[nf PATCH 2/2] netfilter: nf_tables: Audit log rule reset
Resetting rules' stateful data happens outside of the transaction logic,
so 'get' and 'dump' handlers have to emit audit log entries themselves.
Cc: Richard Guy Briggs <rgb(a)redhat.com>
Fixes: 8daa8fde3fc3f ("netfilter: nf_tables: Introduce NFT_MSG_GETRULE_RESET")
Signed-off-by: Phil Sutter <phil(a)nwl.cc>
---
include/linux/audit.h | 1 +
kernel/auditsc.c | 1 +
net/netfilter/nf_tables_api.c | 18 ++++++++++++++++++
3 files changed, 20 insertions(+)
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 38481e3181975..fc0c7c03eeabe 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 a1218ea4e0c3d..2aa7b9a55cca4 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -3432,6 +3432,18 @@ 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;
@@ -3538,6 +3550,9 @@ 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;
}
@@ -3645,6 +3660,9 @@ 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:
--
2.41.0