From: Eric W Biederman <[email protected]>
Signed-off-by: "Eric W. Biederman" <[email protected]>
---
net/netfilter/core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 95456c09cf69..1b4eadc9c030 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -134,7 +134,9 @@ void nf_unregister_hook(struct net *net, const struct
nf_hook_ops *reg)
#ifdef HAVE_JUMP_LABEL
static_key_slow_dec(&nf_hooks_needed[reg->pf][reg->hooknum]);
#endif
- synchronize_net();
+ /* Don't wait if there are no packets in flight */
+ if (net->loopback_dev)
+ synchronize_net();
kfree(elem);
}
EXPORT_SYMBOL(nf_unregister_hook);
--
2.2.1
--
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