From: Mark Andrews <marka@isc.org>
Date: Fri, 22 Nov 2019 00:55:47 +0000 (+1100)
Subject: lock disp->mgr before reading disp->mgr->buffers
X-Git-Tag: v9.15.7~70^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=afc7389ce8fb0fd5a360cb9a48b4db874aa230e2;p=thirdparty%2Fbind9.git

lock disp->mgr before reading disp->mgr->buffers
---

diff --git a/lib/dns/dispatch.c b/lib/dns/dispatch.c
index 4a77b7fe457..6cd2fd7fe35 100644
--- a/lib/dns/dispatch.c
+++ b/lib/dns/dispatch.c
@@ -1045,9 +1045,11 @@ udp_recv(isc_event_t *ev_in, dns_dispatch_t *disp, dispsocket_t *dispsock) {
 	mgr = disp->mgr;
 	qid = mgr->qid;
 
+	LOCK(&disp->mgr->buffer_lock);
 	dispatch_log(disp, LVL(90),
 		     "got packet: requests %d, buffers %d, recvs %d",
 		     disp->requests, disp->mgr->buffers, disp->recv_pending);
+	UNLOCK(&disp->mgr->buffer_lock);
 
 	if (dispsock == NULL && ev->ev_type == ISC_SOCKEVENT_RECVDONE) {
 		/*