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audit: allow unlimited backlog queue

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Since audit can already be disabled by "audit=0" on the kernel boot line, or by
the command "auditctl -e 0", it would be more useful to have the
audit_backlog_limit set to zero mean effectively unlimited (limited only by
system RAM).

Acked-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Richard Guy Briggs 2013-10-22 13:28:49 -04:00 committed by Eric Paris
parent b6cfee4cce
commit 40c0775e5e
1 changed files with 4 additions and 2 deletions
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6
kernel/audit.c
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@ -101,7 +101,8 @@ static __u32 audit_nlk_portid;
* audit records being dropped. */
static int audit_rate_limit;
/* Number of outstanding audit_buffers allowed. */
/* Number of outstanding audit_buffers allowed.
* When set to zero, this means unlimited. */
static int audit_backlog_limit = 64;
#define AUDIT_BACKLOG_WAIT_TIME (60 * HZ)
static int audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME;
@ -375,7 +376,8 @@ static int audit_set_failure(int state)
static void audit_hold_skb(struct sk_buff *skb)
{
if (audit_default &&
skb_queue_len(&audit_skb_hold_queue) < audit_backlog_limit)
(!audit_backlog_limit ||
skb_queue_len(&audit_skb_hold_queue) < audit_backlog_limit))
skb_queue_tail(&audit_skb_hold_queue, skb);
else
kfree_skb(skb);