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net/sched: flower: add missing validation of TCA_FLOWER_FLAGS 

[ Upstream commit e2debf0852 ]

unlike other classifiers that can be offloaded (i.e. users can set flags
like 'skip_hw' and 'skip_sw'), 'cls_flower' doesn't validate the size of
netlink attribute 'TCA_FLOWER_FLAGS' provided by user: add a proper entry
to fl_policy.

Fixes: 5b33f48842 ("net/flower: Introduce hardware offload support")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Davide Caratti 2020-02-11 19:33:40 +01:00 committed by Greg Kroah-Hartman
parent 58cd462bc5
commit 60e055d59d
1 changed files with 1 additions and 0 deletions
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net/sched/cls_flower.c
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@ -689,6 +689,7 @@ static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
.len = 128 / BITS_PER_BYTE },
[TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY,
.len = 128 / BITS_PER_BYTE },
[TCA_FLOWER_FLAGS] = { .type = NLA_U32 },
};
static const struct nla_policy