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vhost: listen: protect listen port transfer between

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...vhosts from vh destroy on zero refcount

https://github.com/warmcat/libwebsockets/issues/2343
This commit is contained in:
Andy Green 2021-07-12 06:12:05 +01:00
parent 041baf93cf
commit e90f005a10
1 changed files with 15 additions and 0 deletions
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15
lib/core-net/vhost.c
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@ -1272,8 +1272,23 @@ lws_vhost_destroy1(struct lws_vhost *vh)
if (v->lserv_wsi) {
/* req cx + vh lock */
/*
* If the vhost sees it's being destroyed and
* in the unbind the number of wsis bound to
* it falls to zero, it will destroy the
* vhost opportunistically before we can
* complete the transfer. Add a fake wsi
* bind temporarily to disallow this...
*/
v->count_bound_wsi++;
__lws_vhost_unbind_wsi(vh->lserv_wsi);
lws_vhost_bind_wsi(v, v->lserv_wsi);
/*
* ... remove the fake wsi bind
*/
v->count_bound_wsi--;
vh->lserv_wsi = NULL;
}