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netfilter: create audit records for x_tables replaces 

The setsockopt() syscall to replace tables is already recorded
in the audit logs. This patch stores additional information
such as table name and netfilter protocol.

Cc: Patrick McHardy <kaber@trash.net>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Thomas Graf <tgraf@redhat.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Thomas Graf 2011-01-16 18:12:59 +01:00 committed by Patrick McHardy
parent 43f393caec
commit fbabf31e4d
2 changed files with 17 additions and 0 deletions
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1
include/linux/audit.h
View File

@ -104,6 +104,7 @@
#define AUDIT_CAPSET 1322 /* Record showing argument to sys_capset */
#define AUDIT_MMAP 1323 /* Record showing descriptor and flags in mmap */
#define AUDIT_NETFILTER_PKT 1324 /* Packets traversing netfilter chains */
#define AUDIT_NETFILTER_CFG 1325 /* Netfilter chain modifications */
#define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
#define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */

16
net/netfilter/x_tables.c
View File

@ -23,6 +23,7 @@
#include <linux/mutex.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/audit.h>
#include <net/net_namespace.h>
#include <linux/netfilter/x_tables.h>
@ -834,6 +835,21 @@ xt_replace_table(struct xt_table *table,
*/
local_bh_enable();
#ifdef CONFIG_AUDIT
if (audit_enabled) {
struct audit_buffer *ab;
ab = audit_log_start(current->audit_context, GFP_KERNEL,
AUDIT_NETFILTER_CFG);
if (ab) {
audit_log_format(ab, "table=%s family=%u entries=%u",
table->name, table->af,
private->number);
audit_log_end(ab);
}
}
#endif
return private;
}
EXPORT_SYMBOL_GPL(xt_replace_table);