[PATCH 5.9 27/49] net: sched: Fix dump of MPLS_OPT_LSE_LABEL attribute in cls_flower

[Greg Kroah-Hartman]

From: Guillaume Nault <gna...@redhat.com>

[ Upstream commit 7fdd375e383097a785bb65c66802e468f398bf82 ]

TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL is a u32 attribute (MPLS label is
20 bits long).

Fixes the following bug:

 $ tc filter add dev ethX ingress protocol mpls_uc \
     flower mpls lse depth 2 label 256             \
     action drop

 $ tc filter show dev ethX ingress
   filter protocol mpls_uc pref 49152 flower chain 0
   filter protocol mpls_uc pref 49152 flower chain 0 handle 0x1
     eth_type 8847
     mpls
       lse depth 2 label 0  <-- invalid label 0, should be 256
   ...

Fixes: 61aec25a6db5 ("cls_flower: Support filtering on multiple MPLS Label 
Stack Entries")
Signed-off-by: Guillaume Nault <gna...@redhat.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 net/sched/cls_flower.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -2424,8 +2424,8 @@ static int fl_dump_key_mpls_opt_lse(stru
                        return err;
        }
        if (lse_mask->mpls_label) {
-               err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL,
-                                lse_key->mpls_label);
+               err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL,
+                                 lse_key->mpls_label);
                if (err)
                        return err;
        }