> On Jul 15, 2020, at 23:02, Chuck Lever <chuck.le...@oracle.com> wrote:
>
>
>
>> On Jul 15, 2020, at 10:48 AM, Kai-Heng Feng <kai.heng.f...@canonical.com>
>> wrote:
>>
>> Hi,
>>
>> Multiple users reported NFS causes NULL pointer dereference [1] on Ubuntu,
>> due to commit "SUNRPC: Add "@len" parameter to gss_unwrap()" and commit
>> "SUNRPC: Fix GSS privacy computation of auth->au_ralign".
>>
>> The same issue happens on upstream stable 5.4.y branch.
>> The mainline kernel doesn't have this issue though.
>>
>> Should we revert them? Or is there any missing commits need to be backported
>> to v5.4?
>>
>> [1] https://bugs.launchpad.net/bugs/1886277
>>
>> Kai-Heng
>
> 31c9590ae468 ("SUNRPC: Add "@len" parameter to gss_unwrap()") is a refactoring
> change. It shouldn't have introduced any behavior difference. But in theory,
> practice and theory should be the same...
>
> Check if 0a8e7b7d0846 ("SUNRPC: Revert 241b1f419f0e ("SUNRPC: Remove
> xdr_buf_trim()")")
> is also applied to 5.4.0-40-generic.
Yes, it's included. The commit is part of upstream stable 5.4.
>
> It would help to know if v5.5 stable is working for you. I haven't had any
> problems with it.
I'll ask users to test it out.
Thanks for you quick reply!
Kai-Heng
>
>
> --
> Chuck Lever
>
>
>
