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From: Maksim Yevmenkin <emax@FreeBSD.org>
Date: Mon, 4 May 2009 20:48:07 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: RELENG_7
Subject: cvs commit: src/sys/kern uipc_sockbuf.c
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emax        2009-05-04 20:48:07 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7)
    sys/kern             uipc_sockbuf.c 
  Log:
  SVN rev 191796 on 2009-05-04 20:48:07Z by emax
  
  MFC r191366
  
  Fix sbappendrecord_locked().
  
  The main problem is that sbappendrecord_locked() relies on sbcompress()
  to set sb_mbtail. This will not happen if sbappendrecord_locked() is
  called with mbuf chain made of exactly one mbuf (i.e. m0->m_next == NULL).
  In this case sbcompress() will be called with m == NULL and will do
  nothing. I'm not entirely sure if m == NULL is a valid argument for
  sbcompress(), and, it rather pointless to call it like that, but keep
  calling it so it can do SBLASTMBUFCHK().
  
  PR:                     kern/126742
  Investigated by:        pluknet < pluknet -at- gmail -dot- com >
  No response from:       freebsd-current@, freebsd-bluetooth@
  
  Revision   Changes    Path
  1.171.2.5  +2 -8      src/sys/kern/uipc_sockbuf.c