From: Wei Yongjun <[email protected]>
Date: Mon, 13 Jul 2020 23:59:50 +0800
> KASAN report null-ptr-deref error when register_netdev() failed:
...
> ip6gre_tunnel_uninit() has set 'ign->fb_tunnel_dev' to NULL, later
> access to ign->fb_tunnel_dev cause null-ptr-deref. Fix it by saving
> 'ign->fb_tunnel_dev' to local variable ndev.
>
> Fixes: dafabb6590cb ("ip6_gre: fix use-after-free in ip6gre_tunnel_lookup()")
> Reported-by: Hulk Robot <[email protected]>
> Signed-off-by: Wei Yongjun <[email protected]>
Applied and queued up for -stable.
