Cong Wang 4df0bfc799
tun: fix a memory leak for tfile->tx_array ...
tfile->tun could be detached before we close the tun fd,
via tun_detach_all(), so it should not be used to check for
tfile->tx_array.
As Jason suggested, we probably have to clean it up
unconditionally both in __tun_deatch() and tun_detach_all(),
but this requires to check if it is initialized or not.
Currently skb_array_cleanup() doesn't have such a check,
so I check it in the caller and introduce a helper function,
it is a bit ugly but we can always improve it in net-next.
Reported-by: Dmitry Vyukov <dvyukov@google.com >
Fixes: 1576d98605jasowang@redhat.com >
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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4df0bfc799