From c128740cb957e3908c4a8057f6170fa0d68c93a4 Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Sat, 19 May 2018 04:17:49 +0200 Subject: allowedips: set pointer to null before freeing --- src/allowedips.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/allowedips.c b/src/allowedips.c index 293bb75..07b2a3c 100644 --- a/src/allowedips.c +++ b/src/allowedips.c @@ -279,11 +279,12 @@ void allowedips_init(struct allowedips *table) void allowedips_free(struct allowedips *table, struct mutex *lock) { + struct allowedips_node __rcu *old4 = table->root4, *old6 = table->root6; ++table->seq; - free_root_node(table->root4, lock); rcu_assign_pointer(table->root4, NULL); - free_root_node(table->root6, lock); rcu_assign_pointer(table->root6, NULL); + free_root_node(old4, lock); + free_root_node(old6, lock); } int allowedips_insert_v4(struct allowedips *table, const struct in_addr *ip, u8 cidr, struct wireguard_peer *peer, struct mutex *lock) -- cgit v1.2.3-59-g8ed1b