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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2011-12-24 19:03:46 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2011-12-24 19:49:04 +0100 |
| commit | 81378f728fe560e175fb2e8fd33206793567e896 (patch) | |
| tree | 9b64245afa92a9790c9df00067250ed625c5156e /net | |
| parent | 3f1e6d3fd37bd4f25e5b19f1c7ca21850426c33f (diff) | |
| download | linux-81378f728fe560e175fb2e8fd33206793567e896.tar.gz linux-81378f728fe560e175fb2e8fd33206793567e896.tar.bz2 linux-81378f728fe560e175fb2e8fd33206793567e896.zip | |
netfilter: ctnetlink: fix return value of ctnetlink_get_expect()
This fixes one bogus error that is returned to user-space:
libnetfilter_conntrack/utils# ./expect_get
TEST: get expectation (-1)(Unknown error 18446744073709551504)
This patch includes the correct handling for EAGAIN (nfnetlink
uses this error value to restart the operation after module
auto-loading).
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nf_conntrack_netlink.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index ef21b221f036..3d7ea7af76fc 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -1869,25 +1869,30 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, err = -ENOMEM; skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); - if (skb2 == NULL) + if (skb2 == NULL) { + nf_ct_expect_put(exp); goto out; + } rcu_read_lock(); err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); rcu_read_unlock(); + nf_ct_expect_put(exp); if (err <= 0) goto free; - nf_ct_expect_put(exp); + err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); + if (err < 0) + goto out; - return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); + return 0; free: kfree_skb(skb2); out: - nf_ct_expect_put(exp); - return err; + /* this avoids a loop in nfnetlink. */ + return err == -EAGAIN ? -ENOBUFS : err; } static int |