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| author | Paul Moore <paul@paul-moore.com> | 2016-11-29 16:53:26 -0500 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2016-12-14 13:06:04 -0500 |
| commit | 6c54e7899693dee3db67ea996e9be0e10f67920f (patch) | |
| tree | da2218357864e7fcb1e111d913e27d5b3c5f3bed /kernel/audit.c | |
| parent | e1d166212894d9d959a601c4802882b877bb420a (diff) | |
| download | linux-6c54e7899693dee3db67ea996e9be0e10f67920f.tar.gz linux-6c54e7899693dee3db67ea996e9be0e10f67920f.tar.bz2 linux-6c54e7899693dee3db67ea996e9be0e10f67920f.zip | |
audit: handle a clean auditd shutdown with grace
When auditd stops cleanly it sets 'auditd_pid' to 0 with an
AUDIT_SET message, in this case we should reset our backlog
queues via the auditd_reset() function. This patch also adds
a 'auditd_pid' check to the top of kauditd_send_unicast_skb()
so we can fail quicker.
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'kernel/audit.c')
| -rw-r--r-- | kernel/audit.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index 0572e5dcfda7..b447a6b1fdc8 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -468,6 +468,10 @@ static int kauditd_send_unicast_skb(struct sk_buff *skb) { int rc; + /* if we know nothing is connected, don't even try the netlink call */ + if (!audit_pid) + return -ECONNREFUSED; + /* get an extra skb reference in case we fail to send */ skb_get(skb); rc = netlink_unicast(audit_sock, skb, audit_nlk_portid, 0); @@ -1009,6 +1013,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) audit_pid = new_pid; audit_nlk_portid = NETLINK_CB(skb).portid; audit_sock = skb->sk; + if (!new_pid) + auditd_reset(); wake_up_interruptible(&kauditd_wait); } if (s.mask & AUDIT_STATUS_RATE_LIMIT) { |