linux-kernel - Re: [syzbot] [rdma?] INFO: trying to register non-static key in skb

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Date:   Tue, 23 May 2023 13:55:34 +0800
From:   Zhu Yanjun <zyjzyj2000@...il.com>
To:     Guoqing Jiang <guoqing.jiang@...ux.dev>
Cc:     syzbot <syzbot+eba589d8f49c73d356da@...kaller.appspotmail.com>,
        jgg@...pe.ca, leon@...nel.org, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [rdma?] INFO: trying to register non-static key in
 skb_dequeue (2)

On Tue, May 23, 2023 at 1:50 PM Guoqing Jiang <guoqing.jiang@...ux.dev> wrote:
>
>
>
> On 5/23/23 12:29, Zhu Yanjun wrote:
> > On Tue, May 23, 2023 at 12:10 PM Guoqing Jiang <guoqing.jiang@...ux.dev> wrote:
> >>
> >>
> >> On 5/23/23 12:02, Zhu Yanjun wrote:
> >>> On Tue, May 23, 2023 at 11:47 AM Zhu Yanjun <zyjzyj2000@...il.com> wrote:
> >>>> On Tue, May 23, 2023 at 10:26 AM Guoqing Jiang <guoqing.jiang@...ux.dev> 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.

The complaining is about "spinlock is not initialized".

Zhu Yanjun

>
> Guoqing