Re: freebsd-security Digest, Vol 184, Issue 2

Quoting Wes Peters <wes@xxxxxxxxxxxx> (from Tue, 7 Nov 2006 23:28:15 -0800):


On Nov 7, 2006, at 11:22 PM, Alexander Leidinger wrote:

Quoting Wes Peters <wes@xxxxxxxxxxxx> (from Tue, 7 Nov 2006 20:19:40 -0800):

--- /etc/rc.d/dmesg Sat May 6 21:00:26 2006
+++ dmesg Tue Nov 7 20:17:47 2006
@@ -19,8 +19,10 @@
do_dmesg()
{
- rm -f ${dmesg_file}
+ mv -f ${dmesg_file} ${dmesg_file}.prev
( umask 022 ; /sbin/dmesg $rc_flags > ${dmesg_file} )
+ cmp -s ${dmesg_file} ${dmesg_file}.prev || \
+ logger -p security.warn 'dmesg.boot changed from
previous boot'
}
load_rc_config $name


If you like that, I'm willing to discuss it further, and/or commit it
and let the howling tell if it's a keeper or not. ;^)

Did you try this? I didn't, but I would expect to see this message _every time_ (because of minor timecounter rate changes).

Yes, but only once, and then forced a change by re-running it. Maybe I
just got 'lucky.' Feel free to suggest 'better' tests, or parts to
throw out of dmesg.boot before the test.

The ACPI-fast, ACPI-safe, TSC and i8xxx timecounter frequency needs to be removed IMO. Sometimes I also see a very small change in the probe order... but I don't remember exacly what's changing and what's causing it.

Bye,
Alexander.

--
The days are all empty and the nights are unreal.

http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7
http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137
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Relevant Pages

  • Re: freebsd-security Digest, Vol 184, Issue 2
    ... previous boot' ... If you like that, I'm willing to discuss it further, and/or commit it ... and let the howling tell if it's a keeper or not. ... and what am I doing in this handbasket? ...
    (FreeBSD-Security)
  • Re: freebsd-security Digest, Vol 184, Issue 2
    ... previous boot' ... If you like that, I'm willing to discuss it further, and/or commit it ... and let the howling tell if it's a keeper or not. ... my advice. ...
    (FreeBSD-Security)