[PATCH 4.19 005/191] net/sched: matchall: add missing validation of TCA_MATCHALL_FLAGS

[Greg Kroah-Hartman]

From: Davide Caratti <dcaratti@xxxxxxxxxx>

[ Upstream commit 1afa3cc90f8fb745c777884d79eaa1001d6927a6 ]

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

Fixes: b87f7936a932 ("net/sched: Add match-all classifier hw offloading.")
Signed-off-by: Davide Caratti <dcaratti@xxxxxxxxxx>
Acked-by: Jiri Pirko <jiri@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/sched/cls_matchall.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/sched/cls_matchall.c
+++ b/net/sched/cls_matchall.c
@@ -137,6 +137,7 @@ static void *mall_get(struct tcf_proto *
 static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = {
 	[TCA_MATCHALL_UNSPEC]		= { .type = NLA_UNSPEC },
 	[TCA_MATCHALL_CLASSID]		= { .type = NLA_U32 },
+	[TCA_MATCHALL_FLAGS]		= { .type = NLA_U32 },
 };
 
 static int mall_set_parms(struct net *net, struct tcf_proto *tp,