From 21f930e4abdcb9649f26e5b959c14dddee4e600b Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Fri, 22 Jul 2005 12:51:03 -0700 Subject: [PATCH] [NETFILTER]: Wait until all references to ip_conntrack_untracked are dropped on unload Fixes a crash when unloading ip_conntrack. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/netfilter/ip_conntrack_core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c index 14af55cad5d..63bf8826498 100644 --- a/net/ipv4/netfilter/ip_conntrack_core.c +++ b/net/ipv4/netfilter/ip_conntrack_core.c @@ -1107,6 +1107,9 @@ void ip_conntrack_cleanup(void) schedule(); goto i_see_dead_people; } + /* wait until all references to ip_conntrack_untracked are dropped */ + while (atomic_read(&ip_conntrack_untracked.ct_general.use) > 1) + schedule(); kmem_cache_destroy(ip_conntrack_cachep); kmem_cache_destroy(ip_conntrack_expect_cachep); -- 2.41.0