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* [PATCH v3] audit: log nftables configuration change events once per table
@ 2021-03-23 20:04 Richard Guy Briggs
  2021-03-23 21:36 ` Florian Westphal
  2021-03-24 16:32 ` Paul Moore
  0 siblings, 2 replies; 4+ messages in thread
From: Richard Guy Briggs @ 2021-03-23 20:04 UTC (permalink / raw)
  To: Linux-Audit Mailing List, LKML, netfilter-devel
  Cc: Jones Desougi, Richard Guy Briggs, Phil Sutter, Florian Westphal,
	twoerner, Eric Paris, tgraf, dan.carpenter

Reduce logging of nftables events to a level similar to iptables.
Restore the table field to list the table, adding the generation.

Indicate the op as the most significant operation in the event.

A couple of sample events:

type=PROCTITLE msg=audit(2021-03-18 09:30:49.801:143) : proctitle=/usr/bin/python3 -s /usr/sbin/firewalld --nofork --nopid
type=SYSCALL msg=audit(2021-03-18 09:30:49.801:143) : arch=x86_64 syscall=sendmsg success=yes exit=172 a0=0x6 a1=0x7ffdcfcbe650 a2=0x0 a3=0x7ffdcfcbd52c items=0 ppid=1 pid=367 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=roo
t sgid=root fsgid=root tty=(none) ses=unset comm=firewalld exe=/usr/bin/python3.9 subj=system_u:system_r:firewalld_t:s0 key=(null)
type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=ipv6 entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=ipv4 entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=inet entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld

type=PROCTITLE msg=audit(2021-03-18 09:30:49.839:144) : proctitle=/usr/bin/python3 -s /usr/sbin/firewalld --nofork --nopid
type=SYSCALL msg=audit(2021-03-18 09:30:49.839:144) : arch=x86_64 syscall=sendmsg success=yes exit=22792 a0=0x6 a1=0x7ffdcfcbe650 a2=0x0 a3=0x7ffdcfcbd52c items=0 ppid=1 pid=367 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=r
oot sgid=root fsgid=root tty=(none) ses=unset comm=firewalld exe=/usr/bin/python3.9 subj=system_u:system_r:firewalld_t:s0 key=(null)
type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=ipv6 entries=30 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=ipv4 entries=30 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=inet entries=165 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld

The issue was originally documented in
https://github.com/linux-audit/audit-kernel/issues/124

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
---
Changelog:
v3:
- fix function braces, reduce parameter scope
- pre-allocate nft_audit_data per table in step 1, bail on ENOMEM

v2:
- convert NFT ops to array indicies in nft2audit_op[]
- use linux lists
- use functions for each of collection and logging of audit data
---
 include/linux/audit.h         |  28 ++++++
 net/netfilter/nf_tables_api.c | 160 ++++++++++++++++------------------
 2 files changed, 105 insertions(+), 83 deletions(-)

diff --git a/include/linux/audit.h b/include/linux/audit.h
index 82b7c1116a85..5fafcf4c13de 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -118,6 +118,34 @@ enum audit_nfcfgop {
 	AUDIT_NFT_OP_INVALID,
 };
 
+static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
+	[NFT_MSG_NEWTABLE]	= AUDIT_NFT_OP_TABLE_REGISTER,
+	[NFT_MSG_GETTABLE]	= AUDIT_NFT_OP_INVALID,
+	[NFT_MSG_DELTABLE]	= AUDIT_NFT_OP_TABLE_UNREGISTER,
+	[NFT_MSG_NEWCHAIN]	= AUDIT_NFT_OP_CHAIN_REGISTER,
+	[NFT_MSG_GETCHAIN]	= AUDIT_NFT_OP_INVALID,
+	[NFT_MSG_DELCHAIN]	= AUDIT_NFT_OP_CHAIN_UNREGISTER,
+	[NFT_MSG_NEWRULE]	= AUDIT_NFT_OP_RULE_REGISTER,
+	[NFT_MSG_GETRULE]	= AUDIT_NFT_OP_INVALID,
+	[NFT_MSG_DELRULE]	= AUDIT_NFT_OP_RULE_UNREGISTER,
+	[NFT_MSG_NEWSET]	= AUDIT_NFT_OP_SET_REGISTER,
+	[NFT_MSG_GETSET]	= AUDIT_NFT_OP_INVALID,
+	[NFT_MSG_DELSET]	= AUDIT_NFT_OP_SET_UNREGISTER,
+	[NFT_MSG_NEWSETELEM]	= AUDIT_NFT_OP_SETELEM_REGISTER,
+	[NFT_MSG_GETSETELEM]	= AUDIT_NFT_OP_INVALID,
+	[NFT_MSG_DELSETELEM]	= AUDIT_NFT_OP_SETELEM_UNREGISTER,
+	[NFT_MSG_NEWGEN]	= AUDIT_NFT_OP_GEN_REGISTER,
+	[NFT_MSG_GETGEN]	= AUDIT_NFT_OP_INVALID,
+	[NFT_MSG_TRACE]		= AUDIT_NFT_OP_INVALID,
+	[NFT_MSG_NEWOBJ]	= AUDIT_NFT_OP_OBJ_REGISTER,
+	[NFT_MSG_GETOBJ]	= AUDIT_NFT_OP_INVALID,
+	[NFT_MSG_DELOBJ]	= AUDIT_NFT_OP_OBJ_UNREGISTER,
+	[NFT_MSG_GETOBJ_RESET]	= AUDIT_NFT_OP_OBJ_RESET,
+	[NFT_MSG_NEWFLOWTABLE]	= AUDIT_NFT_OP_FLOWTABLE_REGISTER,
+	[NFT_MSG_GETFLOWTABLE]	= AUDIT_NFT_OP_INVALID,
+	[NFT_MSG_DELFLOWTABLE]	= AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
+};
+
 extern int is_audit_feature_set(int which);
 
 extern int __init audit_register_class(int class, unsigned *list);
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index c1eb5cdb3033..e48554a5c14e 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -66,6 +66,13 @@ static const struct rhashtable_params nft_objname_ht_params = {
 	.automatic_shrinking	= true,
 };
 
+struct nft_audit_data {
+	struct nft_table *table;
+	int entries;
+	int op;
+	struct list_head list;
+};
+
 static void nft_validate_state_update(struct net *net, u8 new_validate_state)
 {
 	switch (net->nft.validate_state) {
@@ -717,17 +724,6 @@ static void nf_tables_table_notify(const struct nft_ctx *ctx, int event)
 {
 	struct sk_buff *skb;
 	int err;
-	char *buf = kasprintf(GFP_KERNEL, "%s:%llu;?:0",
-			      ctx->table->name, ctx->table->handle);
-
-	audit_log_nfcfg(buf,
-			ctx->family,
-			ctx->table->use,
-			event == NFT_MSG_NEWTABLE ?
-				AUDIT_NFT_OP_TABLE_REGISTER :
-				AUDIT_NFT_OP_TABLE_UNREGISTER,
-			GFP_KERNEL);
-	kfree(buf);
 
 	if (!ctx->report &&
 	    !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
@@ -1491,18 +1487,6 @@ static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event)
 {
 	struct sk_buff *skb;
 	int err;
-	char *buf = kasprintf(GFP_KERNEL, "%s:%llu;%s:%llu",
-			      ctx->table->name, ctx->table->handle,
-			      ctx->chain->name, ctx->chain->handle);
-
-	audit_log_nfcfg(buf,
-			ctx->family,
-			ctx->chain->use,
-			event == NFT_MSG_NEWCHAIN ?
-				AUDIT_NFT_OP_CHAIN_REGISTER :
-				AUDIT_NFT_OP_CHAIN_UNREGISTER,
-			GFP_KERNEL);
-	kfree(buf);
 
 	if (!ctx->report &&
 	    !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
@@ -2855,18 +2839,6 @@ static void nf_tables_rule_notify(const struct nft_ctx *ctx,
 {
 	struct sk_buff *skb;
 	int err;
-	char *buf = kasprintf(GFP_KERNEL, "%s:%llu;%s:%llu",
-			      ctx->table->name, ctx->table->handle,
-			      ctx->chain->name, ctx->chain->handle);
-
-	audit_log_nfcfg(buf,
-			ctx->family,
-			rule->handle,
-			event == NFT_MSG_NEWRULE ?
-				AUDIT_NFT_OP_RULE_REGISTER :
-				AUDIT_NFT_OP_RULE_UNREGISTER,
-			GFP_KERNEL);
-	kfree(buf);
 
 	if (!ctx->report &&
 	    !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
@@ -3901,18 +3873,6 @@ static void nf_tables_set_notify(const struct nft_ctx *ctx,
 	struct sk_buff *skb;
 	u32 portid = ctx->portid;
 	int err;
-	char *buf = kasprintf(gfp_flags, "%s:%llu;%s:%llu",
-			      ctx->table->name, ctx->table->handle,
-			      set->name, set->handle);
-
-	audit_log_nfcfg(buf,
-			ctx->family,
-			set->field_count,
-			event == NFT_MSG_NEWSET ?
-				AUDIT_NFT_OP_SET_REGISTER :
-				AUDIT_NFT_OP_SET_UNREGISTER,
-			gfp_flags);
-	kfree(buf);
 
 	if (!ctx->report &&
 	    !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
@@ -5097,18 +5057,6 @@ static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
 	u32 portid = ctx->portid;
 	struct sk_buff *skb;
 	int err;
-	char *buf = kasprintf(GFP_KERNEL, "%s:%llu;%s:%llu",
-			      ctx->table->name, ctx->table->handle,
-			      set->name, set->handle);
-
-	audit_log_nfcfg(buf,
-			ctx->family,
-			set->handle,
-			event == NFT_MSG_NEWSETELEM ?
-				AUDIT_NFT_OP_SETELEM_REGISTER :
-				AUDIT_NFT_OP_SETELEM_UNREGISTER,
-			GFP_KERNEL);
-	kfree(buf);
 
 	if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
 		return;
@@ -6310,12 +6258,11 @@ static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
 			    filter->type != NFT_OBJECT_UNSPEC &&
 			    obj->ops->type->type != filter->type)
 				goto cont;
-
 			if (reset) {
 				char *buf = kasprintf(GFP_ATOMIC,
-						      "%s:%llu;?:0",
+						      "%s:%u",
 						      table->name,
-						      table->handle);
+						      net->nft.base_seq);
 
 				audit_log_nfcfg(buf,
 						family,
@@ -6436,8 +6383,8 @@ static int nf_tables_getobj(struct net *net, struct sock *nlsk,
 		reset = true;
 
 	if (reset) {
-		char *buf = kasprintf(GFP_ATOMIC, "%s:%llu;?:0",
-				      table->name, table->handle);
+		char *buf = kasprintf(GFP_ATOMIC, "%s:%u",
+				      table->name, net->nft.base_seq);
 
 		audit_log_nfcfg(buf,
 				family,
@@ -6525,15 +6472,15 @@ void nft_obj_notify(struct net *net, const struct nft_table *table,
 {
 	struct sk_buff *skb;
 	int err;
-	char *buf = kasprintf(gfp, "%s:%llu;?:0",
-			      table->name, table->handle);
+	char *buf = kasprintf(gfp, "%s:%u",
+			      table->name, net->nft.base_seq);
 
 	audit_log_nfcfg(buf,
 			family,
 			obj->handle,
 			event == NFT_MSG_NEWOBJ ?
-				AUDIT_NFT_OP_OBJ_REGISTER :
-				AUDIT_NFT_OP_OBJ_UNREGISTER,
+				 AUDIT_NFT_OP_OBJ_REGISTER :
+				 AUDIT_NFT_OP_OBJ_UNREGISTER,
 			gfp);
 	kfree(buf);
 
@@ -7333,18 +7280,6 @@ static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
 {
 	struct sk_buff *skb;
 	int err;
-	char *buf = kasprintf(GFP_KERNEL, "%s:%llu;%s:%llu",
-			      flowtable->table->name, flowtable->table->handle,
-			      flowtable->name, flowtable->handle);
-
-	audit_log_nfcfg(buf,
-			ctx->family,
-			flowtable->hooknum,
-			event == NFT_MSG_NEWFLOWTABLE ?
-				AUDIT_NFT_OP_FLOWTABLE_REGISTER :
-				AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
-			GFP_KERNEL);
-	kfree(buf);
 
 	if (!ctx->report &&
 	    !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
@@ -7465,9 +7400,6 @@ static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
 	struct sk_buff *skb2;
 	int err;
 
-	audit_log_nfcfg("?:0;?:0", 0, net->nft.base_seq,
-			AUDIT_NFT_OP_GEN_REGISTER, GFP_KERNEL);
-
 	if (!nlmsg_report(nlh) &&
 	    !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
 		return;
@@ -8006,12 +7938,65 @@ static void nft_commit_notify(struct net *net, u32 portid)
 	WARN_ON_ONCE(!list_empty(&net->nft.notify_list));
 }
 
+int nf_tables_commit_audit_alloc(struct list_head *adl,
+				 struct nft_table *table)
+{
+	struct nft_audit_data *adp;
+
+	list_for_each_entry(adp, adl, list) {
+		if (adp->table == table)
+			return 0;
+	}
+	adp = kzalloc(sizeof(*adp), GFP_KERNEL);
+	if (!adp)
+		return -ENOMEM;
+	adp->table = table;
+	INIT_LIST_HEAD(&adp->list);
+	list_add(&adp->list, adl);
+	return 0;
+}
+
+void nf_tables_commit_audit_collect(struct list_head *adl,
+				    struct nft_table *table, u32 op)
+{
+	struct nft_audit_data *adp;
+
+	list_for_each_entry(adp, adl, list) {
+		if (adp->table == table)
+			goto found;
+	}
+	WARN_ONCE("table=%s not expected in commit list", table->name);
+	return;
+found:
+	adp->entries++;
+	if (!adp->op || adp->op > op)
+		adp->op = op;
+}
+
+#define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
+
+void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
+{
+	struct nft_audit_data *adp, *adn;
+	char aubuf[AUNFTABLENAMELEN];
+
+	list_for_each_entry_safe(adp, adn, adl, list) {
+		snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
+			 generation);
+		audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
+				nft2audit_op[adp->op], GFP_KERNEL);
+		list_del(&adp->list);
+		kfree(adp);
+	}
+}
+
 static int nf_tables_commit(struct net *net, struct sk_buff *skb)
 {
 	struct nft_trans *trans, *next;
 	struct nft_trans_elem *te;
 	struct nft_chain *chain;
 	struct nft_table *table;
+	LIST_HEAD(adl);
 	int err;
 
 	if (list_empty(&net->nft.commit_list)) {
@@ -8031,6 +8016,11 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
 	list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) {
 		int ret;
 
+		ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
+		if (ret) {
+			nf_tables_commit_chain_prepare_cancel(net);
+			return ret;
+		}
 		if (trans->msg_type == NFT_MSG_NEWRULE ||
 		    trans->msg_type == NFT_MSG_DELRULE) {
 			chain = trans->ctx.chain;
@@ -8206,12 +8196,16 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
 			}
 			break;
 		}
+		nf_tables_commit_audit_collect(&adl, trans->ctx.table,
+					       trans->msg_type);
 	}
 
 	nft_commit_notify(net, NETLINK_CB(skb).portid);
 	nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
 	nf_tables_commit_release(net);
 
+	nf_tables_commit_audit_log(&adl, net->nft.base_seq);
+
 	return 0;
 }
 
-- 
2.27.0

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https://listman.redhat.com/mailman/listinfo/linux-audit


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH v3] audit: log nftables configuration change events once per table
  2021-03-23 20:04 [PATCH v3] audit: log nftables configuration change events once per table Richard Guy Briggs
@ 2021-03-23 21:36 ` Florian Westphal
  2021-03-24 16:32 ` Paul Moore
  1 sibling, 0 replies; 4+ messages in thread
From: Florian Westphal @ 2021-03-23 21:36 UTC (permalink / raw)
  To: Richard Guy Briggs
  Cc: Jones Desougi, Phil Sutter, Florian Westphal, LKML,
	Linux-Audit Mailing List, netfilter-devel, twoerner, Eric Paris,
	tgraf, dan.carpenter

Richard Guy Briggs <rgb@redhat.com> wrote:
>  	nft_commit_notify(net, NETLINK_CB(skb).portid);
>  	nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
>  	nf_tables_commit_release(net);
>  
> +	nf_tables_commit_audit_log(&adl, net->nft.base_seq);

This meeds to be before nf_tables_commit_release() call, afaics this function
dereferences data structures that might be free'd already here.

--
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https://listman.redhat.com/mailman/listinfo/linux-audit


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH v3] audit: log nftables configuration change events once per table
  2021-03-23 20:04 [PATCH v3] audit: log nftables configuration change events once per table Richard Guy Briggs
  2021-03-23 21:36 ` Florian Westphal
@ 2021-03-24 16:32 ` Paul Moore
  2021-03-25  3:15   ` Richard Guy Briggs
  1 sibling, 1 reply; 4+ messages in thread
From: Paul Moore @ 2021-03-24 16:32 UTC (permalink / raw)
  To: Richard Guy Briggs
  Cc: Jones Desougi, Phil Sutter, Florian Westphal, LKML,
	Linux-Audit Mailing List, netfilter-devel, twoerner, Eric Paris,
	tgraf, dan.carpenter

On Tue, Mar 23, 2021 at 4:05 PM Richard Guy Briggs <rgb@redhat.com> wrote:
>
> Reduce logging of nftables events to a level similar to iptables.
> Restore the table field to list the table, adding the generation.
>
> Indicate the op as the most significant operation in the event.
>
> A couple of sample events:
>
> type=PROCTITLE msg=audit(2021-03-18 09:30:49.801:143) : proctitle=/usr/bin/python3 -s /usr/sbin/firewalld --nofork --nopid
> type=SYSCALL msg=audit(2021-03-18 09:30:49.801:143) : arch=x86_64 syscall=sendmsg success=yes exit=172 a0=0x6 a1=0x7ffdcfcbe650 a2=0x0 a3=0x7ffdcfcbd52c items=0 ppid=1 pid=367 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=roo
> t sgid=root fsgid=root tty=(none) ses=unset comm=firewalld exe=/usr/bin/python3.9 subj=system_u:system_r:firewalld_t:s0 key=(null)
> type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=ipv6 entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
> type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=ipv4 entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
> type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=inet entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
>
> type=PROCTITLE msg=audit(2021-03-18 09:30:49.839:144) : proctitle=/usr/bin/python3 -s /usr/sbin/firewalld --nofork --nopid
> type=SYSCALL msg=audit(2021-03-18 09:30:49.839:144) : arch=x86_64 syscall=sendmsg success=yes exit=22792 a0=0x6 a1=0x7ffdcfcbe650 a2=0x0 a3=0x7ffdcfcbd52c items=0 ppid=1 pid=367 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=r
> oot sgid=root fsgid=root tty=(none) ses=unset comm=firewalld exe=/usr/bin/python3.9 subj=system_u:system_r:firewalld_t:s0 key=(null)
> type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=ipv6 entries=30 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
> type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=ipv4 entries=30 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
> type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=inet entries=165 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
>
> The issue was originally documented in
> https://github.com/linux-audit/audit-kernel/issues/124
>
> Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
> ---
> Changelog:
> v3:
> - fix function braces, reduce parameter scope
> - pre-allocate nft_audit_data per table in step 1, bail on ENOMEM
>
> v2:
> - convert NFT ops to array indicies in nft2audit_op[]
> - use linux lists
> - use functions for each of collection and logging of audit data
> ---
>  include/linux/audit.h         |  28 ++++++
>  net/netfilter/nf_tables_api.c | 160 ++++++++++++++++------------------
>  2 files changed, 105 insertions(+), 83 deletions(-)

...

> diff --git a/include/linux/audit.h b/include/linux/audit.h
> index 82b7c1116a85..5fafcf4c13de 100644
> --- a/include/linux/audit.h
> +++ b/include/linux/audit.h
> @@ -118,6 +118,34 @@ enum audit_nfcfgop {
>         AUDIT_NFT_OP_INVALID,
>  };
>
> +static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
> +       [NFT_MSG_NEWTABLE]      = AUDIT_NFT_OP_TABLE_REGISTER,
> +       [NFT_MSG_GETTABLE]      = AUDIT_NFT_OP_INVALID,
> +       [NFT_MSG_DELTABLE]      = AUDIT_NFT_OP_TABLE_UNREGISTER,
> +       [NFT_MSG_NEWCHAIN]      = AUDIT_NFT_OP_CHAIN_REGISTER,
> +       [NFT_MSG_GETCHAIN]      = AUDIT_NFT_OP_INVALID,
> +       [NFT_MSG_DELCHAIN]      = AUDIT_NFT_OP_CHAIN_UNREGISTER,
> +       [NFT_MSG_NEWRULE]       = AUDIT_NFT_OP_RULE_REGISTER,
> +       [NFT_MSG_GETRULE]       = AUDIT_NFT_OP_INVALID,
> +       [NFT_MSG_DELRULE]       = AUDIT_NFT_OP_RULE_UNREGISTER,
> +       [NFT_MSG_NEWSET]        = AUDIT_NFT_OP_SET_REGISTER,
> +       [NFT_MSG_GETSET]        = AUDIT_NFT_OP_INVALID,
> +       [NFT_MSG_DELSET]        = AUDIT_NFT_OP_SET_UNREGISTER,
> +       [NFT_MSG_NEWSETELEM]    = AUDIT_NFT_OP_SETELEM_REGISTER,
> +       [NFT_MSG_GETSETELEM]    = AUDIT_NFT_OP_INVALID,
> +       [NFT_MSG_DELSETELEM]    = AUDIT_NFT_OP_SETELEM_UNREGISTER,
> +       [NFT_MSG_NEWGEN]        = AUDIT_NFT_OP_GEN_REGISTER,
> +       [NFT_MSG_GETGEN]        = AUDIT_NFT_OP_INVALID,
> +       [NFT_MSG_TRACE]         = AUDIT_NFT_OP_INVALID,
> +       [NFT_MSG_NEWOBJ]        = AUDIT_NFT_OP_OBJ_REGISTER,
> +       [NFT_MSG_GETOBJ]        = AUDIT_NFT_OP_INVALID,
> +       [NFT_MSG_DELOBJ]        = AUDIT_NFT_OP_OBJ_UNREGISTER,
> +       [NFT_MSG_GETOBJ_RESET]  = AUDIT_NFT_OP_OBJ_RESET,
> +       [NFT_MSG_NEWFLOWTABLE]  = AUDIT_NFT_OP_FLOWTABLE_REGISTER,
> +       [NFT_MSG_GETFLOWTABLE]  = AUDIT_NFT_OP_INVALID,
> +       [NFT_MSG_DELFLOWTABLE]  = AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
> +};

The previously reported problem with this as a static still exists,
correct?  It does seem like this should live in nf_tables_api.c
doesn't it?

-- 
paul moore
www.paul-moore.com

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^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH v3] audit: log nftables configuration change events once per table
  2021-03-24 16:32 ` Paul Moore
@ 2021-03-25  3:15   ` Richard Guy Briggs
  0 siblings, 0 replies; 4+ messages in thread
From: Richard Guy Briggs @ 2021-03-25  3:15 UTC (permalink / raw)
  To: Paul Moore
  Cc: Jones Desougi, Phil Sutter, Florian Westphal, LKML,
	Linux-Audit Mailing List, netfilter-devel, twoerner, Eric Paris,
	tgraf, dan.carpenter

On 2021-03-24 12:32, Paul Moore wrote:
> On Tue, Mar 23, 2021 at 4:05 PM Richard Guy Briggs <rgb@redhat.com> wrote:
> >
> > Reduce logging of nftables events to a level similar to iptables.
> > Restore the table field to list the table, adding the generation.
> >
> > Indicate the op as the most significant operation in the event.
> >
> > A couple of sample events:
> >
> > type=PROCTITLE msg=audit(2021-03-18 09:30:49.801:143) : proctitle=/usr/bin/python3 -s /usr/sbin/firewalld --nofork --nopid
> > type=SYSCALL msg=audit(2021-03-18 09:30:49.801:143) : arch=x86_64 syscall=sendmsg success=yes exit=172 a0=0x6 a1=0x7ffdcfcbe650 a2=0x0 a3=0x7ffdcfcbd52c items=0 ppid=1 pid=367 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=roo
> > t sgid=root fsgid=root tty=(none) ses=unset comm=firewalld exe=/usr/bin/python3.9 subj=system_u:system_r:firewalld_t:s0 key=(null)
> > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=ipv6 entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
> > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=ipv4 entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
> > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=inet entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
> >
> > type=PROCTITLE msg=audit(2021-03-18 09:30:49.839:144) : proctitle=/usr/bin/python3 -s /usr/sbin/firewalld --nofork --nopid
> > type=SYSCALL msg=audit(2021-03-18 09:30:49.839:144) : arch=x86_64 syscall=sendmsg success=yes exit=22792 a0=0x6 a1=0x7ffdcfcbe650 a2=0x0 a3=0x7ffdcfcbd52c items=0 ppid=1 pid=367 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=r
> > oot sgid=root fsgid=root tty=(none) ses=unset comm=firewalld exe=/usr/bin/python3.9 subj=system_u:system_r:firewalld_t:s0 key=(null)
> > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=ipv6 entries=30 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
> > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=ipv4 entries=30 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
> > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=inet entries=165 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld
> >
> > The issue was originally documented in
> > https://github.com/linux-audit/audit-kernel/issues/124
> >
> > Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
> > ---
> > Changelog:
> > v3:
> > - fix function braces, reduce parameter scope
> > - pre-allocate nft_audit_data per table in step 1, bail on ENOMEM
> >
> > v2:
> > - convert NFT ops to array indicies in nft2audit_op[]
> > - use linux lists
> > - use functions for each of collection and logging of audit data
> > ---
> >  include/linux/audit.h         |  28 ++++++
> >  net/netfilter/nf_tables_api.c | 160 ++++++++++++++++------------------
> >  2 files changed, 105 insertions(+), 83 deletions(-)
> 
> ...
> 
> > diff --git a/include/linux/audit.h b/include/linux/audit.h
> > index 82b7c1116a85..5fafcf4c13de 100644
> > --- a/include/linux/audit.h
> > +++ b/include/linux/audit.h
> > @@ -118,6 +118,34 @@ enum audit_nfcfgop {
> >         AUDIT_NFT_OP_INVALID,
> >  };
> >
> > +static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
> > +       [NFT_MSG_NEWTABLE]      = AUDIT_NFT_OP_TABLE_REGISTER,
> > +       [NFT_MSG_GETTABLE]      = AUDIT_NFT_OP_INVALID,
> > +       [NFT_MSG_DELTABLE]      = AUDIT_NFT_OP_TABLE_UNREGISTER,
> > +       [NFT_MSG_NEWCHAIN]      = AUDIT_NFT_OP_CHAIN_REGISTER,
> > +       [NFT_MSG_GETCHAIN]      = AUDIT_NFT_OP_INVALID,
> > +       [NFT_MSG_DELCHAIN]      = AUDIT_NFT_OP_CHAIN_UNREGISTER,
> > +       [NFT_MSG_NEWRULE]       = AUDIT_NFT_OP_RULE_REGISTER,
> > +       [NFT_MSG_GETRULE]       = AUDIT_NFT_OP_INVALID,
> > +       [NFT_MSG_DELRULE]       = AUDIT_NFT_OP_RULE_UNREGISTER,
> > +       [NFT_MSG_NEWSET]        = AUDIT_NFT_OP_SET_REGISTER,
> > +       [NFT_MSG_GETSET]        = AUDIT_NFT_OP_INVALID,
> > +       [NFT_MSG_DELSET]        = AUDIT_NFT_OP_SET_UNREGISTER,
> > +       [NFT_MSG_NEWSETELEM]    = AUDIT_NFT_OP_SETELEM_REGISTER,
> > +       [NFT_MSG_GETSETELEM]    = AUDIT_NFT_OP_INVALID,
> > +       [NFT_MSG_DELSETELEM]    = AUDIT_NFT_OP_SETELEM_UNREGISTER,
> > +       [NFT_MSG_NEWGEN]        = AUDIT_NFT_OP_GEN_REGISTER,
> > +       [NFT_MSG_GETGEN]        = AUDIT_NFT_OP_INVALID,
> > +       [NFT_MSG_TRACE]         = AUDIT_NFT_OP_INVALID,
> > +       [NFT_MSG_NEWOBJ]        = AUDIT_NFT_OP_OBJ_REGISTER,
> > +       [NFT_MSG_GETOBJ]        = AUDIT_NFT_OP_INVALID,
> > +       [NFT_MSG_DELOBJ]        = AUDIT_NFT_OP_OBJ_UNREGISTER,
> > +       [NFT_MSG_GETOBJ_RESET]  = AUDIT_NFT_OP_OBJ_RESET,
> > +       [NFT_MSG_NEWFLOWTABLE]  = AUDIT_NFT_OP_FLOWTABLE_REGISTER,
> > +       [NFT_MSG_GETFLOWTABLE]  = AUDIT_NFT_OP_INVALID,
> > +       [NFT_MSG_DELFLOWTABLE]  = AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
> > +};
> 
> The previously reported problem with this as a static still exists,
> correct?  It does seem like this should live in nf_tables_api.c
> doesn't it?

Yes.  Thank you.

> paul moore

- RGB

--
Richard Guy Briggs <rgb@redhat.com>
Sr. S/W Engineer, Kernel Security, Base Operating Systems
Remote, Ottawa, Red Hat Canada
IRC: rgb, SunRaycer
Voice: +1.647.777.2635, Internal: (81) 32635

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^ permalink raw reply	[flat|nested] 4+ messages in thread

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Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-03-23 20:04 [PATCH v3] audit: log nftables configuration change events once per table Richard Guy Briggs
2021-03-23 21:36 ` Florian Westphal
2021-03-24 16:32 ` Paul Moore
2021-03-25  3:15   ` Richard Guy Briggs

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