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authorPatrick McHardy <kaber@trash.net>2005-07-22 12:51:03 -0700
committerDavid S. Miller <davem@davemloft.net>2005-07-22 12:51:03 -0700
commit21f930e4abdcb9649f26e5b959c14dddee4e600b (patch)
tree524b3bfee593f20a52fab80c7bb4da3ac0ad3ad8
parentd04b4f8c1c9766e49fad6a141fc61cb30db69a5c (diff)
[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 <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/netfilter/ip_conntrack_core.c3
1 files changed, 3 insertions, 0 deletions
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);