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From: Sam Leffler <sam@FreeBSD.org>
Date: Thu, 6 Nov 2003 17:47:53 -0800 (PST)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
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Subject: cvs commit: src/sys/netinet ip_input.c
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sam         2003/11/06 17:47:53 PST

  FreeBSD src repository

  Modified files:
    sys/netinet          ip_input.c 
  Log:
  Fix locking of the ip forwarding cache.  We were holding a reference
  to a routing table entry w/o bumping the reference count or locking
  against the entry being free'd.  This caused major havoc (for some
  reason it appeared most frequently for folks running natd).  Fix
  is to bump the reference count whenever we copy the route cache
  contents into a private copy so the entry cannot be reclaimed out
  from under us.  This is a short term fix as the forthcoming routing
  table changes will eliminate this cache entirely.
  
  Supported by:   FreeBSD Foundation
  
  Revision  Changes    Path
  1.250     +21 -11    src/sys/netinet/ip_input.c