From 792ef9d3c71c6843dbbde450a2d6d1ade538f1f3 Mon Sep 17 00:00:00 2001 From: Max Romanov Date: Mon, 6 Apr 2020 16:52:11 +0300 Subject: Fixing 'find & add' racing condition in connected ports hash. Missing error log messages added. --- src/nxt_router.c | 32 ++++++++++++++++++-------------- 1 file changed, 18 insertions(+), 14 deletions(-) (limited to 'src/nxt_router.c') diff --git a/src/nxt_router.c b/src/nxt_router.c index d4f25d7e..a70b03d1 100644 --- a/src/nxt_router.c +++ b/src/nxt_router.c @@ -735,12 +735,15 @@ nxt_request_app_link_use(nxt_task_t *task, nxt_request_app_link_t *req_app_link, nxt_inline void -nxt_request_app_link_error(nxt_request_app_link_t *req_app_link, int code, - const char *str) +nxt_request_app_link_error(nxt_task_t *task, nxt_app_t *app, + nxt_request_app_link_t *req_app_link, const char *str) { req_app_link->app_port = NULL; - req_app_link->err_code = code; + req_app_link->err_code = 500; req_app_link->err_str = str; + + nxt_alert(task, "app \"%V\" internal error: %s on #%uD", + &app->name, str, req_app_link->stream); } @@ -3909,7 +3912,7 @@ nxt_router_app_port_error(nxt_task_t *task, nxt_port_recv_msg_t *msg, nxt_debug(task, "app '%V' %p abort next stream #%uD", &app->name, app, req_app_link->stream); - nxt_request_app_link_error(req_app_link, 500, + nxt_request_app_link_error(task, app, req_app_link, "Failed to start application process"); nxt_request_app_link_use(task, req_app_link, -1); } @@ -4665,7 +4668,7 @@ nxt_router_port_post_select(nxt_task_t *task, nxt_port_select_state_t *state) nxt_port_use(task, state->port, -1); } - nxt_request_app_link_error(state->req_app_link, 500, + nxt_request_app_link_error(task, app, state->req_app_link, "Failed to allocate shared req<->app link"); return NXT_ERROR; @@ -4693,7 +4696,7 @@ nxt_router_port_post_select(nxt_task_t *task, nxt_port_select_state_t *state) res = nxt_router_start_app_process(task, app); if (nxt_slow_path(res != NXT_OK)) { - nxt_request_app_link_error(req_app_link, 500, + nxt_request_app_link_error(task, app, req_app_link, "Failed to start app process"); return NXT_ERROR; @@ -4808,25 +4811,26 @@ nxt_router_app_prepare_request(nxt_task_t *task, apr_action = NXT_APR_REQUEST_FAILED; - c_port = nxt_process_connected_port_find(port->process, reply_port->pid, - reply_port->id); + c_port = nxt_process_connected_port_find_add(port->process, reply_port); + if (nxt_slow_path(c_port != reply_port)) { res = nxt_port_send_port(task, port, reply_port, 0); if (nxt_slow_path(res != NXT_OK)) { - nxt_request_app_link_error(req_app_link, 500, + nxt_request_app_link_error(task, port->app, req_app_link, "Failed to send reply port to application"); + + nxt_process_connected_port_remove(port->process, reply_port); + goto release_port; } - - nxt_process_connected_port_add(port->process, reply_port); } buf = nxt_router_prepare_msg(task, req_app_link->request, port, nxt_app_msg_prefix[port->app->type]); if (nxt_slow_path(buf == NULL)) { - nxt_request_app_link_error(req_app_link, 500, + nxt_request_app_link_error(task, port->app, req_app_link, "Failed to prepare message for application"); goto release_port; } @@ -4850,7 +4854,7 @@ nxt_router_app_prepare_request(nxt_task_t *task, &req_app_link->msg_info.tracking, req_app_link->stream); if (nxt_slow_path(res != NXT_OK)) { - nxt_request_app_link_error(req_app_link, 500, + nxt_request_app_link_error(task, port->app, req_app_link, "Failed to get tracking area"); goto release_port; } @@ -4868,7 +4872,7 @@ nxt_router_app_prepare_request(nxt_task_t *task, &req_app_link->msg_info.tracking); if (nxt_slow_path(res != NXT_OK)) { - nxt_request_app_link_error(req_app_link, 500, + nxt_request_app_link_error(task, port->app, req_app_link, "Failed to send message to application"); goto release_port; } -- cgit