From d1a7b382a9d3f0f3e5a80e0be2991c075fa4f618 Mon Sep 17 00:00:00 2001 From: Donald Hunter Date: Tue, 6 Aug 2024 16:43:24 +0100 Subject: [PATCH] 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 Reviewed-by: Simon Horman Signed-off-by: Pablo Neira Ayuso --- 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 @@ replay_abort: 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 @@ done: 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 { -- 2.39.5