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Posted to dev@httpd.apache.org by Rob Hartill <ro...@imdb.com> on 1996/09/05 12:04:31 UTC
SIGSEGV... (fwd)
not acked
----- Forwarded message from =?ISO-8859-1?Q?Sami_J=2E_M=E4kinen?= -----
Date: Thu, 5 Sep 1996 12:49:53 +0300 (EET DST)
From: =?ISO-8859-1?Q?Sami_J=2E_M=E4kinen?= <sj...@adm.alexpress.fi>
To: Apache-bugs@apache.org
Subject: SIGSEGV...
Message-ID: <Pi...@pasta.alexpress.fi>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Hello, I am using Apache 1.1.1 happily, but I just encountered
a really weird problem with the proxy module.
My environment:
SunOS lasagne 5.5 Generic_103093-03 sun4m sparc SUNW,SPARCstation-20
Status of processor 0 as of: 09/05/96 11:22:18
Processor has been on-line since 08/10/96 15:02:25.
The sparc processor operates at 75 MHz,
and has a sparc floating point processor.
Status of processor 2 as of: 09/05/96 11:22:18
Processor has been on-line since 08/10/96 15:02:28.
The sparc processor operates at 75 MHz,
and has a sparc floating point processor.
gcc version 2.7.2
Apache 1.1.1, my Configuration:
--- 8< ---
CC= gcc -pipe
CFLAGS= -g -DSTATUS
LFLAGS= -g
AUX_CFLAGS= -DSOLARIS2
AUX_LIBS= -lsocket -lnsl
Module mime_module mod_mime.o
Module access_module mod_access.o
Module auth_module mod_auth.o
Module negotiation_module mod_negotiation.o
Module includes_module mod_include.o
Module dir_module mod_dir.o
Module cgi_module mod_cgi.o
Module userdir_module mod_userdir.o
Module alias_module mod_alias.o
Module env_module mod_env.o
Module common_log_module mod_log_common.o
Module asis_module mod_asis.o
Module imap_module mod_imap.o
Module action_module mod_actions.o
Module status_module mod_status.o
Module info_module mod_info.o
Module dbm_auth_module mod_auth_dbm.o
Module proxy_module mod_proxy.o
--- 8< ---
I put the following into httpd.conf:
--- 8< ---
ServerType standalone
Port 80
User nobody
Group nobody
ServerRoot /opt/www
PidFile httpd.pid
ScoreBoardFile runtime_status
TransferLog access_log
ErrorLog error_log
HostnameLookups Off
ProxyRequests Off
# CacheNegotiatedDocs
Timeout 1800
MinSpareServers 16
MaxSpareServers 32
StartServers 16
MaxClients 128
MaxRequestsPerChild 32
<Virtualhost kauppalehti.fi>
ServerName kauppalehti.fi
ServerAlias kauppalehti.fi www.kauppalehti.fi
ServerAdmin webmaster@kauppalehti.fi
DocumentRoot /opt/www/kauppalehti/html
ErrorLog kauppalehti/logs/error_log
TransferLog kauppalehti/logs/access_log
# AgentLog kauppalehti/logs/agent_log
DirectoryIndex index.shtml index.html index.htm index.cgi
FancyIndexing on
UserDir public_html
AccessFileName .htaccess
DefaultType text/plain
<Directory /opt/www/kauppalehti/html>
Options Indexes FollowSymLinks Includes ExecCGI
AllowOverride All
</Directory>
<Directory /opt/www/kauppalehti/cgi-bin>
Options Indexes FollowSymLinks
</Directory>
<Directory /opt/www/kauppalehti/stock/cgi-bin>
Options Indexes FollowSymLinks
</Directory>
<Directory /opt/www/kauppalehti/cgi-adm>
Options Indexes FollowSymLinks
</Directory>
<Directory /opt/www/kauppalehti/cgi-beta>
Options Indexes FollowSymLinks
</Directory>
Alias /icons/ /opt/www/icons/
Alias /cicons/ /opt/www/kauppalehti/stock/cicons/
ScriptAlias /cgi-bin/ /opt/www/kauppalehti/cgi-bin/
ScriptAlias /cgi-adm/ /opt/www/kauppalehti/cgi-adm/
ScriptAlias /cgi/ /opt/www/kauppalehti/stock/cgi-bin/
ScriptAlias /cgi-beta/ /opt/www/kauppalehti/cgi-beta/
<Location /ad>
AuthType Basic
AuthName Kauppalehti Online
AuthDBMUserFile /opt/www/kauppalehti/userdb/kl-passwd
AuthDBMGroupFile /dev/null
<Limit GET POST>
require valid-user
</Limit>
Redirect /ad/urval/ http://kauppalehti.fi/yhteistyo/mercuri-urval/
Redirect /ad/tietovoima/ http://www.tietovoima.fi/
Redirect /ad/volvo/ http://www.volvo.fi/
Redirect /ad/renault/ http://www.renault.fi/
Redirect /ad/aamulehti/ http://www.aamulehti.fi/
Redirect /ad/iltalehti/ http://www.iltalehti.fi/
Redirect /ad/hartwall/ http://www.hartwall.fi/vuosikertomus95/
Redirect /ad/finnair/ http://www.finnair.fi/facts.htm
Redirect /ad/virtuaalimessut/ http://virtuaalimessut.kolumbus.fi/
Redirect /ad/kmbozell/ http://www.kmbozell.fi/kmbhaku.html
Redirect /ad/finnair/ http://www.finnair.fi/
</Location>
Redirect /yhteistyo/tietovoima/ http://www.tietovoima.fi/
# ErrorDocument 404 /huolto.html
ErrorDocument 401 /ei_salasanaa.html
ErrorDocument 403 /forbidden.html
</VirtualHost>
# three other virtual hosts deleted to save space
<Virtualhost netra2.alexpress.fi>
ServerName netra2.alexpress.fi
ServerAlias netra2.alexpress.fi lasagne.alexpress.fi
ServerAdmin webmaster@alexpress.fi
DocumentRoot /opt/www/netra2/html
ErrorLog netra2/logs/error_log
TransferLog netra2/logs/access_log
# AgentLog netra2/logs/agent_log
DirectoryIndex index.shtml index.html index.htm
FancyIndexing on
UserDir public_html
AccessFileName .htaccess
DefaultType text/plain
<Directory /opt/www/netra2/html>
Options Indexes FollowSymLinks Includes ExecCGI
AllowOverride All
</Directory>
<Directory /opt/www/netra2/cgi-bin>
Options Indexes FollowSymLinks
</Directory>
<Location /info>
SetHandler server-info
<Limit GET POST>
order deny,allow
deny from all
allow from 194.215.204 194.215.205 194.215.81
allow from 193.211.48 193.211.49 193.211.50
</Limit>
</Location>
<Location /status>
SetHandler server-status
<Limit GET POST>
order deny,allow
deny from all
allow from 194.215.204 194.215.205 194.215.81
allow from 193.211.48 193.211.49 193.211.50
</Limit>
</Location>
ProxyPass /proxy http://rs1.alexpress.fi
Alias /icons/ /opt/www/icons/
ScriptAlias /cgi-bin/ /opt/www/netra2/cgi-bin/
</VirtualHost>
--- 8< ---
When I try to access the URL http://netra2.alexpress.fi/proxy/,
I get a "no data" dialog and error_log says
[Thu Sep 5 11:43:41 1996] httpd: caught SIGSEGV, dumping core
I checked the rs1.alexpress.fi access_log and it had serviced the request.
gdb says:
GDB is free software and you are welcome to distribute copies of it
under certain conditions; type "show copying" to see the conditions.
There is absolutely no warranty for GDB; type "show warranty" for details.
GDB 4.16 (sparc-sun-solaris2.5.1),
Copyright 1996 Free Software Foundation, Inc...
Core was generated by `/opt/www/bin/httpd -d /opt/www'.
Program terminated with signal 6, Aborted.
#0 0xef6b3e30 in kill ()
(gdb) bt
#0 0xef6b3e30 in kill ()
#1 0xef679608 in abort ()
#2 0x1a220 in seg_fault () at http_main.c:939
#3 <signal handler called>
#4 0xef662e2c in strlen ()
#5 0x4d874 in http_handler (r=0x871d0, c=0x6e888, url=0x6e885 "/",
proxyhost=0x0, proxyport=0) at mod_proxy.c:2942
#6 0x4ad34 in proxy_handler (r=0x871d0) at mod_proxy.c:2174
#7 0x1eb3c in invoke_handler (r=0x871d0) at http_config.c:282
#8 0x21d64 in process_request_internal (r=0x871d0) at http_request.c:768
#9 0x21da4 in process_request (r=0x871d0) at http_request.c:777
#10 0x1af14 in child_main (child_num_arg=16) at http_main.c:1247
#11 0x1b124 in make_child (server_conf=0x6c1a0, child_num=16)
at http_main.c:1293
#12 0x1b88c in standalone_main (argc=3, argv=0xeffff724) at
http_main.c:1463
#13 0x1baac in main (argc=3, argv=0xeffff724) at http_main.c:1529
The most strange thing is that mod_proxy.c:2942 reads
i = cache_update(c, resp_hdrs, inprotocol, nocache);
if (i != DECLINED)
{
pclosef(pool, sock);
return i;
}
No strlen() visible here. Is the stack corrupted?
Furthermore, I ran the very same apache binary on a SS2:
SunOS pasta 5.5 Generic_103093-03 sun4c sparc SUNW,Sun_4_75
The OS version and patchlevel is _exactly_ the same as on the SS20,
but ProxyPass works just fine on this machine! I also tried this
with _another_ SS20 with similar configuration and it fails.
Next I am going to recompile the latest versions of gcc and gdb and retry.
// sjm
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