From: Christopher Faulet <cfaulet@haproxy.com>
Date: Thu, 30 Jul 2020 08:40:58 +0000 (+0200)
Subject: BUG/MINOR: lua: Fix a possible null pointer deref on lua ctx
X-Git-Tag: v2.3-dev2~11
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2361fd9487982225e816d61f8388447068540f8a;p=thirdparty%2Fhaproxy.git

BUG/MINOR: lua: Fix a possible null pointer deref on lua ctx

This bug was introduced by the commit 8f587ea3 ("MEDIUM: lua: Set the analyse
expiration date with smaller wake_time only"). At the end of hlua_action(), the
lua context may be null if the alloc failed.

No backport needed, this is 2.3-dev.
---

diff --git a/src/hlua.c b/src/hlua.c
index a3726ca2ff..844a5ec9da 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -6706,7 +6706,7 @@ static enum act_return hlua_action(struct act_rule *rule, struct proxy *px,
 	}
 
  end:
-	if (act_ret != ACT_RET_YIELD)
+	if (act_ret != ACT_RET_YIELD && s->hlua)
 		s->hlua->wake_time = TICK_ETERNITY;
 	return act_ret;
 }