[Bug 213859] /dev/pf device busy causes issues in complex systems

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213859

            Bug ID: 213859
           Summary: /dev/pf device busy causes issues in complex systems
           Product: Base System
           Version: 10.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: jjasen at gmail.com
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

Probably filed under pf:

I have firewall systems using pf, with ftp_proxy as well. Under certain
circumstances, relayd will crash when updating a table if something else (such
as ftp_proxy, tftp_proxy, or a local rules edit) has /dev/pf locked.

I've seen other cases, where an individual ftp_proxy will also fail, if
something else grabbed /dev/pf as well -- and seeing "pfctl: DIOCADDRULE:
Device busy " failures when doing manual updates is quite common.

relayd logs attached:
Oct 28 17:26:15 fw-1/fw-1 relayd[31847]: table devproxy-http: 1 added, 0
deleted, 0 changed, 2 killed 
Oct 28 17:26:15 fw-1/fw-1 relayd[31847]: fatal: sync_ruleset: cannot add
address to pool: Device busy 
Oct 28 17:26:15 fw-1/fw-1 kernel: Oct 28 17:26:15 pubgw2 relayd[31847]: fatal:
sync_ruleset: cannot add address to pool: Device busy 
Oct 28 17:26:15 fw-1/fw-1 relayd[31848]: hce exiting, pid 31848
Oct 28 17:26:15 fw-1/fw-1 relayd[31849]: relay exiting, pid 31849
Oct 28 17:26:15 fw-1/fw-1 relayd[31851]: relay exiting, pid 31851
Oct 28 17:26:15 fw-1/fw-1 relayd[31852]: relay exiting, pid 31852
Oct 28 17:26:15 fw-1/fw-1 relayd[31854]: ca exiting, pid 31854
Oct 28 17:26:15 fw-1/fw-1 relayd[31853]: ca exiting, pid 31853
Oct 28 17:26:15 fw-1/fw-1 relayd[31850]: ca exiting, pid 31850
Oct 28 17:26:25 fw-1/fw-1 relayd[31846]: lost child: pfe exited abnormally 
Oct 28 17:26:25 fw-1/fw-1 kernel: Oct 28 17:26:25 pubgw2 relayd[31846]: lost
child: pfe exited abnormally
Oct 28 17:26:25 fw-1/fw-1 relayd[31846]: parent terminating, pid 31846

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