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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2011-12-24 18:28:47 (GMT) |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2011-12-24 18:49:04 (GMT) |
| commit | 1a31a4a8388a90e9240fb4e5e5c9c909fcfdfd0e (patch) | |
| tree | bff2c3e3e1da9274bd5d33e36e8fd9479f21ba72 | |
| parent | 81378f728fe560e175fb2e8fd33206793567e896 (diff) | |
| download | linux-1a31a4a8388a90e9240fb4e5e5c9c909fcfdfd0e.tar.xz | |
netfilter: ctnetlink: fix scheduling while atomic if helper is autoloaded
This patch fixes one scheduling while atomic error:
[ 385.565186] ctnetlink v0.93: registering with nfnetlink.
[ 385.565349] BUG: scheduling while atomic: lt-expect_creat/16163/0x00000200
It can be triggered with utils/expect_create included in
libnetfilter_conntrack if the FTP helper is not loaded.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | net/netfilter/nf_conntrack_netlink.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 3d7ea7a..b697777 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -1358,12 +1358,15 @@ ctnetlink_create_conntrack(struct net *net, u16 zone, nf_ct_protonum(ct)); if (helper == NULL) { rcu_read_unlock(); + spin_unlock_bh(&nf_conntrack_lock); #ifdef CONFIG_MODULES if (request_module("nfct-helper-%s", helpname) < 0) { + spin_lock_bh(&nf_conntrack_lock); err = -EOPNOTSUPP; goto err1; } + spin_lock_bh(&nf_conntrack_lock); rcu_read_lock(); helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |