Re: OPENBSD_2_9 (SEMMNI, SEMMNS, SHMMAXPGS): httpd Memory fault(core dumped)

["Alexander Farber (EED)" <eedalf_(_at_)_eed_(_dot_)_ericsson_(_dot_)_se>]

Thanks Heikki,

Heikki Korpela wrote:
> On Wed, 4 Jul 2001, Alexander Farber (EED) wrote:
> 
> > So, there is a problem with httpd in OPENBSD_2_9, when
> > the ServerName is unset in /var/www/conf/httpd.conf.
> 
> This is fixed in Apache 1.3.20.
> 
>    http://httpd.apache.org/dist/httpd/CHANGES_1.3
> 
>   *) Fix a possible NULL pointer dereference in the detection of the
>      default ServerName or IP string (introduced in 1.3.18).
>      [Ignasi Roca, <Ignasi_(_dot_)_Roca_(_at_)_fujitsu-siemens_(_dot_)_com>]
> 
> Try this patch:
> 
> --
> <---------------------------------------------------------------------->
>                    Heikki Korpela -- heko_(_at_)_saitti_(_dot_)_net
> 
> Index: src/main/util.c
> ===================================================================
> RCS file: /usr/cvs/src/usr.sbin/httpd/src/main/util.c,v
> retrieving revision 1.9
> retrieving revision 1.10
> diff -u -r1.9 -r1.10
> --- src/main/util.c     2001/03/29 10:21:43     1.9
> +++ src/main/util.c     2001/05/03 17:16:12     1.10
> @@ -2047,12 +2047,16 @@
>          str[sizeof(str) - 1] = '\0';
>          if ((!(p = gethostbyname(str)))
>              || (!(server_hostname = find_fqdn(a, p)))) {
> -            /* Recovery - return the default servername by IP: */
> -            if (p->h_addr_list[0]) {
> -                ap_snprintf(str, sizeof(str), "%pA", p->h_addr_list[0]);
> -               server_hostname = ap_pstrdup(a, str);
> -                /* We will drop through to report the IP-named server */
> -            }
> +           if (!p)
> +              server_hostname=NULL;
> +           else {
> +              /* Recovery - return the default servername by IP: */
> +              if (p->h_addr_list[0]) {
> +                     ap_snprintf(str, sizeof(str), "%pA", p->h_addr_list[0]);
> +                     server_hostname = ap_pstrdup(a, str);
> +                    /* We will drop through to report the IP-named server */
> +             }
> +          }
>          }
>         else
>              /* Since we found a fdqn, return it with no logged message. */

I've just applied it (to the httpd from OPENBSD_2_9) and it works -
the Apache doesn't dump core even if the ServerName is missing.

Regards
Alex

PS: It's really cool to have an own server - my 
    "baby" is hanging at http://pref.dyndns.org :-)