This is a note to let you know that I've just added the patch titled
netfilter: nf_tables: Audit log rule reset
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
netfilter-nf_tables-audit-log-rule-reset.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b91124c8fafd1423039859af55e50a971109938e
Author: Phil Sutter <phil@xxxxxx>
Date: Tue Aug 29 19:51:58 2023 +0200
netfilter: nf_tables: Audit log rule reset
[ Upstream commit ea078ae9108e25fc881c84369f7c03931d22e555 ]
Resetting rules' stateful data happens outside of the transaction logic,
so 'get' and 'dump' handlers have to emit audit log entries themselves.
Fixes: 8daa8fde3fc3f ("netfilter: nf_tables: Introduce NFT_MSG_GETRULE_RESET")
Signed-off-by: Phil Sutter <phil@xxxxxx>
Reviewed-by: Richard Guy Briggs <rgb@xxxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 192bf03aacc52..51b1b7054a233 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -118,6 +118,7 @@ enum audit_nfcfgop {
AUDIT_NFT_OP_FLOWTABLE_REGISTER,
AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
AUDIT_NFT_OP_SETELEM_RESET,
+ AUDIT_NFT_OP_RULE_RESET,
AUDIT_NFT_OP_INVALID,
};
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 87342b7126bcd..eae5dfe9b9a01 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -144,6 +144,7 @@ static const struct audit_nfcfgop_tab audit_nfcfgs[] = {
{ AUDIT_NFT_OP_FLOWTABLE_REGISTER, "nft_register_flowtable" },
{ AUDIT_NFT_OP_FLOWTABLE_UNREGISTER, "nft_unregister_flowtable" },
{ AUDIT_NFT_OP_SETELEM_RESET, "nft_reset_setelem" },
+ { AUDIT_NFT_OP_RULE_RESET, "nft_reset_rule" },
{ AUDIT_NFT_OP_INVALID, "nft_invalid" },
};
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 2e3844d5923f5..cc70482b94907 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -3422,6 +3422,18 @@ static void nf_tables_rule_notify(const struct nft_ctx *ctx,
nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
}
+static void audit_log_rule_reset(const struct nft_table *table,
+ unsigned int base_seq,
+ unsigned int nentries)
+{
+ char *buf = kasprintf(GFP_ATOMIC, "%s:%u",
+ table->name, base_seq);
+
+ audit_log_nfcfg(buf, table->family, nentries,
+ AUDIT_NFT_OP_RULE_RESET, GFP_ATOMIC);
+ kfree(buf);
+}
+
struct nft_rule_dump_ctx {
char *table;
char *chain;
@@ -3528,6 +3540,9 @@ static int nf_tables_dump_rules(struct sk_buff *skb,
done:
rcu_read_unlock();
+ if (reset && idx > cb->args[0])
+ audit_log_rule_reset(table, cb->seq, idx - cb->args[0]);
+
cb->args[0] = idx;
return skb->len;
}
@@ -3635,6 +3650,9 @@ static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
if (err < 0)
goto err_fill_rule_info;
+ if (reset)
+ audit_log_rule_reset(table, nft_pernet(net)->base_seq, 1);
+
return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
err_fill_rule_info:
