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authorRichard Guy Briggs <rgb@redhat.com>2019-01-18 17:42:48 -0500
committerPaul Moore <paul@paul-moore.com>2019-01-18 17:53:29 -0500
commit626abcd13d4ea2b67be3249a250046cf713f532a (patch)
tree750412eb20cc016e7312d66a696be0af4b5130fc /kernel/audit.c
parent9e36a5d49c3a6fc4a2e0ba2dc11b27c4a8ae6303 (diff)
audit: add syscall information to CONFIG_CHANGE records
Tie syscall information to all CONFIG_CHANGE calls since they are all a result of user actions. Exclude user records from syscall context: Since the function audit_log_common_recv_msg() is shared by a number of AUDIT_CONFIG_CHANGE and the entire range of AUDIT_USER_* record types, and since the AUDIT_CONFIG_CHANGE message type has been converted to a syscall accompanied record type, special-case the AUDIT_USER_* range of messages so they remain standalone records. See: https://github.com/linux-audit/audit-kernel/issues/59 See: https://github.com/linux-audit/audit-kernel/issues/50 Signed-off-by: Richard Guy Briggs <rgb@redhat.com> [PM: fix line lengths in kernel/audit.c] Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'kernel/audit.c')
-rw-r--r--kernel/audit.c28
1 files changed, 19 insertions, 9 deletions
diff --git a/kernel/audit.c b/kernel/audit.c
index d412fb4ae6d5..c2a7662cc254 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -396,7 +396,7 @@ static int audit_log_config_change(char *function_name, u32 new, u32 old,
struct audit_buffer *ab;
int rc = 0;
- ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
+ ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_CONFIG_CHANGE);
if (unlikely(!ab))
return rc;
audit_log_format(ab, "op=set %s=%u old=%u ", function_name, new, old);
@@ -1053,7 +1053,8 @@ static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type)
return err;
}
-static void audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type)
+static void audit_log_common_recv_msg(struct audit_context *context,
+ struct audit_buffer **ab, u16 msg_type)
{
uid_t uid = from_kuid(&init_user_ns, current_uid());
pid_t pid = task_tgid_nr(current);
@@ -1063,7 +1064,7 @@ static void audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type)
return;
}
- *ab = audit_log_start(NULL, GFP_KERNEL, msg_type);
+ *ab = audit_log_start(context, GFP_KERNEL, msg_type);
if (unlikely(!*ab))
return;
audit_log_format(*ab, "pid=%d uid=%u ", pid, uid);
@@ -1071,6 +1072,12 @@ static void audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type)
audit_log_task_context(*ab);
}
+static inline void audit_log_user_recv_msg(struct audit_buffer **ab,
+ u16 msg_type)
+{
+ audit_log_common_recv_msg(NULL, ab, msg_type);
+}
+
int is_audit_feature_set(int i)
{
return af.features & AUDIT_FEATURE_TO_MASK(i);
@@ -1338,7 +1345,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (err)
break;
}
- audit_log_common_recv_msg(&ab, msg_type);
+ audit_log_user_recv_msg(&ab, msg_type);
if (msg_type != AUDIT_USER_TTY)
audit_log_format(ab, " msg='%.*s'",
AUDIT_MESSAGE_TEXT_MAX,
@@ -1361,7 +1368,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (nlmsg_len(nlh) < sizeof(struct audit_rule_data))
return -EINVAL;
if (audit_enabled == AUDIT_LOCKED) {
- audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
+ audit_log_common_recv_msg(audit_context(), &ab,
+ AUDIT_CONFIG_CHANGE);
audit_log_format(ab, " op=%s audit_enabled=%d res=0",
msg_type == AUDIT_ADD_RULE ?
"add_rule" : "remove_rule",
@@ -1376,7 +1384,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
break;
case AUDIT_TRIM:
audit_trim_trees();
- audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
+ audit_log_common_recv_msg(audit_context(), &ab,
+ AUDIT_CONFIG_CHANGE);
audit_log_format(ab, " op=trim res=1");
audit_log_end(ab);
break;
@@ -1406,8 +1415,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
/* OK, here comes... */
err = audit_tag_tree(old, new);
- audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
-
+ audit_log_common_recv_msg(audit_context(), &ab,
+ AUDIT_CONFIG_CHANGE);
audit_log_format(ab, " op=make_equiv old=");
audit_log_untrustedstring(ab, old);
audit_log_format(ab, " new=");
@@ -1474,7 +1483,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
old.enabled = t & AUDIT_TTY_ENABLE;
old.log_passwd = !!(t & AUDIT_TTY_LOG_PASSWD);
- audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
+ audit_log_common_recv_msg(audit_context(), &ab,
+ AUDIT_CONFIG_CHANGE);
audit_log_format(ab, " op=tty_set old-enabled=%d new-enabled=%d"
" old-log_passwd=%d new-log_passwd=%d res=%d",
old.enabled, s.enabled, old.log_passwd,

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