Subject: Re: [syzbot] [rdma?] INFO: trying to register non-static key in skb_dequeue (2)

From: Guoqing Jiang <[email-masked]>
Date: Tue, 23 May 2023 13:50:28 +0800

On 5/23/23 12:29, Zhu Yanjun wrote:
> On Tue, May 23, 2023 at 12:10 PM Guoqing Jiang <[email-masked]> wrote:
>>
>>
>> On 5/23/23 12:02, Zhu Yanjun wrote:
>>> On Tue, May 23, 2023 at 11:47 AM Zhu Yanjun <[email-masked]> wrote:
>>>> On Tue, May 23, 2023 at 10:26 AM Guoqing Jiang <[email-masked]> wrote:
>>>>>
>>>>> On 5/23/23 10:13, syzbot wrote:
>>>>>> Hello,
>>>>>>
>>>>>> syzbot tried to test the proposed patch but the build/boot failed:
>>>>>>
>>>>>> failed to apply patch:
>>>>>> checking file drivers/infiniband/sw/rxe/rxe_qp.c
>>>>>> patch: **** unexpected end of file in patch
>>>> This is not the root cause. The fix is not good.
>>> This problem is about "INFO: trying to register non-static key. The
>>> code is fine but needs lockdep annotation, or maybe"
> This warning is from "lock is not initialized". This is a
> use-before-initialized problem.

Right, and it also applies to qp->sq.queue which is set to NULL while do 
cleanup
still de-reference it.

> The correct fix is to initialize the lock that is complained before it is used.

The thing is it can't be initialized due to error, so I guess you want 
to always init them
even for error cases.

Guoqing