On 7/13/20 8:59 AM, Wei Yongjun wrote:
> 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]>
>
Reviewed-by: Eric Dumazet <[email protected]>
