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* Do not reset the retry timeout if the worker is in error at this stage even

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if the connection to the backend was successful. It was likely set into
   error by a different thread / process in parallel e.g. for a timeout or
   bad status. We should respect this and should not continue with a connection
   via this worker even if we got one.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1664709 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Ruediger Pluem
2015-03-06 19:31:42 +00:00
parent 551fe1294d
commit 6864b2c781
2 changed files with 41 additions and 23 deletions
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3
CHANGES
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@@ -1,6 +1,9 @@
-*- coding: utf-8 -*-
Changes with Apache 2.5.0
*) mod_proxy: Fix a race condition that caused a failed worker to be retried
before the retry period is over. [Ruediger Pluem]
*) SECURITY: CVE-2015-0253 (cve.mitre.org)
core: Fix a crash introduced in with ErrorDocument 400 pointing
to a local URL-path with the INCLUDES filter active, introduced

21
modules/proxy/proxy_util.c
View File

@@ -2887,14 +2887,15 @@ PROXY_DECLARE(int) ap_proxy_connect_backend(const char *proxy_function,
connected = 1;
}
if (PROXY_WORKER_IS_USABLE(worker)) {
/*
* Put the entire worker to error state if
* the PROXY_WORKER_IGNORE_ERRORS flag is not set.
* Altrough some connections may be alive
* Although some connections may be alive
* no further connections to the worker could be made
*/
if (!connected && PROXY_WORKER_IS_USABLE(worker) &&
!(worker->s->status & PROXY_WORKER_IGNORE_ERRORS)) {
if (!connected) {
if (!(worker->s->status & PROXY_WORKER_IGNORE_ERRORS)) {
worker->s->error_time = apr_time_now();
worker->s->status |= PROXY_WORKER_IN_ERROR;
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(00959)
@@ -2902,6 +2903,7 @@ PROXY_DECLARE(int) ap_proxy_connect_backend(const char *proxy_function,
APR_TIME_T_FMT "s",
worker->s->hostname, apr_time_sec(worker->s->retry));
}
}
else {
if (worker->s->retries) {
/*
@@ -2914,6 +2916,19 @@ PROXY_DECLARE(int) ap_proxy_connect_backend(const char *proxy_function,
worker->s->retries = 0;
}
return connected ? OK : DECLINED;
}
else {
/*
* The worker is in error likely done by a different thread / process
* e.g. for a timeout or bad status. We should respect this and should
* not continue with a connection via this worker even if we got one.
*/
if (connected) {
apr_socket_close(conn->sock );
conn->sock = NULL;
}
return DECLINED;
}
}
static apr_status_t connection_shutdown(void *theconn)