https://bz.apache.org/bugzilla/show_bug.cgi?id=63176
Bug ID: 63176
Summary: Wrong backend is used
Product: Apache httpd-2
Version: 2.4.38
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mod_proxy
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Hello all,
I'm experiencing following issue. Let's create two files:
echo HIT > /var/www/html/test-hit.html
echo MISS > /var/www/html/test-miss.html
Content of /etc/httpd/conf.d/test.conf:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ProxyPass /test/ http://localhost/
ProxyRemoteMatch http://localhost/.*hit.html http://localhost:8080
Listen 8080
<VirtualHost *:8080>
ProxyRequests on
<Proxy "*">
Require all denied
</Proxy>
</VirtualHost>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
And then start httpd. Depending on request order, I'm receiving different
content:
[root@host-8-249-187 ~]# curl http://localhost/test/test-miss.html
MISS
[root@host-8-249-187 ~]# curl http://localhost/test/test-hit.html
HIT
[root@host-8-249-187 ~]# systemctl restart httpd
[root@host-8-249-187 ~]# curl http://localhost/test/test-hit.html
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>403 Forbidden</title>
</head><body>
<h1>Forbidden</h1>
<p>You don't have permission to access http://localhost/test-hit.html
on this server.<br />
</p>
</body></html>
[root@host-8-249-187 ~]# curl http://localhost/test/test-miss.html
MISS
I debugged it a bit and depending on request order, in
ap_proxy_acquire_connection, function apr_reslist_acquire acquiring different
values.
Correct case:
(gdb)
2292 if (worker->s->hmax && worker->cp->res) {
2293 rv = apr_reslist_acquire(worker->cp->res, (void **)conn);
2294 }
(gdb) p **conn
$10 = {connection = 0x0, r = 0x0, worker = 0x55555586df58, pool =
0x55555594cb78,
hostname = 0x0, addr = 0x0, scpool = 0x7fffb8007018, sock = 0x0, data = 0x0,
forward = 0x0, flags = 0, port = 0, is_ssl = 0, close = 0, need_flush = 0,
inreslist = 1, uds_path = 0x0, ssl_hostname = 0x0, tmp_bb = 0x0}
Whereas in wrong case:
(gdb) p **conn
$9 = {connection = 0x7fffb80072e0, r = 0x0, worker = 0x55555586df58,
pool = 0x55555594cb78, hostname = 0x55555594cc60 "localhost",
addr = 0x5555558e47c0, scpool = 0x7fffb8007018, sock = 0x7fffb8007090, data =
0x0,
forward = 0x0, flags = 0, port = 80, is_ssl = 0, close = 0, need_flush = 0,
inreslist = 1, uds_path = 0x0, ssl_hostname = 0x0, tmp_bb = 0x7fffb80072a0}
Also found out, that this was working in 2.4.34 and stopped to work in 2.4.37.
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