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authorOr Gerlitz <ogerlitz@mellanox.com>2016-12-22 14:28:15 +0200
committerDavid S. Miller <davem@davemloft.net>2016-12-23 11:59:56 -0500
commitd9724772e69cb8076231202292665ca74eec13e1 (patch)
tree98863f3ad1541e041d7a043f2f46005e45cd3fbd /net
parentdc594ecd4185831031d3fef2853ee76908428107 (diff)
downloadop-kernel-dev-d9724772e69cb8076231202292665ca74eec13e1.zip
op-kernel-dev-d9724772e69cb8076231202292665ca74eec13e1.tar.gz
net/sched: cls_flower: Mandate mask when matching on flags
When matching on flags, we should require the user to provide the mask and avoid using an all-ones mask. Not doing so causes matching on flags provided w.o mask to hit on the value being unset for all flags, which may not what the user wanted to happen. Fixes: faa3ffce7829 ('net/sched: cls_flower: Add support for matching on flags') Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Reported-by: Paul Blakey <paulb@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sched/cls_flower.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 35ac28d..333f8e2 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -442,32 +442,32 @@ static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
}
}
-static void fl_set_key_flags(struct nlattr **tb,
- u32 *flags_key, u32 *flags_mask)
+static int fl_set_key_flags(struct nlattr **tb,
+ u32 *flags_key, u32 *flags_mask)
{
u32 key, mask;
- if (!tb[TCA_FLOWER_KEY_FLAGS])
- return;
+ /* mask is mandatory for flags */
+ if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
+ return -EINVAL;
key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
-
- if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
- mask = ~0;
- else
- mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
+ mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
*flags_key = 0;
*flags_mask = 0;
fl_set_key_flag(key, mask, flags_key, flags_mask,
TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
+
+ return 0;
}
static int fl_set_key(struct net *net, struct nlattr **tb,
struct fl_flow_key *key, struct fl_flow_key *mask)
{
__be16 ethertype;
+ int ret = 0;
#ifdef CONFIG_NET_CLS_IND
if (tb[TCA_FLOWER_INDEV]) {
int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
@@ -614,9 +614,10 @@ static int fl_set_key(struct net *net, struct nlattr **tb,
&mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
sizeof(key->enc_tp.dst));
- fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
+ if (tb[TCA_FLOWER_KEY_FLAGS])
+ ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
- return 0;
+ return ret;
}
static bool fl_mask_eq(struct fl_flow_mask *mask1,
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