Re: Regression: NULL pointer dereference after NFS_V4_2_READ_PLUS (commit 7fd461c47)

[Anna Schumaker]

On Thu, Jun 15, 2023 at 4:55 AM Krzysztof Kozlowski
<krzysztof.kozlowski@xxxxxxxxxx> wrote:
>
> On 15/06/2023 10:52, Krzysztof Kozlowski wrote:
> > On 14/06/2023 22:55, Anna Schumaker wrote:
> >>>>> Still null ptr (built on 420b2d4 with your patch):
> >>>>
> >>>> We're through the merge window and at rc1 now, so I can spend more
> >>>> time scratching my head over your bug again. We've come up with a
> >>>> patch (attached) that adds a bunch of printks to show us what the
> >>>> kernel thinks is going on. Do you mind trying it out and letting us
> >>>> know what gets printed out? You'll need to make sure
> >>>> CONFIG_NFS_V4_2_READ_PLUS is enabled when compiling the kernel.
> >>>
> >>> The patch does not apply. I tried: v6.4-rc1, v6.4-rc5, next-20230609.
> >>
> >> Can you try the attached patch on top of my 3-patch series from the
> >> other day, and let me know what gets printed out? It adds a bunch of
> >> printk()s at strategic points to print out what is going on with the
> >> xdr scratch buffer since it's suddenly a bad memory address after
> >> working for a bit on your machine.
> >>
> >
> > Here you have entire log - attached (113 kB, I hope goes past mailing
> > lists/spam filters).
>
> As expected this bounced from the mailing lists, but I hope you got it.
> If not, let me know.

I did still receive it. Thanks!

Anna
>
> Best regards,
> Krzysztof
>