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From: Brooks Davis <brooks@FreeBSD.org>
Date: Fri, 29 Sep 2006 03:07:41 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: RELENG_6
Cc: 
Subject: cvs commit: src/sbin/dhclient bpf.c
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brooks      2006-09-29 03:07:41 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sbin/dhclient        bpf.c 
  Log:
  MFC rev 1.7
  
    It is possible for bpf to return a length such that:
  
           length != BPF_WORDALIGN(length)
  
    This meeans that it is possible for this to be true:
  
           interface->rbuf_offset > interface->rbuf_len
  
    Handle this case in the test for running out of packets.  While
    OpenBSD's solution of setting interface->rbuf_len to
    BPF_WORDALIGN(length) is safe due to the size of the buffer, I think
    this solution results in less hidden assumptions.
  
    This should fix the problem of dhclient running away and consuming 100%
    CPU.
  
  PR:             bin/102226
  Submitted by:   Joost Bekkers <joost at jodocus.org>
  Approved by:    re (ken)
  
  Revision  Changes    Path
  1.2.2.4   +1 -1      src/sbin/dhclient/bpf.c