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[core] fix crash in error trace if backend is down (fixes #3052) 

(thx hamelg)

x-ref:
  "segfault with mod_scgi on backend server with unix socket domain"
  https://redmine.lighttpd.net/issues/3052
personal/stbuehler/tests-path
Glenn Strauss 2021-01-08 17:34:32 -05:00
parent be8909833b
commit 8faa456fc8
1 changed files with 9 additions and 5 deletions
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14
src/gw_backend.c
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@ -314,7 +314,8 @@ static void gw_proc_check_enable(gw_host * const host, gw_proc * const proc, log
log_error(errh, __FILE__, __LINE__,
"gw-server re-enabled: %s %s %hu %s",
proc->connection_name->ptr, host->host->ptr, host->port,
proc->connection_name->ptr,
host->host ? host->host->ptr : "", host->port,
host->unixsocket && host->unixsocket->ptr ? host->unixsocket->ptr : "");
}
@ -831,7 +832,8 @@ static gw_host * gw_host_get(request_st * const r, gw_extension *extension, int
if (debug) {
log_error(r->conf.errh, __FILE__, __LINE__,
"proxy - election: %s %s %s %u", r->uri.path.ptr,
host->host->ptr, r->uri.authority.ptr, cur_max);
host->host ? host->host->ptr : "",
r->uri.authority.ptr, cur_max);
}
if (last_max < cur_max || last_max == UINT32_MAX) {
@ -919,7 +921,8 @@ static gw_host * gw_host_get(request_st * const r, gw_extension *extension, int
if (debug) {
log_error(r->conf.errh, __FILE__, __LINE__,
"proxy - election: %s %s %hu %ld", dst_addr_buf->ptr,
host->host->ptr, host->port, cur_max);
host->host ? host->host->ptr : "",
host->port, cur_max);
}
if (last_max < cur_max || last_max == UINT32_MAX) {
@ -939,7 +942,8 @@ static gw_host * gw_host_get(request_st * const r, gw_extension *extension, int
if (debug) {
log_error(r->conf.errh, __FILE__, __LINE__,
"gw - found a host %s %hu", host->host->ptr, host->port);
"gw - found a host %s %hu",
host->host ? host->host->ptr : "", host->port);
}
return host;
@ -2625,7 +2629,7 @@ static void gw_handle_trigger_host(gw_host * const host, log_error_st * const er
if (debug) {
log_error(errh, __FILE__, __LINE__,
"idle-timeout reached, terminating child: socket: %s pid %d",
proc->unixsocket->ptr, proc->pid);
proc->unixsocket ? proc->unixsocket->ptr : "", proc->pid);
}
gw_proc_kill(host, proc);