From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Grubb Subject: Re: proposing [PATCH] audit: get rid of *NO* daemon at audit_pid=0 message Date: Mon, 11 Nov 2013 14:20:25 -0500 Message-ID: <8662552.afS8akzYV8@x2> References: <20131029230500.GC15011@mguzik.redhat.com> <1384190493.2938.58.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1384190493.2938.58.camel@localhost> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-audit-bounces@redhat.com Errors-To: linux-audit-bounces@redhat.com To: linux-audit@redhat.com Cc: rgb@redhat.com, Mateusz Guzik List-Id: linux-audit@redhat.com On Monday, November 11, 2013 12:21:33 PM Eric Paris wrote: > On Wed, 2013-10-30 at 00:05 +0100, Mateusz Guzik wrote: > > Hello, > > > > I wrote a trivial patch for what I believe is a subsystem you maintain. > > > > I'm sending it privately first to ensure it looks ok at has proper > > recipients (I'm new to linux world, sorry :>). > > > > 'To' would be: linux-audit@redhat.com > > > > The rest is: > > > > From: Mateusz Guzik > > Date: Tue, 29 Oct 2013 23:51:52 +0100 > > Subject: [PATCH] audit: get rid of *NO* daemon at audit_pid=0 message > > > > kauditd_send_skb is called after audit_pid was checked to be non-zero. > > > > However, it can be set to 0 due to auditd exiting while kauditd_send_skb > > is still executed and this can result in a spurious warning about missing > > auditd. Is it really spurious? Meaning an admin at a site making heavy use of the audit subsystem would never want to know this? Are the events always put back with no chance of loss? -Steve > > Re-check audit_pid before printing the message. > > > > Signed-off-by: Mateusz Guzik > > Cc: Eric Paris > > Cc: linux-kernel@vger.kernel.org > > Acked-by: Eric Paris > > > --- > > > > kernel/audit.c | 8 +++++--- > > 1 file changed, 5 insertions(+), 3 deletions(-) > > > > diff --git a/kernel/audit.c b/kernel/audit.c > > index 7b0e23a..a91a965 100644 > > --- a/kernel/audit.c > > +++ b/kernel/audit.c > > @@ -388,9 +388,11 @@ static void kauditd_send_skb(struct sk_buff *skb) > > > > err = netlink_unicast(audit_sock, skb, audit_nlk_portid, 0); > > if (err < 0) { > > > > BUG_ON(err != -ECONNREFUSED); /* Shouldn't happen */ > > > > - printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n", audit_pid); > > - audit_log_lost("auditd disappeared\n"); > > - audit_pid = 0; > > + if (audit_pid) { > > + printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n", audit_pid); > > + audit_log_lost("auditd disappeared\n"); > > + audit_pid = 0; > > + } > > > > /* we might get lucky and get this in the next auditd */ > > audit_hold_skb(skb); > > > > } else > > -- > Linux-audit mailing list > Linux-audit@redhat.com > https://www.redhat.com/mailman/listinfo/linux-audit