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| author | Jarno Rajahalme <jarno@ovn.org> | 2017-03-28 11:25:26 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-28 21:56:11 -0700 |
| commit | b768b16de58d5e0b1d7c3f936825b25327ced20c (patch) | |
| tree | 18439a399046ebf9d27ca76dadc1ba94c9534bc5 /net/openvswitch | |
| parent | 16b8b6de32572207abeb4dfb74ab7bd8409a5690 (diff) | |
| download | linux-b768b16de58d5e0b1d7c3f936825b25327ced20c.tar.gz linux-b768b16de58d5e0b1d7c3f936825b25327ced20c.tar.bz2 linux-b768b16de58d5e0b1d7c3f936825b25327ced20c.zip | |
openvswitch: Fix refcount leak on force commit.
The reference count held for skb needs to be released when the skb's
nfct pointer is cleared regardless of if nf_ct_delete() is called or
not.
Failing to release the skb's reference cound led to deferred conntrack
cleanup spinning forever within nf_conntrack_cleanup_net_list() when
cleaning up a network namespace:
kworker/u16:0-19025 [004] 45981067.173642: sched_switch: kworker/u16:0:19025 [120] R ==> rcu_preempt:7 [120]
kworker/u16:0-19025 [004] 45981067.173651: kernel_stack: <stack trace>
=> ___preempt_schedule (ffffffffa001ed36)
=> _raw_spin_unlock_bh (ffffffffa0713290)
=> nf_ct_iterate_cleanup (ffffffffc00a4454)
=> nf_conntrack_cleanup_net_list (ffffffffc00a5e1e)
=> nf_conntrack_pernet_exit (ffffffffc00a63dd)
=> ops_exit_list.isra.1 (ffffffffa06075f3)
=> cleanup_net (ffffffffa0607df0)
=> process_one_work (ffffffffa0084c31)
=> worker_thread (ffffffffa008592b)
=> kthread (ffffffffa008bee2)
=> ret_from_fork (ffffffffa071b67c)
Fixes: dd41d33f0b03 ("openvswitch: Add force commit.")
Reported-by: Yang Song <yangsong@vmware.com>
Signed-off-by: Jarno Rajahalme <jarno@ovn.org>
Acked-by: Joe Stringer <joe@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch')
| -rw-r--r-- | net/openvswitch/conntrack.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c index e0a87776a010..7b2c2fce408a 100644 --- a/net/openvswitch/conntrack.c +++ b/net/openvswitch/conntrack.c @@ -643,8 +643,8 @@ static bool skb_nfct_cached(struct net *net, */ if (nf_ct_is_confirmed(ct)) nf_ct_delete(ct, 0, 0); - else - nf_conntrack_put(&ct->ct_general); + + nf_conntrack_put(&ct->ct_general); nf_ct_set(skb, NULL, 0); return false; } |