From: Cong Wang <xiyou.wangc...@gmail.com>
Date: Tue, 9 Jul 2019 23:24:54 -0700
> Switching from ->priv_destructor to dellink() has an unexpected
> consequence: existing RCU readers, that is, hsr_port_get_hsr()
> callers, may still be able to read the port list.
>
> Instead of checking the return value of each hsr_port_get_hsr(),
> we can just move it to ->ndo_uninit() which is called after
> device unregister and synchronize_net(), and we still have RTNL
> lock there.
>
> Fixes: b9a1e627405d ("hsr: implement dellink to clean up resources")
> Fixes: edf070a0fb45 ("hsr: fix a NULL pointer deref in hsr_dev_xmit()")
> Reported-by: syzbot+097ef84cdc95843fb...@syzkaller.appspotmail.com
> Cc: Arvid Brodin <arvid.bro...@alten.se>
> Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
Applied and queued up for -stable, thanks.
