From: Liping Zhang <zlpnob...@gmail.com>

[ Upstream commit 277a292835c196894ef895d5e1fd6170bb916f55 ]

Currently, after adding the following nft rules:
  # nft add set x target1 { type ipv4_addr \; flags timeout \;}
  # nft add rule x y set add ip daddr timeout 1d @target1 counter

the counters will always be zero despite of the elements are added
to the dynamic set "target1" or not, as we will break the nft expr
traversal unconditionally:
  # nft list ruleset
  ...
  set target1 {
      ...
      elements = { 8.8.8.8 expires 23h59m53s}
  }
  chain output {
      ...
      set add ip daddr timeout 1d @target1 counter packets 0 bytes 0
                                                           ^       ^
      ...
  }

Since we add the elements to the set successfully, we should continue
to the next expression.

Additionally, if elements are added to "flow table" successfully, we
will _always_ continue to the next expr, even if the operation is
_OP_ADD. So it's better to keep them to be consistent.

Fixes: 22fe54d5fefc ("netfilter: nf_tables: add support for dynamic set 
updates")
Reported-by: Robert White <rwh...@pobox.com>
Signed-off-by: Liping Zhang <zlpnob...@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 net/netfilter/nft_dynset.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/netfilter/nft_dynset.c b/net/netfilter/nft_dynset.c
index 31ca94793aa9..b9dd4e960426 100644
--- a/net/netfilter/nft_dynset.c
+++ b/net/netfilter/nft_dynset.c
@@ -82,8 +82,7 @@ static void nft_dynset_eval(const struct nft_expr *expr,
                    nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
                        timeout = priv->timeout ? : set->timeout;
                        *nft_set_ext_expiration(ext) = jiffies + timeout;
-               } else if (sexpr == NULL)
-                       goto out;
+               }
 
                if (sexpr != NULL)
                        sexpr->ops->eval(sexpr, regs, pkt);
@@ -92,7 +91,7 @@ static void nft_dynset_eval(const struct nft_expr *expr,
                        regs->verdict.code = NFT_BREAK;
                return;
        }
-out:
+
        if (!priv->invert)
                regs->verdict.code = NFT_BREAK;
 }
-- 
2.14.1

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