Date: Tue, 20 Jul 1999 17:42:31 +0200 (SAT) From: Reinier Bezuidenhout <rbezuide@oskar.nanoteq.co.za> To: freebsd-hackers@freebsd.org Subject: if_dl.h in stable causes sendmail segmentation Message-ID: <199907201542.RAA02634@oskar.nanoteq.co.za>
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Hi ...
I have the following situation...
A machine running a 3.2-STABLE of a few weeks ago ...
When the machine booted I saw that newaliases (sendmail -bi)
exited with a segmentation fault.
I further inspected and found that if I do a ifconfig of a interface
(fxp0 or de0) newaliases is ok, but when I do an ifconfig fxp0 delete
the newaliases exits on a segmentation fault.
e.g.
---------------------
Amnesiac# ifconfig -au
de0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 196.37.91.253 netmask 0xffffff00 broadcast 196.37.91.255
ether 00:e0:29:00:e5:19
media: autoselect (10baseT/UTP) status: active
supported media: autoselect 100baseTX <full-duplex> 100baseTX 10baseT/UTP <full-duplex> 10baseT/UTP
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet 127.0.0.1 netmask 0xff000000
Amnesiac# newaliases
/etc/aliases: 19 aliases, longest 10 bytes, 190 bytes total
Amnesiac# ifconfig de0 delete
Amnesiac# newaliases
Segmentation fault
Amnesiac# ifconfig de0 up
Amnesiac# newaliases
/etc/aliases: 19 aliases, longest 10 bytes, 190 bytes total
Amnesiac#
----------------------
I then used the kernel sources from a few weeks after the 3.2-RELEASE
and compiled the kernel - now everything works ok ... no segmentation
fault.
I eventually traced the problem down to the following header file
/usr/src/sys/net/if_dl.h
If I use the old header file ... no problem ... use the latest one ..
sendmail crashes (and looks like gated also does this). Here is the diff
jarrow# diff -c if_dl.h ../../sys.new/net/if_dl.h
*** if_dl.h Tue Jul 20 16:18:54 1999
--- ../../sys.new/net/if_dl.h Thu May 27 05:06:41 1999
***************
*** 31,37 ****
* SUCH DAMAGE.
*
* @(#)if_dl.h 8.1 (Berkeley) 6/10/93
! * $Id: if_dl.h,v 1.6 1997/02/22 09:41:00 peter Exp $
*/
#ifndef _NET_IF_DL_H_
--- 31,37 ----
* SUCH DAMAGE.
*
* @(#)if_dl.h 8.1 (Berkeley) 6/10/93
! * $Id: if_dl.h,v 1.6.4.1 1999/05/27 03:06:41 julian Exp $
*/
#ifndef _NET_IF_DL_H_
***************
*** 68,73 ****
--- 68,75 ----
u_char sdl_slen; /* link layer selector length */
char sdl_data[12]; /* minimum work area, can be larger;
contains both if name and ll address */
+ u_short sdl_rcf; /* source routing control */
+ u_short sdl_route[16]; /* source routing information */
};
#define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen))
----------------------
Looks like the addition of the two last entries in the structure is the
problem ?? Any ideas ??
Sendmail crashes in the routine in conf.c called "load_if_names()"
where it cycles through the interfaces round line 4444
if (sa->sa.sa_len > sizeof ifr->ifr_addr)
the address sa->sa seems to point so where
If you want any more info .. just ask :)
Thanx
Reinier
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