From: Eric Dumazet <[email protected]>
Date: Tue, 8 Sep 2020 01:20:23 -0700
> syzbot reported twice a lockdep issue in fib6_del() [1]
> which I think is caused by net->ipv6.fib6_null_entry
> having a NULL fib6_table pointer.
>
> fib6_del() already checks for fib6_null_entry special
> case, we only need to return earlier.
>
> Bug seems to occur very rarely, I have thus chosen
> a 'bug origin' that makes backports not too complex.
...
> Fixes: 421842edeaf6 ("net/ipv6: Add fib6_null_entry")
> Signed-off-by: Eric Dumazet <[email protected]>
Applied and queued up for -stable, thanks Eric.
