of netlink attributes

Similarly to what has been done in 8b4c3cdd9dd8 ("net: sched: Add policy
validation for tc attributes"), fix classifier code to add validation of
TCA_CHAIN and TCA_KIND netlink attributes.

tested with:
 # ./tdc.py -c filter

v2: Let sch_api and cls_api share nla_policy they have in common, thanks
    to David Ahern.
v3: Avoid EXPORT_SYMBOL(), as validation of those attributes is not done
    by TC modules, thanks to Cong Wang.
    While at it, restore the 'Delete / get qdisc' comment to its orginal
    position, just above tc_get_qdisc() function prototype.

Fixes: 5bc1701881e39 ("net: sched: introduce multichain support for filters")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>