]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
openvswitch: Fix refcount leak on force commit.
authorJarno Rajahalme <jarno@ovn.org>
Tue, 28 Mar 2017 18:25:26 +0000 (11:25 -0700)
committerDavid S. Miller <davem@davemloft.net>
Wed, 29 Mar 2017 04:56:11 +0000 (21:56 -0700)
commitb768b16de58d5e0b1d7c3f936825b25327ced20c
tree18439a399046ebf9d27ca76dadc1ba94c9534bc5
parent16b8b6de32572207abeb4dfb74ab7bd8409a5690
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>
net/openvswitch/conntrack.c