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From 4c5cbdfb82e668268a5f3713fe119fb077667c8e Mon Sep 17 00:00:00 2001
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From: rpm-build <rpm-build>
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Date: Mon, 22 Aug 2022 21:59:42 +0200
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Subject: [PATCH] Ensure also server_domains_cleanup is called always
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Fixes issue in patch dnsmasq-2.79-server-domain-rh1919894.patch.
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When /etc/resolv.conf is changed, dnsmasq reloads used servers. But it
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does not call cleanup of server domains in this case. It might cause
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serv_domain->last_server to become non-null, but pointing released
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server. Ensure it is checked before any cleanup_servers() action always
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and from all other places, like dbus setting.
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Caused unending loop in forward_query function, rhbz#2106361.
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---
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src/network.c | 49 +++++++++++++++++++++++++------------------------
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1 file changed, 25 insertions(+), 24 deletions(-)
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diff --git a/src/network.c b/src/network.c
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index 4d140bb..96668fb 100644
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--- a/src/network.c
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+++ b/src/network.c
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@@ -1402,10 +1402,35 @@ void mark_servers(int flag)
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}
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}
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+static void server_domains_cleanup(void)
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+{
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+ struct server_domain *sd, *tmp, **up;
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+
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+ /* unlink and free anything still marked. */
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+ for (up = &daemon->server_domains, sd=*up; sd; sd = tmp)
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+ {
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+ tmp = sd->next;
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+ if (sd->flags & SERV_MARK)
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+ {
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+ *up = sd->next;
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+ if (sd->domain)
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+ free(sd->domain);
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+ free(sd);
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+ }
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+ else {
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+ up = &sd->next;
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+ if (sd->last_server && (sd->last_server->flags & SERV_MARK))
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+ sd->last_server = NULL;
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+ }
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+ }
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+}
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+
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void cleanup_servers(void)
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{
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struct server *serv, *tmp, **up;
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+ server_domains_cleanup();
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+
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/* unlink and free anything still marked. */
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for (serv = daemon->servers, up = &daemon->servers; serv; serv = tmp)
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{
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@@ -1428,29 +1453,6 @@ void cleanup_servers(void)
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#endif
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}
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-void server_domains_cleanup(void)
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-{
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- struct server_domain *sd, *tmp, **up;
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-
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- /* unlink and free anything still marked. */
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- for (up = &daemon->server_domains, sd=*up; sd; sd = tmp)
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- {
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- tmp = sd->next;
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- if (sd->flags & SERV_MARK)
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- {
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- *up = sd->next;
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- if (sd->domain)
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- free(sd->domain);
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- free(sd);
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- }
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- else {
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- up = &sd->next;
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- if (sd->last_server && (sd->last_server->flags & SERV_MARK))
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- sd->last_server = NULL;
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- }
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- }
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-}
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-
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void add_update_server(int flags,
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union mysockaddr *addr,
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union mysockaddr *source_addr,
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@@ -1739,7 +1741,6 @@ void check_servers(void)
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up = &sfd->next;
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}
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- server_domains_cleanup();
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cleanup_servers();
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}
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--
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2.37.2
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