netdev - [PATCH nf v1] netfilter: nfnetlink: Initialise extack before use in ACKs

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Message-ID: <20240806154324.40764-1-donald.hunter@gmail.com>
Date: Tue,  6 Aug 2024 16:43:24 +0100
From: Donald Hunter <donald.hunter@...il.com>
To: Pablo Neira Ayuso <pablo@...filter.org>,
	Jozsef Kadlecsik <kadlec@...filter.org>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	netfilter-devel@...r.kernel.org,
	netdev@...r.kernel.org
Cc: donald.hunter@...hat.com,
	Donald Hunter <donald.hunter@...il.com>
Subject: [PATCH nf v1] netfilter: nfnetlink: Initialise extack before use in ACKs

Add missing extack initialisation when ACKing BATCH_BEGIN and BATCH_END.

Fixes: bf2ac490d28c ("netfilter: nfnetlink: Handle ACK flags for batch messages")
Signed-off-by: Donald Hunter <donald.hunter@...il.com>
---
 net/netfilter/nfnetlink.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index 4abf660c7baf..932b3ddb34f1 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -427,8 +427,10 @@ static void nfnetlink_rcv_batch(struct sk_buff *skb, struct nlmsghdr *nlh,
 
 	nfnl_unlock(subsys_id);
 
-	if (nlh->nlmsg_flags & NLM_F_ACK)
+	if (nlh->nlmsg_flags & NLM_F_ACK) {
+		memset(&extack, 0, sizeof(extack));
 		nfnl_err_add(&err_list, nlh, 0, &extack);
+	}
 
 	while (skb->len >= nlmsg_total_size(0)) {
 		int msglen, type;
@@ -577,6 +579,7 @@ static void nfnetlink_rcv_batch(struct sk_buff *skb, struct nlmsghdr *nlh,
 			ss->abort(net, oskb, NFNL_ABORT_NONE);
 			netlink_ack(oskb, nlmsg_hdr(oskb), err, NULL);
 		} else if (nlh->nlmsg_flags & NLM_F_ACK) {
+			memset(&extack, 0, sizeof(extack));
 			nfnl_err_add(&err_list, nlh, 0, &extack);
 		}
 	} else {
-- 
2.45.2