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move item_out test inside lock in dns_dispatch_getnext()

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Mark Andrews 2019-03-19 14:14:21 +11:00 committed by Evan Hunt
parent 95ecdcd762
commit a78a9d37a8
1 changed files with 8 additions and 4 deletions
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12
lib/dns/dispatch.c
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@ -126,7 +126,7 @@ struct dns_dispentry {
isc_task_t *task;
isc_taskaction_t action;
void *arg;
bool item_out;
bool item_out;
dispsocket_t *dispsocket;
ISC_LIST(dns_dispatchevent_t) items;
ISC_LINK(dns_dispentry_t) link;
@ -3271,13 +3271,14 @@ dns_dispatch_getnext(dns_dispentry_t *resp, dns_dispatchevent_t **sockevent) {
disp = resp->disp;
REQUIRE(VALID_DISPATCH(disp));
REQUIRE(resp->item_out == true);
resp->item_out = false;
ev = *sockevent;
*sockevent = NULL;
LOCK(&disp->lock);
REQUIRE(resp->item_out == true);
resp->item_out = false;
if (ev->buffer.base != NULL)
free_buffer(disp, ev->buffer.base, ev->buffer.length);
free_devent(disp, ev);
@ -3422,6 +3423,9 @@ dns_dispatch_removeresponse(dns_dispentry_t **resp,
isc_task_send(disp->task[0], &disp->ctlevent);
}
/*
* disp must be locked.
*/
static void
do_cancel(dns_dispatch_t *disp) {
dns_dispatchevent_t *ev;