Re: WARNING in xfrm_policy_inexact_gc_tree

syzbot [off-list ref] wrote:

HEAD commit:    74c4a24df7ca Add linux-next specific files for 20181207
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17bbea7d400000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6e9413388bf37bed
dashboard link: https://syzkaller.appspot.com/bug?extid=0b2f1bc876d301440d44
compiler:       gcc (GCC) 8.0.1 20180413 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0b2f1bc876d301440d44@syzkaller.appspotmail.com

IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
8021q: adding VLAN 0 to HW filter on device team0
WARNING: CPU: 0 PID: 13116 at net/xfrm/xfrm_policy.c:1066
xfrm_policy_inexact_gc_tree+0x233/0x280 net/xfrm/xfrm_policy.c:1066

This means we're exiting from net namespace, but for some reason
policies would be left behind.

At this point the storage should only contain empty nodes,
as all policies are supposed to be gone.

I'll have a look.