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From: "Bjoern A. Zeeb" <bz@FreeBSD.org>
Date: Sat, 9 Apr 2011 12:11:19 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: RELENG_8
Subject: cvs commit: src/sys/netinet6 nd6_nbr.c
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bz          2011-04-09 12:11:19 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_8)
    sys/netinet6         nd6_nbr.c 
  Log:
  SVN rev 220487 on 2011-04-09 12:11:19Z by bz
  
  MFC r219562:
  
    Make sure the locally cached value of rt->rt_gateway stays stable,
    even after dropping the reference and unlocking. Previously we
    have dereferenced a NULL pointer (after r121765).
    Simply unlocking after the block does not work either because of
    lock ordering (see r121765) and in addition we would still hold
    a pointer to something that might be gone by the time we access it.
    Thus take a copy of the value rather than just caching the pointer.
  
    Submitted by: chenyl (netstar2008 126.com) (initial version)
  PR:             kern/151908
  
  Revision  Changes    Path
  1.69.2.6  +14 -7     src/sys/netinet6/nd6_nbr.c