cvs commit: src/sys/netinet6 udp6_usrreq.c

[Robert Watson]

rwatson     2008-09-23 21:29:22 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7)
    sys/netinet6         udp6_usrreq.c 
  Log:
  SVN rev 183316 on 2008-09-23 21:29:22Z by rwatson
  
  Merge r183265 from head to stable/7:
  
    When invoking the udp_send() from udp6_send() due to use of a v6-mapped
    IPv4 address, first drop the udbinfo and inpcb locks, which will otherwise
    be recursed.  This leads to a potential minor race, but is preferable to a
    deadlock when acquiring a read lock after a write lock on the inpcb.
  
    MFC after:    3 days
    Reported by:  Norbert Papke <fbsd-ml at scrapper.ca>, lioux
  
  Approved by:    re (kib)
  Tested by:      Norbert Papke <fbsd-ml at scrapper.ca>, lioux
  
  Revision  Changes    Path
  1.81.2.8  +13 -3     src/sys/netinet6/udp6_usrreq.c