Re: BUG: unable to handle kernel NULL pointer dereference in fdb_find_rcu

[Nikolay Aleksandrov]

On 16/12/17 02:37, Andrei Vagin wrote:
> Hi,
> 
> We run criu tests for linux-next and today we get this bug:
> 
> The kernel version is 4.15.0-rc3-next-20171215
> 
> [  235.397328] BUG: unable to handle kernel NULL pointer dereference
> at 000000000000000c
> [  235.398624] IP: fdb_find_rcu+0x3c/0x130
[snip]

Hi,
Thanks for the report, I've missed the changelink before dev creation case when I did
the rhashtable conversion, some of the options do fdb lookups as part of their routine
but we don't have the table initialized yet at that point.
I'll send a fix after some testing.

Thanks,
 Nik