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From c724e008771aaaed70f909cb28fdcab1c9244d22 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 18 May 2015 23:23:17 +0200
Subject: [PATCH] resolved: fix crash when shutting down
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Reported by Cristian Rodríguez
http://lists.freedesktop.org/archives/systemd-devel/2015-May/031626.html
(cherry picked from commit cab5b05903096e1c9cf5575ccc73f89d15c8db69)
Cherry-picked from: cab5b05
Resolves: #1222517
---
src/resolve/resolved-dns-cache.c | 4 +---
src/resolve/resolved-dns-server.c | 15 ++++++++-------
src/resolve/resolved-link.c | 6 +++---
src/resolve/resolved-manager.c | 4 ++--
src/shared/prioq.c | 6 ++++--
src/shared/prioq.h | 2 +-
6 files changed, 19 insertions(+), 18 deletions(-)
diff --git a/src/resolve/resolved-dns-cache.c b/src/resolve/resolved-dns-cache.c
index 33ca4d1a4..874207cfb 100644
--- a/src/resolve/resolved-dns-cache.c
+++ b/src/resolve/resolved-dns-cache.c
@@ -93,9 +93,7 @@ void dns_cache_flush(DnsCache *c) {
hashmap_free(c->by_key);
c->by_key = NULL;
-
- prioq_free(c->by_expiry);
- c->by_expiry = NULL;
+ c->by_expiry = prioq_free(c->by_expiry);
}
static void dns_cache_remove(DnsCache *c, DnsResourceKey *key) {
diff --git a/src/resolve/resolved-dns-server.c b/src/resolve/resolved-dns-server.c
index caf06fe45..9a62a6325 100644
--- a/src/resolve/resolved-dns-server.c
+++ b/src/resolve/resolved-dns-server.c
@@ -78,23 +78,24 @@ DnsServer* dns_server_free(DnsServer *s) {
if (!s)
return NULL;
- if (s->manager) {
+ if (s->link) {
if (s->type == DNS_SERVER_LINK)
LIST_REMOVE(servers, s->link->dns_servers, s);
- else if (s->type == DNS_SERVER_SYSTEM)
+
+ if (s->link->current_dns_server == s)
+ link_set_dns_server(s->link, NULL);
+ }
+
+ if (s->manager) {
+ if (s->type == DNS_SERVER_SYSTEM)
LIST_REMOVE(servers, s->manager->dns_servers, s);
else if (s->type == DNS_SERVER_FALLBACK)
LIST_REMOVE(servers, s->manager->fallback_dns_servers, s);
- else
- assert_not_reached("Unknown server type");
if (s->manager->current_dns_server == s)
manager_set_dns_server(s->manager, NULL);
}
- if (s->link && s->link->current_dns_server == s)
- link_set_dns_server(s->link, NULL);
-
free(s);
return NULL;
diff --git a/src/resolve/resolved-link.c b/src/resolve/resolved-link.c
index f94e4bb6f..27d9129e0 100644
--- a/src/resolve/resolved-link.c
+++ b/src/resolve/resolved-link.c
@@ -68,13 +68,13 @@ Link *link_free(Link *l) {
if (l->manager)
hashmap_remove(l->manager->links, INT_TO_PTR(l->ifindex));
+ while (l->dns_servers)
+ dns_server_free(l->dns_servers);
+
dns_scope_free(l->unicast_scope);
dns_scope_free(l->llmnr_ipv4_scope);
dns_scope_free(l->llmnr_ipv6_scope);
- while (l->dns_servers)
- dns_server_free(l->dns_servers);
-
free(l);
return NULL;
}
diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index b5ad70161..7c253aa13 100644
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -536,11 +536,11 @@ Manager *manager_free(Manager *m) {
while (m->dns_queries)
dns_query_free(m->dns_queries);
- dns_scope_free(m->unicast_scope);
-
manager_flush_dns_servers(m, DNS_SERVER_SYSTEM);
manager_flush_dns_servers(m, DNS_SERVER_FALLBACK);
+ dns_scope_free(m->unicast_scope);
+
hashmap_free(m->links);
hashmap_free(m->dns_transactions);
diff --git a/src/shared/prioq.c b/src/shared/prioq.c
index 8af4c51c2..b89888be0 100644
--- a/src/shared/prioq.c
+++ b/src/shared/prioq.c
@@ -45,12 +45,14 @@ Prioq *prioq_new(compare_func_t compare_func) {
return q;
}
-void prioq_free(Prioq *q) {
+Prioq* prioq_free(Prioq *q) {
if (!q)
- return;
+ return NULL;
free(q->items);
free(q);
+
+ return NULL;
}
int prioq_ensure_allocated(Prioq **q, compare_func_t compare_func) {
diff --git a/src/shared/prioq.h b/src/shared/prioq.h
index d836b36cd..1c044b135 100644
--- a/src/shared/prioq.h
+++ b/src/shared/prioq.h
@@ -28,7 +28,7 @@ typedef struct Prioq Prioq;
#define PRIOQ_IDX_NULL ((unsigned) -1)
Prioq *prioq_new(compare_func_t compare);
-void prioq_free(Prioq *q);
+Prioq *prioq_free(Prioq *q);
int prioq_ensure_allocated(Prioq **q, compare_func_t compare_func);
int prioq_put(Prioq *q, void *data, unsigned *idx);