[PATCH nf 2/2] netfilter: nft_last: incorrect arithmetics when restoring last used

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Subtract the jiffies that have passed by to current jiffies to fix last
used restoration.

Fixes: 836382dc2471 ("netfilter: nf_tables: add last expression")
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
 net/netfilter/nft_last.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nft_last.c b/net/netfilter/nft_last.c
index bbb352b64c73..8088b99f2ee3 100644
--- a/net/netfilter/nft_last.c
+++ b/net/netfilter/nft_last.c
@@ -37,7 +37,7 @@ static int nft_last_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
 		if (err < 0)
 			return err;
 
-		priv->last_jiffies = jiffies + (unsigned long)last_jiffies;
+		priv->last_jiffies = jiffies - (unsigned long)last_jiffies;
 	}
 
 	return 0;
-- 
2.20.1




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