Failed attempts to change the audit_pid configuration are not presently logged. One case is an attempt to starve an old auditd by starting up a new auditd when the old one is still alive and active. The other case is an attempt to orphan a new auditd when an old auditd shuts down.
Log both as AUDIT_CONFIG_CHANGE messages with failure result. Signed-off-by: Richard Guy Briggs <[email protected]> --- kernel/audit.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/kernel/audit.c b/kernel/audit.c index 3399ab2..65dcd45 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -883,12 +883,16 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) pid_t requesting_pid = task_tgid_vnr(current); u32 portid = NETLINK_CB(skb).portid; - if ((!new_pid) && (requesting_pid != audit_pid)) + if ((!new_pid) && (requesting_pid != audit_pid)) { + audit_log_config_change("audit_pid", new_pid, audit_pid, 0); return -EACCES; + } if (audit_pid && new_pid && audit_ping(requesting_pid, nlmsg_hdr(skb)->nlmsg_seq, portid) != - -ECONNREFUSED) + -ECONNREFUSED) { + audit_log_config_change("audit_pid", new_pid, audit_pid, 0); return -EEXIST; + } if (audit_enabled != AUDIT_OFF) audit_log_config_change("audit_pid", new_pid, audit_pid, 1); audit_pid = new_pid; -- 1.7.1 -- Linux-audit mailing list [email protected] https://www.redhat.com/mailman/listinfo/linux-audit
