6.16-stable review patch. If anyone has any objections, please let me know.
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From: Phil Sutter phil@nwl.cc
[ Upstream commit a1050dd071682d2c9d8d6d5c96119f8f401b62f0 ]
Restore commit 28339b21a365 ("netfilter: nf_tables: do not send complete notification of deletions") and fix it:
- Avoid upfront modification of 'event' variable so the conditionals become effective. - Always include NFTA_OBJ_TYPE attribute in object notifications, user space requires it for proper deserialisation. - Catch DESTROY events, too.
Signed-off-by: Phil Sutter phil@nwl.cc Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Stable-dep-of: b2f742c846ca ("netfilter: nf_tables: restart set lookup on base_seq change") Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/nf_tables_api.c | 67 ++++++++++++++++++++++++++--------- 1 file changed, 50 insertions(+), 17 deletions(-)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 0e86434ca13b0..3a443765d7e90 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -1153,9 +1153,9 @@ static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net, { struct nlmsghdr *nlh;
- event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); - nlh = nfnl_msg_put(skb, portid, seq, event, flags, family, - NFNETLINK_V0, nft_base_seq(net)); + nlh = nfnl_msg_put(skb, portid, seq, + nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event), + flags, family, NFNETLINK_V0, nft_base_seq(net)); if (!nlh) goto nla_put_failure;
@@ -1165,6 +1165,12 @@ static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net, NFTA_TABLE_PAD)) goto nla_put_failure;
+ if (event == NFT_MSG_DELTABLE || + event == NFT_MSG_DESTROYTABLE) { + nlmsg_end(skb, nlh); + return 0; + } + if (nla_put_be32(skb, NFTA_TABLE_FLAGS, htonl(table->flags & NFT_TABLE_F_MASK))) goto nla_put_failure; @@ -2022,9 +2028,9 @@ static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net, { struct nlmsghdr *nlh;
- event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); - nlh = nfnl_msg_put(skb, portid, seq, event, flags, family, - NFNETLINK_V0, nft_base_seq(net)); + nlh = nfnl_msg_put(skb, portid, seq, + nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event), + flags, family, NFNETLINK_V0, nft_base_seq(net)); if (!nlh) goto nla_put_failure;
@@ -2034,6 +2040,13 @@ static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net, NFTA_CHAIN_PAD)) goto nla_put_failure;
+ if (!hook_list && + (event == NFT_MSG_DELCHAIN || + event == NFT_MSG_DESTROYCHAIN)) { + nlmsg_end(skb, nlh); + return 0; + } + if (nft_is_base_chain(chain)) { const struct nft_base_chain *basechain = nft_base_chain(chain); struct nft_stats __percpu *stats; @@ -4871,9 +4884,10 @@ static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx, u32 seq = ctx->seq; int i;
- event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); - nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family, - NFNETLINK_V0, nft_base_seq(ctx->net)); + nlh = nfnl_msg_put(skb, portid, seq, + nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event), + flags, ctx->family, NFNETLINK_V0, + nft_base_seq(ctx->net)); if (!nlh) goto nla_put_failure;
@@ -4885,6 +4899,12 @@ static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx, NFTA_SET_PAD)) goto nla_put_failure;
+ if (event == NFT_MSG_DELSET || + event == NFT_MSG_DESTROYSET) { + nlmsg_end(skb, nlh); + return 0; + } + if (set->flags != 0) if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags))) goto nla_put_failure; @@ -8359,20 +8379,26 @@ static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net, { struct nlmsghdr *nlh;
- event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); - nlh = nfnl_msg_put(skb, portid, seq, event, flags, family, - NFNETLINK_V0, nft_base_seq(net)); + nlh = nfnl_msg_put(skb, portid, seq, + nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event), + flags, family, NFNETLINK_V0, nft_base_seq(net)); if (!nlh) goto nla_put_failure;
if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) || nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) || + nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) || nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle), NFTA_OBJ_PAD)) goto nla_put_failure;
- if (nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) || - nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) || + if (event == NFT_MSG_DELOBJ || + event == NFT_MSG_DESTROYOBJ) { + nlmsg_end(skb, nlh); + return 0; + } + + if (nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) || nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset)) goto nla_put_failure;
@@ -9413,9 +9439,9 @@ static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net, struct nft_hook *hook; struct nlmsghdr *nlh;
- event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); - nlh = nfnl_msg_put(skb, portid, seq, event, flags, family, - NFNETLINK_V0, nft_base_seq(net)); + nlh = nfnl_msg_put(skb, portid, seq, + nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event), + flags, family, NFNETLINK_V0, nft_base_seq(net)); if (!nlh) goto nla_put_failure;
@@ -9425,6 +9451,13 @@ static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net, NFTA_FLOWTABLE_PAD)) goto nla_put_failure;
+ if (!hook_list && + (event == NFT_MSG_DELFLOWTABLE || + event == NFT_MSG_DESTROYFLOWTABLE)) { + nlmsg_end(skb, nlh); + return 0; + } + if (nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) || nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags))) goto nla_put_failure;