From afc7389ce8fb0fd5a360cb9a48b4db874aa230e2 Mon Sep 17 00:00:00 2001 From: Mark Andrews Date: Fri, 22 Nov 2019 11:55:47 +1100 Subject: [PATCH] lock disp->mgr before reading disp->mgr->buffers --- lib/dns/dispatch.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/dns/dispatch.c b/lib/dns/dispatch.c index 4a77b7fe45..6cd2fd7fe3 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) { /*