From: Nick Mathewson <nickm@torproject.org>
Date: Fri, 16 Nov 2012 16:55:27 +0000 (-0500)
Subject: Avoid crash when event_pending() called with no event_base set on event
X-Git-Tag: release-2.0.21-stable~4
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e3cccf380c23891089d7c3a4637cac50010a600d;p=libevent

Avoid crash when event_pending() called with no event_base set on event

Instead, give a warning and return 0.

Reported by Antony Dovgal on github as
   https://github.com/libevent/libevent/issues/19
---

diff --git a/event.c b/event.c
index 91cb0cce..a979f1f2 100644
--- a/event.c
+++ b/event.c
@@ -1850,6 +1850,11 @@ event_pending(const struct event *ev, short event, struct timeval *tv)
 {
 	int flags = 0;
 
+	if (EVUTIL_FAILURE_CHECK(ev->ev_base == NULL)) {
+		event_warnx("%s: event has no event_base set.", __func__);
+		return 0;
+	}
+
 	EVBASE_ACQUIRE_LOCK(ev->ev_base, th_base_lock);
 	_event_debug_assert_is_setup(ev);