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authorYasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>2006-04-24 17:15:17 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-04-24 17:27:28 -0700
commite1bbdebdba615ddd957de81103aa2f7fa0581952 (patch)
tree58db2991440cfeca18678bdeed5dd45d38b186bb
parentd8fe3f19203b1f5070358aaa292d33295258b448 (diff)
[NETFILTER]: nf_conntrack: Fix module refcount dropping too far
If nf_ct_l3proto_find_get() fails to get the refcount of nf_ct_l3proto_generic, nf_ct_l3proto_put() will drop the refcount too far. This gets rid of '.me = THIS_MODULE' of nf_ct_l3proto_generic so that nf_ct_l3proto_find_get() doesn't try to get refcount of it. It's OK because its symbol is usable until nf_conntrack.ko is unloaded. This also kills unnecessary NULL pointer check as well. __nf_ct_proto_find() allways returns non-NULL pointer. Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/netfilter/nf_conntrack_core.c12
-rw-r--r--net/netfilter/nf_conntrack_l3proto_generic.c1
2 files changed, 4 insertions, 9 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index e581190fb6c3..e3022226a408 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -208,10 +208,8 @@ nf_ct_proto_find_get(u_int16_t l3proto, u_int8_t protocol)
preempt_disable();
p = __nf_ct_proto_find(l3proto, protocol);
- if (p) {
- if (!try_module_get(p->me))
- p = &nf_conntrack_generic_protocol;
- }
+ if (!try_module_get(p->me))
+ p = &nf_conntrack_generic_protocol;
preempt_enable();
return p;
@@ -229,10 +227,8 @@ nf_ct_l3proto_find_get(u_int16_t l3proto)
preempt_disable();
p = __nf_ct_l3proto_find(l3proto);
- if (p) {
- if (!try_module_get(p->me))
- p = &nf_conntrack_generic_l3proto;
- }
+ if (!try_module_get(p->me))
+ p = &nf_conntrack_generic_l3proto;
preempt_enable();
return p;
diff --git a/net/netfilter/nf_conntrack_l3proto_generic.c b/net/netfilter/nf_conntrack_l3proto_generic.c
index 7de4f06c63c5..3fc58e454d4e 100644
--- a/net/netfilter/nf_conntrack_l3proto_generic.c
+++ b/net/netfilter/nf_conntrack_l3proto_generic.c
@@ -94,5 +94,4 @@ struct nf_conntrack_l3proto nf_conntrack_generic_l3proto = {
.print_conntrack = generic_print_conntrack,
.prepare = generic_prepare,
.get_features = generic_get_features,
- .me = THIS_MODULE,
};

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