Debian Configuration :: Unable To Create Stat Exclude Rule For Auditd

I'm trying to configure auditd to monitor "strange" events with apache2 weberver on Wheezy (though same problem occurs on Jessie), tried both with "vanilla" 3.2 and backports 3.16 kernel I am actually using.

Here's auditd rules I have problem with:

Code: Select all-a exit,never -F arch=b64 -S stat -F path=/var/www/server-status -k web
-a exit,always -F arch=b64 -S stat -F uid=www-data -F success=0 -k web

So to recap, I want to log stat syscall failures for www-data user, but excluding some "known" issues, such as that "/var/www/server-status" (after a2enmod status, /server-status path can be accessed for statistics, though apache2 still tries to find physical file for that path and fails).

But the problem is.. excluding does not work.

Here's "auditctl -l" output:

Code: Select all# auditctl -l
LIST_RULES: exit,never arch=3221225534 (0xc000003e) watch=/var/www/server-status key=web syscall=stat
LIST_RULES: exit,always arch=3221225534 (0xc000003e) uid=33 (0x21) success=0 key=web syscall=stat

But when I execute:
Code: Select all# wget -O - http://localhost/server-status

audit.log appears:
Code: Select alltype=SYSCALL msg=audit(1461591557.077:365): arch=c000003e syscall=4 success=no exit=-2 a0=7f1bedab9358 a1=7ffef316ac20 a2=7ffef316ac20 a3=7f1bedab91f8 items=1 ppid=2398 pid=2451 auid=4294967295 uid=33 gid=33 euid=33 suid=33 fsuid=33 egid=33 sgid=33 fsgid=33 tty=(none) ses=4294967295 comm="apache2" exe="/usr/lib/apache2/mpm-prefork/apache2" key="web"
type=CWD msg=audit(1461591557.077:365):  cwd="/"
type=PATH msg=audit(1461591557.077:365): item=0 name="/var/www/server-status" nametype=UNKNOWN
type=UNKNOWN[1327] msg=audit(1461591557.077:365): proctitle=2F7573722F7362696E2F61706163686532002D6B007374617274

So, syscall=4 (stat) is still captured. Looks like "path" is known for auditd, but not excluded.

I've tried various rule combinations, for example simpler, more generic one:

Code: Select all-a exit,never -F path=/var/www/server-status

But it's the same.

Sadly man audit.rules and man auditctl does not have "exit,never" examples, only some (sometimes also similarly unsuccessfull) google results.

Could it be that Debian kernel does not support some audit features?