git: userland - dhclient - Fix possible infinite loop

Samuel Greear sjg at
Wed Sep 8 18:23:42 PDT 2010

commit db2a08265dc67538d417f14ccdc9fdef6fb0d60b
Author: Samuel J. Greear <sjg at>
Date:   Thu Sep 9 01:12:31 2010 +0000

    userland - dhclient - Fix possible infinite loop
    FreeBSD commit message:
    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%
    PR:		bin/102226
    Submitted by:	Joost Bekkers <joost at>
    Reported-by:	Many
    Obtained-from:	FreeBSD

Summary of changes:
 sbin/dhclient/bpf.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

DragonFly BSD source repository

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