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[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>
hifive-unleashed-5.1
Patrick McHardy 2005-07-22 12:51:03 -07:00 committed by David S. Miller
parent d04b4f8c1c
commit 21f930e4ab
1 changed files with 3 additions and 0 deletions
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3
net/ipv4/netfilter/ip_conntrack_core.c
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@ -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);