From: Florian Westphal <fw@strlen.de>
Date: Thu, 13 Apr 2023 15:13:19 +0000 (+0200)
Subject: netfilter: nf_tables: don't write table validation state without mutex
X-Git-Tag: v6.6.17~4755^2~56^2~15
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9a32e9850686599ed194ccdceb6cd3dd56b2d9b9;p=platform%2Fkernel%2Flinux-rpi.git

netfilter: nf_tables: don't write table validation state without mutex

The ->cleanup callback needs to be removed, this doesn't work anymore as
the transaction mutex is already released in the ->abort function.

Just do it after a successful validation pass, this either happens
from commit or abort phases where transaction mutex is held.

Fixes: f102d66b335a ("netfilter: nf_tables: use dedicated mutex to guard transactions")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

diff --git a/include/linux/netfilter/nfnetlink.h b/include/linux/netfilter/nfnetlink.h
index 241e005..e9a9ab3 100644
--- a/include/linux/netfilter/nfnetlink.h
+++ b/include/linux/netfilter/nfnetlink.h
@@ -45,7 +45,6 @@ struct nfnetlink_subsystem {
 	int (*commit)(struct net *net, struct sk_buff *skb);
 	int (*abort)(struct net *net, struct sk_buff *skb,
 		     enum nfnl_abort_action action);
-	void (*cleanup)(struct net *net);
 	bool (*valid_genid)(struct net *net, u32 genid);
 };
 
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 0e1c86b..21eb273 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -8639,6 +8639,8 @@ static int nf_tables_validate(struct net *net)
 			if (nft_table_validate(net, table) < 0)
 				return -EAGAIN;
 		}
+
+		nft_validate_state_update(net, NFT_VALIDATE_SKIP);
 		break;
 	}
 
@@ -9578,11 +9580,6 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
 	return 0;
 }
 
-static void nf_tables_cleanup(struct net *net)
-{
-	nft_validate_state_update(net, NFT_VALIDATE_SKIP);
-}
-
 static int nf_tables_abort(struct net *net, struct sk_buff *skb,
 			   enum nfnl_abort_action action)
 {
@@ -9616,7 +9613,6 @@ static const struct nfnetlink_subsystem nf_tables_subsys = {
 	.cb		= nf_tables_cb,
 	.commit		= nf_tables_commit,
 	.abort		= nf_tables_abort,
-	.cleanup	= nf_tables_cleanup,
 	.valid_genid	= nf_tables_valid_genid,
 	.owner		= THIS_MODULE,
 };
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index 81c7737..ae71464 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -590,8 +590,6 @@ done:
 			goto replay_abort;
 		}
 	}
-	if (ss->cleanup)
-		ss->cleanup(net);
 
 	nfnl_err_deliver(&err_list, oskb);
 	kfree_skb(skb);