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authorPatrick McHardy <kaber@trash.net>2005-12-05 13:37:33 -0800
committerDavid S. Miller <davem@davemloft.net>2005-12-05 13:37:33 -0800
commit266c8543480e2202ab63d1d604a5ca049f350cd8 (patch)
tree77c754dce63f39e1f9dc2d1768ecd348c1d50c74 /net
parent6636568cf85ef5898a892e90fcc88b61cca9ca27 (diff)
[NETFILTER]: Fix unbalanced read_unlock_bh in ctnetlink
NFA_NEST calls NFA_PUT which jumps to nfattr_failure if the skb has no room left. We call read_unlock_bh at nfattr_failure for the NFA_PUT inside the locked section, so move NFA_NEST inside the locked section too. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/netfilter/ip_conntrack_proto_tcp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
index aeb7353d477..e7fa29e576d 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
@@ -341,9 +341,10 @@ static int tcp_print_conntrack(struct seq_file *s,
static int tcp_to_nfattr(struct sk_buff *skb, struct nfattr *nfa,
const struct ip_conntrack *ct)
{
- struct nfattr *nest_parms = NFA_NEST(skb, CTA_PROTOINFO_TCP);
+ struct nfattr *nest_parms;
read_lock_bh(&tcp_lock);
+ nest_parms = NFA_NEST(skb, CTA_PROTOINFO_TCP);
NFA_PUT(skb, CTA_PROTOINFO_TCP_STATE, sizeof(u_int8_t),
&ct->proto.tcp.state);
read_unlock_bh(&tcp_lock);