zebra: Cleanup ctx leak on shutdown and turn off event

two things: On shutdown cleanup any events associated with the update walker. Also do not allow new events to be created. Fixes this mem-leak: ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790:Direct leak of 8 byte(s) in 1 object(s) allocated from: ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #0 0x7f0dd0b08037 in __interceptor_calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:154 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #1 0x7f0dd06c19f9 in qcalloc lib/memory.c:105 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #2 0x55b42fb605bc in rib_update_ctx_init zebra/zebra_rib.c:4383 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #3 0x55b42fb6088f in rib_update zebra/zebra_rib.c:4421 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #4 0x55b42fa00344 in netlink_link_change zebra/if_netlink.c:2221 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #5 0x55b42fa24622 in netlink_information_fetch zebra/kernel_netlink.c:399 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #6 0x55b42fa28c02 in netlink_parse_info zebra/kernel_netlink.c:1183 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #7 0x55b42fa24951 in kernel_read zebra/kernel_netlink.c:493 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #8 0x7f0dd0797f0c in event_call lib/event.c:1995 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #9 0x7f0dd0684fd9 in frr_run lib/libfrr.c:1185 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #10 0x55b42fa30caa in main zebra/main.c:465 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- #11 0x7f0dd01b5d09 in __libc_start_main ../csu/libc-start.c:308 ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790- ./msdp_topo1.test_msdp_topo1/r2.zebra.asan.1117790-SUMMARY: AddressSanitizer: 8 byte(s) leaked in 1 allocation(s). Signed-off-by: Donald Sharp <sharpd@nvidia.com>
opensourcerouting · Mar 31, 2023 · 3cd0acc · 3cd0acc
1 parent f3cf1bc
commit 3cd0acc
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diff --git a/zebra/main.c b/zebra/main.c
@@ -185,6 +185,8 @@ static void sigint(void)
 	 */
 	zebra_routemap_finish();
 
+	rib_update_finish();
+
 	list_delete(&zrouter.client_list);
 
 	/* Indicate that all new dplane work has been enqueued. When that

diff --git a/zebra/rib.h b/zebra/rib.h
@@ -323,6 +323,7 @@ enum rib_update_event {
 	RIB_UPDATE_OTHER,
 	RIB_UPDATE_MAX
 };
+void rib_update_finish(void);
 
 int route_entry_update_nhe(struct route_entry *re,
 			   struct nhg_hash_entry *new_nhghe);

diff --git a/zebra/zebra_rib.c b/zebra/zebra_rib.c
@@ -4410,6 +4410,22 @@ static void rib_update_handler(struct event *thread)
  */
 static struct event *t_rib_update_threads[RIB_UPDATE_MAX];
 
+void rib_update_finish(void)
+{
+	int i;
+
+	for (i = RIB_UPDATE_KERNEL; i < RIB_UPDATE_MAX; i++) {
+		if (event_is_scheduled(t_rib_update_threads[i])) {
+			struct rib_update_ctx *ctx;
+
+			ctx = EVENT_ARG(t_rib_update_threads[i]);
+
+			rib_update_ctx_fini(&ctx);
+			EVENT_OFF(t_rib_update_threads[i]);
+		}
+	}
+}
+
 /* Schedule a RIB update event for all vrfs */
 void rib_update(enum rib_update_event event)
 {
@@ -4418,6 +4434,9 @@ void rib_update(enum rib_update_event event)
 	if (event_is_scheduled(t_rib_update_threads[event]))
 		return;
 
+	if (zebra_router_in_shutdown())
+		return;
+
 	ctx = rib_update_ctx_init(0, event);
 
 	event_add_event(zrouter.master, rib_update_handler, ctx, 0,