[Bug 209475] pf didn't check if enough free RAM for net.pf.states_hashsize

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209475

--- Comment #34 from commit-hook at freebsd.org ---
A commit references this bug:

Author: kp
Date: Sun Mar 18 11:26:07 UTC 2018
New revision: 331117
URL: https://svnweb.freebsd.org/changeset/base/331117

Log:
  MFC r329950:

  pf: Cope with overly large net.pf.states_hashsize

  If the user configures a states_hashsize or source_nodes_hashsize value we
may
  not have enough memory to allocate this. This used to lock up pf, because
these
  allocations used M_WAITOK.

  Cope with this by attempting the allocation with M_NOWAIT and falling back to
  the default sizes (with M_WAITOK) if these fail.

  PR:           209475
  Submitted by: Fehmi Noyan Isi <fnoyanisi AT yahoo.com>

Changes:
_U  stable/10/
  stable/10/sys/net/pfvar.h
  stable/10/sys/netpfil/pf/pf.c

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